{"id":3250,"date":"2026-06-09T08:14:25","date_gmt":"2026-06-09T08:14:25","guid":{"rendered":"https:\/\/www.shengweimachine.com\/?page_id=3250"},"modified":"2026-07-07T04:20:23","modified_gmt":"2026-07-07T04:20:23","slug":"multi-head-weigher-vs-auger-filler","status":"publish","type":"page","link":"https:\/\/www.shengweimachine.com\/zh\/multi-head-weigher-vs-auger-filler\/","title":{"rendered":"\u591a\u5934\u79e4\u4e0e\u87ba\u65cb\u586b\u5145\u673a\u4e0e\u5bb9\u79ef\u5f0f\u91cf\u676f\u7684\u5bf9\u6bd4"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"3250\" class=\"elementor elementor-3250 elementor-bc-flex-widget\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a6b5bdb e-con-full e-flex e-con e-parent\" data-id=\"a6b5bdb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b3b7e07 elementor-widget elementor-widget-html\" data-id=\"b3b7e07\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"sw-page\">\n\n<section class=\"sw-hero-kb\">\n    <div class=\"sw-shell\">\n      <div class=\"sw-hero-kb-grid\">\n\n        <div class=\"sw-hero-kb-copy\">\n\n          <nav class=\"sw-breadcrumb\" aria-label=\"Breadcrumb\">\n            <a href=\"\/\">Home<\/a><span class=\"sw-breadcrumb-sep\">\u203a<\/span>\n            <a href=\"\/buying-guides\/\">Buying Guides<\/a><span class=\"sw-breadcrumb-sep\">\u203a<\/span>\n            <span>Multi-Head Weigher vs Auger vs Cup<\/span>\n          <\/nav>\n\n          <div class=\"sw-article-meta\">\n            <span class=\"sw-meta-author\">By <strong>Hellena Ji<\/strong>, International Sales Manager at <a href=\"\/about-us\/\">ShengWei Machine<\/a><\/span>\n            <span class=\"sw-meta-sep\">\u00b7<\/span>\n            <span class=\"sw-meta-date\">Published June 2026<\/span>\n            <span class=\"sw-meta-sep\">\u00b7<\/span>\n            <span class=\"sw-meta-readtime\">13-minute read<\/span>\n          <\/div>\n\n          <h1 class=\"sw-hero-kb-title\">\n            Multi-Head Weigher vs Auger Filler vs Volumetric Cup:\n            <span class=\"sw-hero-kb-subtitle\">The Dosing Accuracy &amp; Give-Away Guide<\/span>\n          <\/h1>\n\n          <aside class=\"sw-tldr\">\n            <div class=\"sw-tldr-label\">The Short Answer<\/div>\n            <p>The three methods differ in one thing: how they <em>measure<\/em> a dose. <strong>Multi-head weighers measure mass directly (gravimetric)<\/strong> \u2014 dose weight is not calculated from bulk density, so density drift has less direct effect than in volumetric methods. <strong>Auger fillers meter by screw rotation and cups by fixed volume (both volumetric)<\/strong> \u2014 simpler and faster, but weight drifts with density unless a checkweigher closes the loop. On high-value product, give-away cost usually outweighs machine price.<\/p>\n            <a href=\"javascript:void(0)\" class=\"sw-tldr-cta\" onclick=\"elementorProFrontend.modules.popup.showPopup({id:840})\" data-elementor-open-popup=\"840\">Skip the analysis \u2014 send your spec instead \u2192<\/a>\n          <\/aside>\n\n        <\/div>\n\n        <figure class=\"sw-hero-kb-visual sw-figure-zoom\">\n          <img decoding=\"async\" src=\"https:\/\/www.shengweimachine.com\/wp-content\/uploads\/2026\/06\/dosing-methods-hero-1024x683.webp\"\n               alt=\"Multi-head weigher, auger filler and volumetric cup filler side by side, each feeding a packaging bag\"\n               loading=\"eager\" fetchpriority=\"high\"\n               width=\"800\" height=\"533\">\n          <button type=\"button\" class=\"sw-figure-zoom-badge\" aria-label=\"View larger image\" tabindex=\"-1\">\n            <svg viewBox=\"0 0 20 20\" aria-hidden=\"true\"><path d=\"M9 1a8 8 0 105.293 14.293l4.207 4.207 1.414-1.414-4.207-4.207A8 8 0 009 1zm0 2a6 6 0 110 12 6 6 0 010-12zm-1 3v2H6v2h2v2h2v-2h2V8h-2V6H8z\"\/><\/svg>\n          <\/button>\n        <\/figure>\n\n      <\/div>\n    <\/div>\n  <\/section>\n\n<div class=\"sw-trust-strip-wrap\">\n    <div class=\"sw-shell\">\n      <div class=\"sw-trust-strip\">\n        <div class=\"sw-trust-item\">\n          <p class=\"sw-trust-label\">Authored by<\/p>\n          <p class=\"sw-trust-value\">Hellena Ji, International Sales Manager<\/p>\n        <\/div>\n        <div class=\"sw-trust-item\">\n          <p class=\"sw-trust-label\">Lead Time<\/p>\n          <p class=\"sw-trust-value\">15\u201320 days ex-works<\/p>\n        <\/div>\n        <div class=\"sw-trust-item\">\n          <p class=\"sw-trust-label\">Markets<\/p>\n          <p class=\"sw-trust-value\">80+ countries served<\/p>\n        <\/div>\n        <div class=\"sw-trust-item\">\n          <p class=\"sw-trust-label\">One Chassis<\/p>\n          <p class=\"sw-trust-value\">All three dosing methods, one collar-type family<\/p>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n\n<nav class=\"sw-guide-nav\" aria-label=\"In this guide\">\n    <div class=\"sw-shell\">\n      <div class=\"sw-guide-nav-inner\">\n        <span class=\"sw-guide-nav-label\">In this guide<\/span>\n        <div class=\"sw-guide-nav-scroll\">\n          <ol class=\"sw-guide-nav-list\">\n            <li><a class=\"sw-guide-nav-link\" href=\"#thesis\">A Measurement Decision<\/a><\/li>\n            <li><a class=\"sw-guide-nav-link\" href=\"#mechanism\">How Each Method Meters<\/a><\/li>\n            <li><a class=\"sw-guide-nav-link\" href=\"#matrix\">Decision Matrix<\/a><\/li>\n            <li><a class=\"sw-guide-nav-link\" href=\"#combinations\">The Head-Count Math<\/a><\/li>\n            <li><a class=\"sw-guide-nav-link\" href=\"#giveaway\">Give-Away Economics<\/a><\/li>\n            <li><a class=\"sw-guide-nav-link\" href=\"#changeover\">Cleaning &amp; Failure Modes<\/a><\/li>\n            <li><a class=\"sw-guide-nav-link\" href=\"#checkweigher\">Closed-Loop Feedback<\/a><\/li>\n            <li><a class=\"sw-guide-nav-link\" href=\"#tco\">Total Cost of Ownership<\/a><\/li>\n            <li><a class=\"sw-guide-nav-link\" href=\"#physics\">Product-Physics Edge Cases<\/a><\/li>\n            <li><a class=\"sw-guide-nav-link\" href=\"#faq\">FAQ<\/a><\/li>\n          <\/ol>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/nav>\n\n<section class=\"sw-section\" id=\"thesis\">\n    <div class=\"sw-shell\">\n      <h2 class=\"sw-section-title\" style=\"text-align:left\">Choosing a Dosing System Is a Measurement Decision, Not a Machine Decision<\/h2>\n\n      <p>Our <a href=\"\/how-to-choose-packaging-machine\/#step2\">Choosing Guide owns the first-pass product-to-dosing match<\/a> \u2014 which product class points to which method. This guide goes one layer deeper: it compares the three dry-solid dosing methods on the engineering and economics that actually decide <em>between<\/em> them once you know your product class \u2014 the accuracy mechanism, give-away cost, cleaning and changeover, failure modes, and total cost of ownership.<\/p>\n\n      <p>All three methods do the same job \u2014 drop a controlled amount of dry product into a bag \u2014 but they answer one question differently: how do you <strong>measure<\/strong> the dose? A multi-head combination weigher puts the product on a scale and reads its mass. An auger filler counts the turns of a screw. A volumetric cup fills a fixed-volume cavity and scrapes it level. That single difference \u2014 measuring mass versus measuring volume \u2014 sets the accuracy ceiling, the give-away floor, the cleaning burden, and ultimately the cost. This guide is about that difference and what it costs you.