Weighing, Dosing & Loss-in-Weight Feeding worked example

Line Speed Matching at 65% feeder-to-line synchronization efficiency: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop feeder-to-line synchronization efficiency to 65%, then walk the calculation through step by step. Line Speed Matching converts your finished output and runtime into an effective line speed in feet per minute, then discounts it by the efficiency at which the loss-in-weight feeder stays synchronized with the downstream conveyor or extruder.

The inputs for this scenario

  • Finished linear feet produced this run: 1,200 units (held at the documented default)
  • Conveying line runtime: 8 hr (held at the documented default)
  • Feeder-to-line synchronization efficiency: 65 % (the input this scenario stresses; the baseline uses 90)

Working through the calculation

  • The calculation starts from the formula this tool documents: Raw line speed matching = completed output รท runtime.
  • Effective throughput works out to 97.5 ft / min at these inputs, and this is the headline figure for the scenario.
  • Raw throughput works out to 150 ft / min at these inputs.
  • Efficiency works out to 65 % at these inputs.
  • Runtime works out to 8 hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where feeder-to-line synchronization efficiency sits at 90% and the headline result is 135 ft / min, this scenario comes in 27.78% below the baseline at 97.5 ft / min.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to feeder-to-line synchronization efficiency, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes output and runtime share the same units of length and time; it does not model transient refill dips or the lag between a line-speed change and the feeder's gravimetric correction.

Results at a glance

  • Effective throughput: 97.5 ft / min (headline result)
  • Raw throughput: 150 ft / min
  • Efficiency: 65 %
  • Runtime: 8 hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Line Speed Matching calculator, set feeder-to-line synchronization efficiency to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.