Weighing, Dosing & Loss-in-Weight Feeding worked example
Hopper Refill Interval at 12% refill safety allowance: a worked example
Push refill safety allowance up to 12% and the picture changes. This example computes every intermediate figure at that operating point. Use it when hopper refill interval in weighing, dosing and loss-in-weight feeding is changing rate or allowance and you want to see the impact.
The inputs for this scenario
- Usable hopper charge: 120 kg (unchanged)
- Feeder throughput: 12 kg / hr (unchanged)
- Refill safety allowance: 12 % (raised for this scenario; the documented default is 10)
Working through the calculation
- Applying the documented formula (Base hopper refill interval time = required work รท processing rate) to the inputs above produces each figure below.
- At this operating point the engine returns 11.2 hr for adjusted run time, the number this scenario is built around.
- At this operating point the engine returns 10 hr for base run time.
- At this operating point the engine returns 12 % for allowance applied.
- At this operating point the engine returns 12 pieces / min for process rate.
How this compares with the baseline
- Against the tool's baseline example, where refill safety allowance sits at 10% and the headline result is 11 hr, this scenario comes in 1.82% above the baseline at 11.2 hr.
- It computes the base run time as usable charge divided by throughput, then extends it by a safety allowance factor to give an adjusted refill interval. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.
Results at a glance
- Adjusted run time: 11.2 hr (headline result)
- Base run time: 10 hr
- Allowance applied: 12 %
- Process rate: 12 pieces / min
Run it with your numbers
- Every input above is editable in the live Hopper Refill Interval calculator, which recalculates instantly and can be shared with the inputs intact.
Last reviewed 2026-05-12.