<\/p>\n\n      <p>One thing this page is <em>not<\/em>: a comparison of the bags themselves. Whether you form bags inline from rollstock or fill pre-made pouches is a separate decision covered in our <a href=\"\/premade-bag-vs-vffs\/\">Premade Bag vs VFFS guide<\/a>. Liquid and paste dosing (piston pumps, flow meters) are also out of scope \u2014 this is dry, granular, and powder solids only.<\/p>\n    <\/div>\n  <\/section>\n\n<section class=\"sw-section sw-section-alt\" id=\"mechanism\">\n    <div class=\"sw-shell\">\n      <h2 class=\"sw-section-title\" style=\"text-align:left\">How Each Method Actually Meters \u2014 the Root Cause of the Accuracy Hierarchy<\/h2>\n\n      <p>The accuracy difference between the three methods is not a matter of build quality or price tier. It comes directly from the physics of how each one measures a portion, and it falls into a simple split: one method is <strong>gravimetric<\/strong> (it weighs), and two are <strong>volumetric<\/strong> (they meter a volume and rely on the product's bulk density to convert that volume into a weight).<\/p>\n\n      <p>A <strong>multi-head combination weigher<\/strong> is gravimetric. Product cascades from a central cone across a ring of vibratory pans into a circle of weighing hoppers, each sitting on its own load cell. The machine reads the actual mass in every hopper, then a controller picks the combination of hoppers whose total comes closest to \u2014 and at or above \u2014 the target weight. Because the dose weight is measured rather than calculated from bulk density, a change in product density does not directly throw off the fill. (It is not immune to everything \u2014 infeed distribution, settling time, and discharge behaviour still matter \u2014 but density drift, the thing that defeats volumetric methods, is largely designed out.)<\/p>\n\n      <p>An <strong>auger filler<\/strong> is semi-volumetric. A flighted screw inside a dosing tube turns a programmed number of revolutions, and each revolution displaces a fixed volume of powder. The delivered weight is volume \u00d7 bulk density, so as the powder's density shifts \u2014 with compaction, particle size, or moisture \u2014 the weight drifts. Servo-driven augers and a steady hopper head pressure tighten this considerably, and a net-weigh auger adds a load cell to close the loop, but the underlying meter is still counting screw turns, not weighing product.<\/p>\n\n      <p>A <strong>volumetric cup filler<\/strong> is pure volumetric. Telescopic cups pass under a hopper, fill by gravity, get scraped level to a fixed volume, then tip their contents into the bag. The delivered weight is cup volume \u00d7 bulk density and nothing else, so any change in density \u2014 from vibration, compaction during a line stop, or aeration at speed \u2014 lands straight in the package weight.<\/p>\n\n      <figure class=\"sw-content-figure sw-figure-zoom\">\n        <img decoding=\"async\" src=\"https:\/\/www.shengweimachine.com\/wp-content\/uploads\/2026\/06\/dosing-metering-mechanism-1024x683.webp\"\n             alt=\"How each dosing method measures \u2014 load-cell weighing, screw rotation, and fixed cup volume \u2014 and why density sensitivity rises across them\"\n             loading=\"lazy\" width=\"800\" height=\"533\">\n        <button type=\"button\" class=\"sw-figure-zoom-badge\" aria-label=\"View larger image\" tabindex=\"-1\">\n          <svg viewBox=\"0 0 20 20\" aria-hidden=\"true\"><path d=\"M9 1a8 8 0 105.293 14.293l4.207 4.207 1.414-1.414-4.207-4.207A8 8 0 009 1zm0 2a6 6 0 110 12 6 6 0 010-12zm-1 3v2H6v2h2v2h2v-2h2V8h-2V6H8z\"\/><\/svg>\n        <\/button>\n        <figcaption>The three metering principles. Density sensitivity rises from the weight-based weigher to the volume-based cup.<\/figcaption>\n      <\/figure>\n\n      <p>That gives the qualitative precision order most engineers will recognise: volumetric cup, then volumetric auger, then net-weigh auger, then the combination weigher at the top. A practical caution before you ask for numbers: vendor accuracy figures are real but they are best-case, lab-condition positioning \u2014 always read them with the product and the test condition attached. \"Accuracy\" is also not a single number; it splits into repeatability, linearity, and stability, so a filler with tight repeatability (the spec most vendors quote) can still sit consistently off target. The right comparison is the mechanism and the give-away it produces in <em>your<\/em> conditions, which is where the rest of this guide goes. For the product-physics that points you to a method in the first place, see the dosing section of our <a href=\"\/how-to-choose-packaging-machine\/#step2\">Choosing Guide<\/a>.<\/p>\n    <\/div>\n  <\/section>\n\n<section class=\"sw-section\" id=\"matrix\">\n    <div class=\"sw-shell\">\n      <h2 class=\"sw-section-title\" style=\"text-align:left\">Decision Matrix \u2014 Where the Three Methods Genuinely Differ<\/h2>\n\n      <p>The matrix below compares the three methods on the dimensions that actually separate them in service. It deliberately leaves out \"which product uses which method\" \u2014 that lookup belongs to the <a href=\"\/how-to-choose-packaging-machine\/#step2\">dosing section of our Choosing Guide<\/a>. Use this once you already know your product class and need to size accuracy, give-away, cleaning, and cost.<\/p>\n\n      <div class=\"sw-decision-table-wrap\">\n        <table class=\"sw-decision-table\">\n          <thead>\n            <tr><th>Dimension<\/th><th>Multi-Head Weigher<\/th><th>Auger Filler<\/th><th>Volumetric Cup<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr>\n              <td data-label=\"Dimension\"><strong>Metering principle<\/strong><\/td>\n              <td data-label=\"Multi-Head\">Gravimetric \u2014 mass measured, then best combination selected.<\/td>\n              <td data-label=\"Auger\">Semi-volumetric \u2014 screw-rotation count; weight = volume \u00d7 density.<\/td>\n              <td data-label=\"Cup\">Pure volumetric \u2014 fixed cup volume \u00d7 density.<\/td>\n            <\/tr>\n            <tr>\n              <td data-label=\"Dimension\"><strong>Give-away floor<\/strong><\/td>\n              <td data-label=\"Multi-Head\">Lowest \u2014 the combination search drives the dose to just above target.<\/td>\n              <td data-label=\"Auger\">Mid \u2014 a net-weigh head with checkweigher feedback closes most of the gap.<\/td>\n              <td data-label=\"Cup\">Highest open-loop \u2014 needs checkweigher feedback to compete.<\/td>\n            <\/tr>\n            <tr>\n              <td data-label=\"Dimension\"><strong>Density \/ shape sensitivity (where open-loop fails)<\/strong><\/td>\n              <td data-label=\"Multi-Head\">Dose not calculated from bulk density; tolerates density swing.<\/td>\n              <td data-label=\"Auger\">Drifts with density and falling head pressure; bridging on cohesive powder.