Electronics Manufacturing worked example
Reflow Dwell Time at 5.75% carrier and loading allowance: a worked example
Push carrier and loading allowance up to 5.75% and the picture changes. This example computes every intermediate figure at that operating point. an SMT process engineer is checking a conveyor-speed or profile change
The inputs for this scenario
- Effective heated oven length: 240 in (unchanged)
- Conveyor speed: 32 in / min (unchanged)
- Carrier and loading allowance: 5.75 % (raised for this scenario; the documented default is 5)
Working through the calculation
- Applying the documented formula (Base oven dwell time = effective heated oven length รท conveyor speed) to the inputs above produces each figure below.
- At this operating point the engine returns 7.93 min for estimated reflow dwell time, the number this scenario is built around.
- At this operating point the engine returns 7.5 min for base oven dwell time.
- At this operating point the engine returns 5.75 % for carrier and loading allowance.
- At this operating point the engine returns 32 in / min for conveyor speed.
How this compares with the baseline
- Against the tool's baseline example, where carrier and loading allowance sits at 5% and the headline result is 7.88 min, this scenario comes in 0.71% above the baseline at 7.93 min.
- It estimates total reflow dwell time by dividing the heated oven length by conveyor speed and adding a carrier and loading allowance. 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
- Estimated reflow dwell time: 7.93 min (headline result)
- Base oven dwell time: 7.5 min
- Carrier and loading allowance: 5.75 %
- Conveyor speed: 32 in / min
Run it with your numbers
- Every input above is editable in the live Reflow Dwell Time calculator, which recalculates instantly and can be shared with the inputs intact.
Last reviewed 2026-05-12.