UV Curing calculator
UV System Throughput Calculator: What Each Fix Returns
Turn belt loading and line speed into net good throughput. Enter parts per belt foot, speed, uptime and cure yield; the shortfall splits into three honest recovery figures.
What this calculator does
- Net good throughput from belt loading and speed, split into what fixing uptime and yield each return.
Formula used
- Gross throughput = parts per belt foot × belt speed × 60
- Net good parts per hour = gross × uptime × yield
- Recovered by fixing uptime alone = gross × (1 − uptime) × yield
- Recovered by fixing yield alone = gross × uptime × (1 − yield)
- Recovered only by fixing both = gross × (1 − uptime) × (1 − yield)
Inputs explained
- Parts per Belt Foot: Parts occupying one foot of belt at the spacing run.
- Belt Speed: Line speed; check it against the cure window.
- Line Uptime: Share of scheduled time the line actually runs.
- Cure-Related Yield: Share of parts passing cure, cure defects only.
How to use the result
- Best suited to ranking an uptime project against a yield one, estimating capacity from belt loading and speed, setting a realistic hourly rate for scheduling.
- Cannot tell whether the speed cures; an undercured line still reports throughput. Assumes uptime and yield are independent, when shared causes correlate them. Says nothing about where the line's bottleneck actually sits.
Common questions
- Why do the recovery figures not add to the loss? Uptime and yield multiply. Parts that would have been rejected during downtime are recovered only when both are fixed, so they belong to neither row alone.
- Which should I fix first? Compare each single-fix row against what fixing it costs. At typical numbers uptime is worth far more, but a marginal cure window can reverse the ranking.
- Does this page know whether parts cured? No. Throughput arithmetic is indifferent to dose, so a belt above its cure window reports a higher number while every part comes off undercured.
- What about rework? Not included. Some rejects return to good output through reprocessing at a cost carried on the rework page, and they must not be counted twice.
Last reviewed 2026-10-01.