<\/td>\n              <td data-label=\"Cup\">Fully density-dependent; compaction and aeration move weight directly.<\/td>\n            <\/tr>\n            <tr>\n              <td data-label=\"Dimension\"><strong>Cleaning \/ changeover<\/strong><\/td>\n              <td data-label=\"Multi-Head\">Most product-contact parts, but tool-free hopper lift-off and duplicate-hopper swaps on hygienic models.<\/td>\n              <td data-label=\"Auger\">Screw + tube teardown for a wet wash; cohesive powder builds in clearances.<\/td>\n              <td data-label=\"Cup\">Fastest \u2014 adjust cup volume or swap the cup set in minutes.<\/td>\n            <\/tr>\n            <tr>\n              <td data-label=\"Dimension\"><strong>Closed-loop checkweigher value<\/strong><\/td>\n              <td data-label=\"Multi-Head\">QA only \u2014 the weigher is already internally closed-loop.<\/td>\n              <td data-label=\"Auger\">Primary accuracy loop \u2014 feedback trims screw revolutions on the fly.<\/td>\n              <td data-label=\"Cup\">Primary accuracy loop \u2014 feedback adjusts cup volume on the fly.<\/td>\n            <\/tr>\n            <tr>\n              <td data-label=\"Dimension\"><strong>Capex tier (directional)<\/strong><\/td>\n              <td data-label=\"Multi-Head\">Premium.<\/td>\n              <td data-label=\"Auger\">Mid.<\/td>\n              <td data-label=\"Cup\">Entry.<\/td>\n            <\/tr>\n            <tr>\n              <td data-label=\"Dimension\"><strong>Throughput ceiling<\/strong><\/td>\n              <td data-label=\"Multi-Head\">High, and scales across multiple lanes.<\/td>\n              <td data-label=\"Auger\">Mid \u2014 gated by the weigh\/dose cycle on net-weigh models.<\/td>\n              <td data-label=\"Cup\">Mid \u2014 fast and mechanical on uniform free-flowing product.<\/td>\n            <\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n\n      <h3 class=\"sw-title-sub\">Quick view \u2014 levers, not a product table<\/h3>\n\n      <p><strong>Lean toward a multi-head weigher when<\/strong> give-away is your dominant cost, when pack weights must stay tight as bulk density swings, or when gentle handling and high throughput justify the premium budget tier.<\/p>\n      <p><strong>Lean toward an auger when<\/strong> the dose has to be tightly controlled and dust contained, and a steady screw meter plus a net-weigh head and closed-loop checkweigher feedback reaches your accuracy class at a mid budget tier.<\/p>\n      <p><strong>Lean toward a volumetric cup when<\/strong> bulk density is stable, mechanical simplicity and the fastest changeover matter most, and a downstream checkweigher can correct slow drift cheaply at the entry budget tier. These are engineering levers \u2014 give-away stakes, density stability, closed-loop feedback, changeover, and budget \u2014 not a product lookup. For the first-pass product-class match, use the dosing section of our <a href=\"\/how-to-choose-packaging-machine\/#step2\">Choosing Guide<\/a>; for the price impact of the dosing choice, see our <a href=\"\/packaging-machine-price-guide\/\">Packaging Machine Price Guide<\/a>.<\/p>\n    <\/div>\n  <\/section>\n\n<section class=\"sw-section sw-section-alt\" id=\"combinations\">\n    <div class=\"sw-shell\">\n      <h2 class=\"sw-section-title\" style=\"text-align:left\">The Head-Count Math: Why More Weigh Heads Cut Give-Away<\/h2>\n\n      <p>The reason a multi-head weigher gives away so little product is statistical, and it is worth understanding because it explains both why head count matters and why more heads eventually stops helping.<\/p>\n\n      <p>The machine fills <em>n<\/em> weighing hoppers, reads each one's mass, then searches every possible combination of hoppers for the subset whose total is closest to the target while still meeting or exceeding it. The number of non-empty combinations it can choose from is 2\u207f \u2212 1: a <strong>10-head weigher has 1,023 combinations<\/strong>, a <strong>14-head weigher has 16,383<\/strong>, and a <strong>24-head weigher has roughly 16.7 million<\/strong>. With each hopper ideally holding 20\u201335% of the target, more candidate sums means the smallest combination that still clears the target lands closer to it \u2014 so average overfill falls. Crucially, the saving is statistical: it comes from having more sums to pick from, not from dispensing more product per cycle.<\/p>\n\n      <p>The benefit is not linear. Going from 10 to 14 heads is a large jump in combinations and a real cut in give-away; going from 14 to 24 yields diminishing returns on a single-product line, because the physical settling time of the product in the hoppers (on the order of two-thirds of a second per cycle) and the evenness of the infeed start to dominate over further statistical precision. That is why very high head counts tend to appear on multi-product mixing lines rather than single-SKU runs.<\/p>\n\n      <p>The same math runs in reverse when a machine is poorly maintained. Lose a single active head \u2014 to a fault or a zero-drift error \u2014 and the search space is cut in half, forcing the controller to settle for a less precise combination. One vendor's worked example put the cost of a single dropped head at roughly a doubling of give-away, on the order of an extra <strong>$130 per hour<\/strong> of product on a fast line (vendor-claim) \u2014 a reminder that the give-away advantage you pay for at purchase only persists if every head stays calibrated.<\/p>\n    <\/div>\n  <\/section>\n\n<section class=\"sw-section\" id=\"giveaway\">\n    <div class=\"sw-shell\">\n      <h2 class=\"sw-section-title\" style=\"text-align:left\">Give-Away Economics \u2014 Why Dosing Accuracy Is Money<\/h2>\n\n      <p>Overfill is not a casual buffer; it is a regulated number that sits directly on your margin. Net-content law is what turns dosing accuracy into a financial decision, and the mechanism is the same on both sides of the Atlantic.<\/p>\n\n      <p>In the United States, <a href=\"https:\/\/www.nist.gov\/pml\/owm\/publications\/nist-handbooks\/handbook-133-current-edition\" rel=\"nofollow noopener\" target=\"_blank\">NIST Handbook 133<\/a> requires that the average net quantity of a lot at least equal the declared quantity, while no individual package may be short by more than a Maximum Allowable Variation. Internationally, OIML R 87 and the EU \"e-mark\" rules apply the same logic in three parts: the batch average must be at least the nominal quantity; <strong>no more than 2.5% of packages may fall below the declared quantity by more than the Tolerable Negative Error (TNE), and no package may fall below by more than twice the TNE<\/strong>.<\/p>\n\n      <p>The practical consequence is that a packer cannot aim at the label weight \u2014 they must aim above it. The target is set at the declared weight plus a buffer sized to the dosing system's standard deviation (\u03c3), so that the average stays safely above nominal and almost no packages breach the tolerance. The tighter the dosing \u2014 fewer grams of \u03c3 \u2014 the smaller that buffer can be, and the less product you give away on every pack. That is the entire economic case for a more accurate filler, and it scales: one peer-reviewed analysis found that a <strong>1% reduction in overfill was worth roughly $500,000 a year<\/strong> for a processor running about one million packages a week, fifty weeks a year, at a product value near $1 per pound (public-data \u2014 figures move with volume and product value).