UV Curing worked example

UV Batch Cure Fixture Capacity at 58% uv cell uptime: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop uv cell uptime to 58%, then walk the calculation through step by step. Project parts per hour from a batch UV cure fixture (jig + lamp + cycle) given parts per fixture, cycles per hour, uptime, and yield.

The inputs for this scenario

  • Parts loaded per cure fixture: 8 parts / cycle (held at the documented default)
  • Completed cure cycles per hour: 20 cycles / hr (held at the documented default)
  • UV cell uptime: 58 % (the input this scenario stresses; the baseline uses 80)
  • First-pass cure yield: 97 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross capacity = parts per fixture × cycles per hour.
  • Net good parts / hr works out to 90.02 good parts / hr (batch) at these inputs, and this is the headline figure for the scenario.
  • Gross fixture capacity / hr works out to 160 parts / hr at these inputs.
  • Loss to cell uptime works out to 67.2 parts / hr at these inputs.
  • Loss to cure rejects works out to 2.78 parts / hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where uv cell uptime sits at 80% and the headline result is 124 good parts / hr (batch), this scenario comes in 27.5% below the baseline at 90.02 good parts / hr (batch).
  • The practical read: the gap between this scenario and the baseline is entirely attributable to uv cell uptime, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It treats uptime and yield as steady averages; it does not model warm-up transients, lamp-aging drift, or a specific bad fixture that skews yield on one shift.

Results at a glance

  • Net good parts / hr: 90.02 good parts / hr (batch) (headline result)
  • Gross fixture capacity / hr: 160 parts / hr
  • Loss to cell uptime: 67.2 parts / hr
  • Loss to cure rejects: 2.78 parts / hr

Run it with your numbers

  • To rerun this with your own numbers, open the live UV Batch Cure Fixture Capacity calculator, set uv cell uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.