<\/p>\n\n      <aside class=\"sw-firstperson\">\n        <div class=\"sw-firstperson-label\">Illustrative give-away model \u2014 high-value coffee (derived-calculation, US Handbook 133 regime, inputs shown)<\/div>\n        <p><strong>Inputs (label each as your own assumption before quoting):<\/strong> declared weight 454 g (1 lb); product value $22.05\/kg (about $10\/lb); annual output 5,000,000 units. Open-loop volumetric\/auger fill standard deviation \u03c3 \u2248 4.54 g (about 1.0%); tightly-controlled servo auger with checkweigher feedback \u03c3 \u2248 1.13 g (about 0.25%). Target = declared + 2\u03c3 to satisfy the lot-average and tolerance rules.<br><br><strong>Derived calculation:<\/strong> the open-loop line averages about 9.1 g of overfill per pack \u2192 roughly <strong>$1.0 million\/year<\/strong> of give-away; the tightly-controlled line averages about 2.3 g \u2192 roughly <strong>$0.25 million\/year<\/strong>. The gap \u2014 about <strong>$0.75 million\/year<\/strong> \u2014 is the prize for cutting \u03c3 on a high-value product. Every figure here is a derived-calculation from the stated inputs, not a measured plant number; change product value, volume, or \u03c3 and it moves proportionally.<\/p>\n      <\/aside>\n\n      <figure class=\"sw-content-figure sw-figure-zoom\">\n        <img decoding=\"async\" src=\"https:\/\/www.shengweimachine.com\/wp-content\/uploads\/2026\/06\/give-away-target-weight-curve-1024x683.webp\"\n             alt=\"Tighter fill variation lets the target weight sit closer to the declared weight, shrinking give-away\"\n             loading=\"lazy\" width=\"800\" height=\"533\">\n        <button type=\"button\" class=\"sw-figure-zoom-badge\" aria-label=\"View larger image\" tabindex=\"-1\">\n          <svg viewBox=\"0 0 20 20\" aria-hidden=\"true\"><path d=\"M9 1a8 8 0 105.293 14.293l4.207 4.207 1.414-1.414-4.207-4.207A8 8 0 009 1zm0 2a6 6 0 110 12 6 6 0 010-12zm-1 3v2H6v2h2v2h2v-2h2V8h-2V6H8z\"\/><\/svg>\n        <\/button>\n        <figcaption>Tighter fill variation lets the target weight move closer to the declared weight \u2014 the shaded give-away shrinks.<\/figcaption>\n      <\/figure>\n\n      <p>This is why give-away, not machine price, is usually the number that decides a high-value line \u2014 a theme the total-cost section below returns to. For where dosing sits in the wider quote, see our <a href=\"\/packaging-machine-price-guide\/\">Packaging Machine Price Guide<\/a>.<\/p>\n    <\/div>\n  <\/section>\n\n<section class=\"sw-section sw-section-alt\" id=\"changeover\">\n    <div class=\"sw-shell\">\n      <h2 class=\"sw-section-title\" style=\"text-align:left\">Cleaning, Changeover &amp; the Failure Modes You Will Actually Meet<\/h2>\n\n      <p>Sanitation and changeover are where the three methods feel most different on the plant floor, especially in allergen facilities or on lines that switch product class often.<\/p>\n\n      <p>A <strong>volumetric cup filler<\/strong> changes over fastest: adjust the telescopic cup gap to retune the volume, or swap the cup set to move to a different product, often tool-free in minutes. An <strong>auger filler<\/strong> is the heaviest teardown \u2014 the hopper lid, the screw, and the agitator come out for a wet wash, and cohesive powder packs into the tight drive clearances, so a thorough allergen clean takes real labour (split-hopper and quick-release designs cut this down). A <strong>multi-head weigher<\/strong> has the largest product-contact area of the three \u2014 a top cone plus ten to twenty-four pans and their hoppers \u2014 but on hygienic models these lift off without tools, and many plants keep a second set of contact hoppers to swap clean-for-dirty and keep running. A useful reference point from a confectionery line: a topping changeover three or four times a day at about <strong>30 minutes each using an air purge<\/strong>, with a full wet washdown weekly. (Note this is a dosing-head and product-class switch \u2014 a different operation from the 15\u201330 minute bag-width changeover baseline on the bagger, covered in the <a href=\"\/how-to-choose-packaging-machine\/#step5\">changeover section of our Choosing Guide<\/a>.)<\/p>\n\n      <p>Each method also has its own signature failure modes, and knowing them is half of writing a good RFQ:<\/p>\n      <ul>\n        <li><strong>Auger:<\/strong> cohesive powder <em>bridges<\/em> over the hopper throat or channels into a <em>rathole<\/em>, starving the screw; as the hopper empties, falling <em>head pressure<\/em> drifts the weight down; and very free-flowing or aerated product can <em>flood<\/em> past the screw entirely, causing massive overfills.<\/li>\n        <li><strong>Multi-head weigher:<\/strong> at speed, gate vibration causes <em>bucket bounce<\/em> that unsettles the load cells; dry or oily product builds a <em>static charge<\/em> and clings to the pans, throwing off the combination timing; and a misassembly after cleaning leaves the scale's <em>zero drifting<\/em>.<\/li>\n        <li><strong>Volumetric cup:<\/strong> vibration or a line stop <em>compacts<\/em> the product and overfills; high disk speed <em>aerates<\/em> it and underfills; and fine powder throws <em>dust into the seal zone<\/em>, where it settles on the seal surfaces and causes leaking bags.<\/li>\n      <\/ul>\n\n      <figure class=\"sw-content-figure sw-figure-zoom\">\n        <img decoding=\"async\" src=\"https:\/\/www.shengweimachine.com\/wp-content\/uploads\/2026\/06\/dosing-failure-modes-matrix-1024x683.webp\"\n             alt=\"Common failure modes by method \u2014 weigher bounce, static and drift; auger bridging, head-pressure and flooding; cup compaction, aeration and dust\"\n             loading=\"lazy\" width=\"800\" height=\"533\">\n        <button type=\"button\" class=\"sw-figure-zoom-badge\" aria-label=\"View larger image\" tabindex=\"-1\">\n          <svg viewBox=\"0 0 20 20\" aria-hidden=\"true\"><path d=\"M9 1a8 8 0 105.293 14.293l4.207 4.207 1.414-1.414-4.207-4.207A8 8 0 009 1zm0 2a6 6 0 110 12 6 6 0 010-12zm-1 3v2H6v2h2v2h2v-2h2V8h-2V6H8z\"\/><\/svg>\n        <\/button>\n        <figcaption>Each method's signature failure modes \u2014 worth naming in the RFQ so the supplier specifies the right counter-measures.<\/figcaption>\n      <\/figure>\n    <\/div>\n  <\/section>\n\n<section class=\"sw-section\" id=\"checkweigher\">\n    <div class=\"sw-shell\">\n      <h2 class=\"sw-section-title\" style=\"text-align:left\">The Checkweigher Asymmetry That Changes the Math<\/h2>\n\n      <p>A downstream checkweigher verifies every pack's weight after filling, but its value is very different depending on which dosing method sits upstream \u2014 and this asymmetry is the key to closing the gap cheaply.<\/p>\n\n      <p>A <strong>multi-head weigher is already internally closed-loop<\/strong>: it weighs every dose before it discharges, so a downstream checkweigher is mostly a quality-assurance backstop, catching product that stuck to a chute after the buckets opened or foreign mass in the pack. For an <strong>auger or a cup, the dosing is open-loop<\/strong> \u2014 neither can sense that the product's bulk density has drifted \u2014 so the downstream checkweigher becomes the <em>primary<\/em> accuracy-closing loop. It tracks the moving average of pack weights and feeds a correction back to the filler: on an auger it trims the servo's screw revolutions; on a cup it nudges the telescopic volume \u2014 both on the fly, without stopping the line.<\/p>\n\n      <figure class=\"sw-content-figure sw-figure-zoom\">\n        <img decoding=\"async\" src=\"https:\/\/www.shengweimachine.com\/wp-content\/uploads\/2026\/06\/checkweigher-feedback-asymmetry-1024x683.webp\"\n             alt=\"A multi-head weigher uses a downstream checkweigher only for QA, while an auger or cup uses it as the primary loop that adjusts the dose\"\n             loading=\"lazy\" width=\"800\" height=\"533\">\n        <button type=\"button\" class=\"sw-figure-zoom-badge\" aria-label=\"View larger image\" tabindex=\"-1\">\n          <svg viewBox=\"0 0 20 20\" aria-hidden=\"true\"><path d=\"M9 1a8 8 0 105.293 14.293l4.207 4.207 1.414-1.414-4.207-4.207A8 8 0 009 1zm0 2a6 6 0 110 12 6 6 0 010-12zm-1 3v2H6v2h2v2h2v-2h2V8h-2V6H8z\"\/><\/svg>\n        <\/button>\n        <figcaption>The checkweigher is QA-only on a weigher that already weighs each dose, but the primary accuracy loop on an open-loop auger or cup.<\/figcaption>\n      <\/figure>\n\n      <p>The practical takeaway is that checkweigher feedback delivers its biggest return on the two volumetric methods. A uniform, free-flowing product on a servo cup or auger with a feedback checkweigher can hold weights that compete with a gravimetric system, at a fraction of the capital cost \u2014 which is exactly why \"a cheaper filler plus a checkweigher\" is often the right answer rather than jumping straight to the premium weigher.<\/p>\n    <\/div>\n  <\/section>\n\n<section class=\"sw-section sw-section-alt\" id=\"tco\">\n    <div class=\"sw-shell\">\n      <h2 class=\"sw-section-title\" style=\"text-align:left\">Total Cost of Ownership: Give-Away Usually Beats Machine Price<\/h2>\n\n      <p>On purchase price alone the order is clear and directional: a volumetric cup filler sits at the entry tier, an auger in the middle, and a multi-head weigher at the premium end. If that were the whole story, the cheapest machine would win. It is not the whole story.<\/p>\n\n      <p>Over a five-year life the dominant cost on a high-value product is not the machine \u2014 it is the give-away. Returning to the illustrative coffee model above, the difference in annual give-away between an open-loop volumetric filler and a tightly-controlled gravimetric one runs to roughly three-quarters of a million dollars a year (derived-calculation, inputs shown). A gap of that size dwarfs any realistic difference in machine price, which means the premium gravimetric machine can carry the <em>lowest<\/em> total cost of ownership despite the highest sticker \u2014 and, in that illustrative high-value model, cumulative give-away savings can exceed the machine-price gap within the first production year. That is a model result for a high-value SKU, not a universal promise: on a low-value commodity, where give-away is cheap, the cheaper method often wins outright.<\/p>\n\n      <figure class=\"sw-content-figure sw-figure-zoom\">\n        <img decoding=\"async\" src=\"https:\/\/www.shengweimachine.com\/wp-content\/uploads\/2026\/06\/dosing-tco-giveaway-dominance-1024x683.webp\"\n             alt=\"Five-year total cost of ownership \u2014 give-away cost dominates over machine price on high-value product\"\n             loading=\"lazy\" width=\"800\" height=\"533\">\n        <button type=\"button\" class=\"sw-figure-zoom-badge\" aria-label=\"View larger image\" tabindex=\"-1\">\n          <svg viewBox=\"0 0 20 20\" aria-hidden=\"true\"><path d=\"M9 1a8 8 0 105.293 14.293l4.207 4.207 1.414-1.414-4.207-4.207A8 8 0 009 1zm0 2a6 6 0 110 12 6 6 0 010-12zm-1 3v2H6v2h2v2h2v-2h2V8h-2V6H8z\"\/><\/svg>\n        <\/button>\n        <figcaption>On high-value product, the five-year give-away line dwarfs the machine-price difference between the methods (illustrative, relative scale).<\/figcaption>\n      <\/figure>\n\n      <p>The decision rule that falls out of this is simple. Multiply your expected give-away gap by your product value and your annual volume before you compare machine quotes \u2014 on a high-value, high-volume SKU, as in the illustrative coffee model above, the give-away savings can exceed the machine-price gap within the first production year; on a cheap, stable product they rarely do, so run the give-away calculation before you decide. For the wider quote build-up around the dosing choice, see our <a href=\"\/packaging-machine-price-guide\/\">Packaging Machine Price Guide<\/a>.<\/p>\n    <\/div>\n  <\/section>\n\n<section class=\"sw-section\" id=\"physics\">\n    <div class=\"sw-shell\">\n      <h2 class=\"sw-section-title\" style=\"text-align:left\">Product-Physics Edge Cases \u2014 the \"Why\" Behind the Rules<\/h2>\n\n      <p>For the first-pass product-to-method match, see the dosing section of our <a href=\"\/how-to-choose-packaging-machine\/#step2\">Choosing Guide<\/a>; what follows is the physics behind those rules \u2014 the failure mechanisms that explain why each method has the boundaries it does.<\/p>\n\n      <p>Fine, cohesive powder \u2014 flour, chilli, chemical fines \u2014 resists gravity flow because of strong interparticle forces. Dropped into a volumetric cup it bridges across the cavity or clings to the walls and meters erratically, which is why this class of product needs a screw: the auger physically shears the powder and forces it down the tube in a controlled stream. Free-flowing granule is the opposite problem. Sugar, salt, or rice moves so easily that a standard open-flight auger lets it flood straight through the screw clearances, so a cup or a weigher is the natural fit. When a product's bulk density or moisture swings widely from batch to batch, no volumetric meter can keep up \u2014 only a gravimetric weigher, measuring mass directly, holds the weight as the density moves underneath it.<\/p>\n\n      <p>Two more boundaries come up constantly. Sticky, oily, or adhesive product \u2014 dried fruit, gummies, shredded cheese \u2014 clings to smooth weigher buckets and will not discharge cleanly, so a multi-head weigher for this work is built with dimple-plate, PTFE-coated, or wire-mesh contact surfaces to release it. And mixed, irregular, or fragile product \u2014 chips, pretzels, trail mix, frozen seafood \u2014 cannot survive a screw's shear or a cup's bridging, but a multi-head weigher moves it gently down wide chutes and, in the case of mixes, combines several ingredients to a single target weight in one drop. These are the cases where the physics, not the price, makes the decision.<\/p>\n    <\/div>\n  <\/section>\n\n<section class=\"sw-section sw-section-alt\" id=\"cases\">\n    <div class=\"sw-shell\">\n      <h2 class=\"sw-section-title\" style=\"text-align:left\">How the Trade-off Plays Out in Practice<\/h2>\n\n      <p>The pattern across real lines is consistent. On high-value or hard-to-handle product \u2014 premium protein, specialty coffee, fragile snacks, mixed assortments \u2014 the dosing method is chosen for give-away and product integrity, not for the lowest machine price, and equipment makers market hard on give-away reduction precisely because that is where the money is. On stable, low-value commodity the opposite holds, and the simplest filler wins. The total-cost model earlier in this guide is just that logic made explicit: run your own give-away number against your product value and annual volume, and the right method usually picks itself.<\/p>\n\n      <p>ShengWei builds all three dosing methods on a single collar-type chassis, so the choice is a configuration rather than a different machine: a <a href=\"\/collar-type-packing-machine\/collar-type-multi-heads-granule-weigher-packing-machine\/\">multi-head weigher collar machine<\/a> for the highest accuracy and gentlest handling, an <a href=\"\/collar-type-packing-machine\/collar-type-auger-powder-automatic-packing-machine\/\">auger powder collar machine<\/a> for controlled powder dosing with dust containment, a <a href=\"\/collar-type-packing-machine\/collar-type-linear-weigher-packing-machine\/\">linear weigher collar machine<\/a> for a mid-accuracy tier, and a <a href=\"\/collar-type-packing-machine\/collar-type-measure-cups-packing-machine\/\">measuring-cup collar machine<\/a> for the simplest, fastest filling \u2014 all sharing the same <a href=\"\/collar-type-packing-machine\/\">collar-type packing platform<\/a>. For multi-lane scale, the same dosing heads sit on our <a href=\"\/full-automatic-vertical-packing-machine\/\">full-automatic vertical platforms<\/a>, including the <a href=\"\/full-automatic-vertical-packing-machine\/automatic-six-column-three-side-sealing-vertical-packaging-machine\/\">six-column three-side-seal machine<\/a> and the <a href=\"\/full-automatic-vertical-packing-machine\/automatic-ten-columns-back-sealing-vertical-packaging-machine\/\">ten-column back-seal machine<\/a>. If you are filling pre-made pouches rather than forming bags inline, the dosing head feeds a <a href=\"\/premade-bag-packing-machine\/\">premade bag machine<\/a> instead; if you are still settling the bag style, start at our <a href=\"\/pouch-types\/\">Pouch Types Hub<\/a>. To see how we inspect and run-test these lines before shipment, visit the <a href=\"\/factory\/\">Factory &amp; Quality Center<\/a>.<\/p>\n    <\/div>\n  <\/section>\n\n<section class=\"sw-section\" id=\"faq\">\n    <div class=\"sw-shell\">\n      <h2 class=\"sw-section-title\" style=\"text-align:left\">Frequently Asked Questions<\/h2>\n\n      <div class=\"sw-accordion\">\n\n        <details>\n          <summary><h3>What is the real difference between a multi-head weigher, an auger filler, and a volumetric cup filler?<\/h3><\/summary>\n          <p>They differ in how they measure a dose. A multi-head weigher is gravimetric \u2014 it weighs product in many hoppers and selects the combination closest to target. An auger filler is semi-volumetric \u2014 it meters by counting screw rotations, so the weight depends on bulk density. A volumetric cup is pure volumetric \u2014 it fills a fixed cup volume, so the weight is volume times density. That measurement difference, not build quality, sets the accuracy order. For which method your specific product points to, see the dosing section of our <a href=\"\/how-to-choose-packaging-machine\/#step2\">Choosing Guide<\/a>.<\/p>\n        <\/details>\n\n        <details>\n          <summary><h3>Why is a multi-head weigher more accurate than an auger or cup?<\/h3><\/summary>\n          <p>Because it measures mass directly. The dose weight is read off load cells rather than calculated from the product's bulk density, so a change in density \u2014 from compaction, moisture, or particle size \u2014 does not directly throw off the fill. Augers and cups meter a volume and rely on density to convert it to weight, so when density drifts, the weight drifts with it unless a downstream checkweigher closes the loop.<\/p>\n        <\/details>\n\n        <details>\n          <summary><h3>Does adding more weigh heads always improve accuracy?<\/h3><\/summary>\n          <p>Up to a point. More heads mean more weight combinations to choose from \u2014 10 heads give 1,023, 14 give 16,383 \u2014 so the machine can land closer to target with less give-away. But the benefit flattens around 14 heads on a single-product line, because the product's settling time and the evenness of the infeed start to limit the cycle more than statistics do. Very high head counts are mainly for multi-product mixing rather than single-SKU precision.<\/p>\n        <\/details>\n\n        <details>\n          <summary><h3>How does dosing accuracy translate into money?<\/h3><\/summary>\n          <p>Net-content law requires the average pack to meet the declared weight, so a packer must aim above the label by a buffer sized to the filler's variation. Tighter dosing means a smaller buffer and less product given away on every pack. The effect scales: one peer-reviewed analysis put a 1% cut in overfill at roughly $500,000 a year for a processor running about a million packages a week at a product value near $1 per pound. The figure moves with your volume and product value, but the direction is always the same.<\/p>\n        <\/details>\n\n        <details>\n          <summary><h3>Can a cheaper volumetric filler hit the same accuracy as a weigher?<\/h3><\/summary>\n          <p>On uniform, free-flowing product, often yes \u2014 by adding a downstream checkweigher in a closed loop. The checkweigher tracks the running average and feeds a correction back to the filler, trimming auger revolutions or cup volume on the fly to cancel slow density drift. This delivers its biggest return on the two volumetric methods, which is why \"a servo cup or auger plus a feedback checkweigher\" is frequently the most cost-effective route rather than jumping straight to a premium weigher.<\/p>\n        <\/details>\n\n        <details>\n          <summary><h3>Which dosing method is hardest and easiest to clean and change over?<\/h3><\/summary>\n          <p>A volumetric cup is the easiest and fastest \u2014 retune the cup volume or swap the cup set, often tool-free in minutes. An auger is the heaviest teardown, because the screw and tube come out for a wet wash and cohesive powder packs into the clearances. A multi-head weigher has the most product-contact parts, but hygienic models lift the hoppers off without tools, and many plants keep a duplicate hopper set to swap clean-for-dirty and minimise downtime.<\/p>\n        <\/details>\n\n        <details>\n          <summary><h3>What are the most common dosing failures by method?<\/h3><\/summary>\n          <p>Augers suffer bridging and ratholing in the hopper, weight drift as head pressure falls, and flooding when the product is too free-flowing. Multi-head weighers suffer bucket bounce at speed, static cling on dry or oily product, and zero drift after a careless reassembly. Volumetric cups suffer compaction drift, aeration error at high speed, and dust settling into the seal zone and causing leaking bags. Naming the ones relevant to your product in the RFQ gets the right counter-measures specified up front.<\/p>\n        <\/details>\n\n        <details>\n          <summary><h3>Is a multi-head weigher worth the higher price?<\/h3><\/summary>\n          <p>It depends on your product value and volume. In our illustrative high-value coffee model, the give-away savings from tighter dosing can exceed the machine-price gap within the first production year \u2014 a derived-calculation from stated inputs, not a universal promise. On a low-value, stable commodity, where give-away is cheap, a cup or auger usually wins. The test is simple: multiply your expected give-away gap by product value and annual volume, then compare it to the machine-price difference.<\/p>\n        <\/details>\n\n        <details>\n          <summary><h3>What lead time should I expect on a dosing system from China?<\/h3><\/summary>\n          <p>ShengWei base models \u2014 standard configurations of our collar-type fillers in multi-head, auger, linear-weigher, and cup versions \u2014 ship in 15\u201320 days ex-works. Custom multi-lane builds and complete integrated lines run longer; confirm scope in the RFQ. Add four to six weeks of ocean transit when comparing ex-works against delivered quotes, and budget the checkweigher and any dust-control hardware as line items rather than afterthoughts.<\/p>\n        <\/details>\n\n      <\/div>\n    <\/div>\n  <\/section>\n\n<section class=\"sw-cta-dark\" id=\"cta\">\n    <div class=\"sw-shell\">\n      <div class=\"sw-cta-grid\">\n        <div>\n          <span class=\"sw-eyebrow\">Ready to Decide<\/span>\n          <h2 class=\"sw-section-title\" style=\"text-align:left\">Send Your Product Spec for a Dosing Recommendation<\/h2>\n          <p class=\"sw-lead\">Send us your product type, bulk density, target fill weight, required accuracy class, and annual volume. We'll write back with a recommended dosing method (multi-head weigher, auger, linear weigher, or cup), the chassis it mounts on, whether a feedback checkweigher pays for itself on your numbers, an FOB price range from current 2026 quotes, and lead time and shipping notes for your region. We usually reply within one business day, on business days.<\/p>\n          <p class=\"sw-workflow-text\">info@shengweimachine.com &middot; +86 181 2511 2025 &middot; or <a href=\"\/contact\/\">contact our engineering team<\/a> directly<\/p>\n          <div class=\"sw-sales-signature\" id=\"author\">\n            <img decoding=\"async\" src=\"https:\/\/www.shengweimachine.com\/wp-content\/uploads\/2026\/04\/hellena-ji-international-sales-manager-150x150.webp\"\n                 alt=\"Hellena Ji, International Sales Manager at ShengWei Machine\"\n                 loading=\"lazy\" width=\"80\" height=\"80\">\n            <div>\n              <strong>Hellena Ji<\/strong><br>\n              International Sales Manager &middot; <a href=\"\/about-us\/\">ShengWei Machine<\/a>\n            <\/div>\n          <\/div>\n        <\/div>\n      <\/div>\n\n      <div class=\"sw-cta-buttons\">\n        <a href=\"javascript:void(0)\"\n           onclick=\"elementorProFrontend.modules.popup.showPopup({id:840})\"\n           data-elementor-open-popup=\"840\"\n           class=\"sw-btn-primary\">Send my product spec &rarr;<\/a>\n      <\/div>\n    <\/div>\n  <\/section>\n\n<script type=\"application\/ld+json\">\n  [\n    {\n      \"@context\": \"https:\/\/schema.org\",\n      \"@type\": \"BreadcrumbList\",\n      \"itemListElement\": [\n        {\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.shengweimachine.com\/\"},\n        {\"@type\":\"ListItem\",\"position\":2,\"name\":\"Buying Guides\",\"item\":\"https:\/\/www.shengweimachine.com\/buying-guides\/\"},\n        {\"@type\":\"ListItem\",\"position\":3,\"name\":\"Multi-Head Weigher vs Auger vs Volumetric Cup\",\"item\":\"https:\/\/www.shengweimachine.com\/multi-head-weigher-vs-auger-filler\/\"}\n      ]\n    },\n    {\n      \"@context\": \"https:\/\/schema.org\",\n      \"@type\": \"Article\",\n      \"headline\": \"Multi-Head Weigher vs Auger Filler vs Volumetric Cup: The Dosing Accuracy & Give-Away Guide\",\n      \"description\": \"Multi-head weigher, auger, or volumetric cup? An engineering and give-away-cost comparison of the three dry-solid dosing methods \u2014 accuracy mechanism, cleaning, failure modes, and 5-year total cost.\",\n      \"image\": \"https:\/\/www.shengweimachine.com\/wp-content\/uploads\/2026\/06\/dosing-methods-hero.webp\",\n      \"datePublished\": \"2026-06-09\",\n      \"dateModified\": \"2026-06-09\",\n      \"author\": {\n        \"@type\": \"Person\",\n        \"name\": \"Hellena Ji\",\n        \"jobTitle\": \"International Sales Manager\",\n        \"worksFor\": {\"@type\":\"Organization\",\"name\":\"ShengWei Machine\"},\n        \"sameAs\": \"https:\/\/www.shengweimachine.com\/about-us\/\"\n      },\n      \"publisher\": {\n        \"@type\": \"Organization\",\n        \"name\": \"ShengWei Machine\",\n        \"url\": \"https:\/\/www.shengweimachine.com\/\",\n        \"logo\": {\"@type\":\"ImageObject\",\"url\":\"https:\/\/www.shengweimachine.com\/wp-content\/uploads\/2023\/09\/Shengwei-Machinery-Logo-w1084-h100.webp\"}\n      },\n      \"mainEntityOfPage\": {\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.shengweimachine.com\/multi-head-weigher-vs-auger-filler\/\"},\n      \"inLanguage\": \"en-US\"\n    },\n    {\n      \"@context\": \"https:\/\/schema.org\",\n      \"@type\": \"FAQPage\",\n      \"mainEntity\": [\n        {\"@type\":\"Question\",\"name\":\"What is the real difference between a multi-head weigher, an auger filler, and a volumetric cup filler?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"They differ in how they measure a dose. A multi-head weigher is gravimetric \u2014 it weighs product in many hoppers and selects the combination closest to target. An auger filler is semi-volumetric \u2014 it meters by counting screw rotations, so the weight depends on bulk density. A volumetric cup is pure volumetric \u2014 it fills a fixed cup volume, so the weight is volume times density. That measurement difference, not build quality, sets the accuracy order. For which method your specific product points to, see the dosing section of our Choosing Guide.\"}},\n        {\"@type\":\"Question\",\"name\":\"Why is a multi-head weigher more accurate than an auger or cup?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Because it measures mass directly. The dose weight is read off load cells rather than calculated from the product's bulk density, so a change in density \u2014 from compaction, moisture, or particle size \u2014 does not directly throw off the fill. Augers and cups meter a volume and rely on density to convert it to weight, so when density drifts, the weight drifts with it unless a downstream checkweigher closes the loop.\"}},\n        {\"@type\":\"Question\",\"name\":\"Does adding more weigh heads always improve accuracy?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Up to a point. More heads mean more weight combinations to choose from \u2014 10 heads give 1,023, 14 give 16,383 \u2014 so the machine can land closer to target with less give-away. But the benefit flattens around 14 heads on a single-product line, because the product's settling time and the evenness of the infeed start to limit the cycle more than statistics do. Very high head counts are mainly for multi-product mixing rather than single-SKU precision.\"}},\n        {\"@type\":\"Question\",\"name\":\"How does dosing accuracy translate into money?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Net-content law requires the average pack to meet the declared weight, so a packer must aim above the label by a buffer sized to the filler's variation. Tighter dosing means a smaller buffer and less product given away on every pack. The effect scales: one peer-reviewed analysis put a 1% cut in overfill at roughly $500,000 a year for a processor running about a million packages a week at a product value near $1 per pound. The figure moves with your volume and product value, but the direction is always the same.\"}},\n        {\"@type\":\"Question\",\"name\":\"Can a cheaper volumetric filler hit the same accuracy as a weigher?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"On uniform, free-flowing product, often yes \u2014 by adding a downstream checkweigher in a closed loop. The checkweigher tracks the running average and feeds a correction back to the filler, trimming auger revolutions or cup volume on the fly to cancel slow density drift. This delivers its biggest return on the two volumetric methods, which is why a servo cup or auger plus a feedback checkweigher is frequently the most cost-effective route rather than jumping straight to a premium weigher.\"}},\n        {\"@type\":\"Question\",\"name\":\"Which dosing method is hardest and easiest to clean and change over?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A volumetric cup is the easiest and fastest \u2014 retune the cup volume or swap the cup set, often tool-free in minutes. An auger is the heaviest teardown, because the screw and tube come out for a wet wash and cohesive powder packs into the clearances. A multi-head weigher has the most product-contact parts, but hygienic models lift the hoppers off without tools, and many plants keep a duplicate hopper set to swap clean-for-dirty and minimise downtime.\"}},\n        {\"@type\":\"Question\",\"name\":\"What are the most common dosing failures by method?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Augers suffer bridging and ratholing in the hopper, weight drift as head pressure falls, and flooding when the product is too free-flowing. Multi-head weighers suffer bucket bounce at speed, static cling on dry or oily product, and zero drift after a careless reassembly. Volumetric cups suffer compaction drift, aeration error at high speed, and dust settling into the seal zone and causing leaking bags. Naming the ones relevant to your product in the RFQ gets the right counter-measures specified up front.\"}},\n        {\"@type\":\"Question\",\"name\":\"Is a multi-head weigher worth the higher price?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It depends on your product value and volume. In our illustrative high-value coffee model, the give-away savings from tighter dosing can exceed the machine-price gap within the first production year \u2014 a derived-calculation from stated inputs, not a universal promise. On a low-value, stable commodity, where give-away is cheap, a cup or auger usually wins. The test is simple: multiply your expected give-away gap by product value and annual volume, then compare it to the machine-price difference.\"}},\n        {\"@type\":\"Question\",\"name\":\"What lead time should I expect on a dosing system from China?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"ShengWei base models \u2014 standard configurations of our collar-type fillers in multi-head, auger, linear-weigher, and cup versions \u2014 ship in 15\u201320 days ex-works. Custom multi-lane builds and complete integrated lines run longer; confirm scope in the RFQ. Add four to six weeks of ocean transit when comparing ex-works against delivered quotes, and budget the checkweigher and any dust-control hardware as line items rather than afterthoughts.\"}}\n      ]\n    }\n  ]\n  <\/script>\n\n  <div id=\"dosingLightboxOverlay\" class=\"sw-lightbox\" onclick=\"dosingCloseLightbox(event)\" role=\"dialog\" aria-modal=\"true\" aria-label=\"Enlarged figure\" aria-hidden=\"true\">\n    <img class=\"sw-lightbox__img\" alt=\"\" id=\"dosingLightboxImg\">\n    <button type=\"button\" class=\"sw-lightbox__close\" onclick=\"dosingCloseLightbox(event)\" aria-label=\"Close enlarged figure\">&times;<\/button>\n    <div class=\"sw-lightbox__caption\" id=\"dosingLightboxCap\"><\/div>\n  <\/div>\n\n  <script>\n  (function(){\n    var overlay = document.getElementById('dosingLightboxOverlay');\n    if (!overlay) return;\n    var img = document.getElementById('dosingLightboxImg');\n    var cap = document.getElementById('dosingLightboxCap');\n\n    function openFig(figure){\n      var i = figure.querySelector('img');\n      if (!i) return;\n      img.src = i.currentSrc || i.src;\n      img.alt = i.alt || '';\n      var c = figure.querySelector('figcaption');\n      cap.textContent = c ? c.textContent.trim() : '';\n      overlay.classList.add('is-open');\n      overlay.setAttribute('aria-hidden', 'false');\n      document.body.style.overflow = 'hidden';\n    }\n    function closeFig(){\n      overlay.classList.remove('is-open');\n      overlay.setAttribute('aria-hidden', 'true');\n      document.body.style.overflow = '';\n    }\n\n    document.querySelectorAll('.sw-figure-zoom').forEach(function(fig){\n      fig.addEventListener('click', function(e){\n        if (e.target.closest('a')) return;\n        e.preventDefault();\n        openFig(fig);\n      });\n    });\n\n    window.dosingCloseLightbox = function(e){\n      if (e && e.target && e.target.tagName === 'IMG' && e.target.id === 'dosingLightboxImg') return;\n      closeFig();\n    };\n\n    document.addEventListener('keydown', function(e){\n      if (e.key === 'Escape' && overlay.classList.contains('is-open')) closeFig();\n    });\n  })();\n  <\/script>\n\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":3243,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3250","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.shengweimachine.com\/zh\/wp-json\/wp\/v2\/pages\/3250","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.shengweimachine.com\/zh\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.shengweimachine.com\/zh\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.shengweimachine.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.shengweimachine.com\/zh\/wp-json\/wp\/v2\/comments?post=3250"}],"version-history":[{"count":1,"href":"https:\/\/www.shengweimachine.com\/zh\/wp-json\/wp\/v2\/pages\/3250\/revisions"}],"predecessor-version":[{"id":3251,"href":"https:\/\/www.shengweimachine.com\/zh\/wp-json\/wp\/v2\/pages\/3250\/revisions\/3251"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.shengweimachine.com\/zh\/wp-json\/wp\/v2\/media\/3243"}],"wp:attachment":[{"href":"https:\/\/www.shengweimachine.com\/zh\/wp-json\/wp\/v2\/media?parent=3250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}