UV Curing worked example

UV Conveyor Belt Speed with required dose of 2,000 mJ / cm²: a worked example

What does the result look like when required dose reaches 2,000 mJ / cm²? The full calculation is worked below with real intermediate numbers. Use it when commissioning a new product on a UV conveyor or recovering after a lamp swap and you need a setpoint that hits the dose target without slowing the line more than necessary.

The inputs for this scenario

  • Required dose: 2,000 mJ / cm² (raised for this scenario; the documented default is 800)
  • Lamp cure-zone length: 10 in (unchanged)
  • Measured irradiance at belt: 1,200 mW / cm² (unchanged)

Working through the calculation

  • Applying the documented formula (Required dwell (sec) = required dose ÷ measured irradiance) to the inputs above produces each figure below.
  • At this operating point the engine returns 30 ft / min for belt speed setpoint, the number this scenario is built around.
  • At this operating point the engine returns 1.67 sec for required dwell under lamp.
  • At this operating point the engine returns 10 in for lamp cure-zone length.
  • At this operating point the engine returns 1,200 mW / cm² for measured irradiance.

How this compares with the baseline

  • Against the tool's baseline example, where required dose sits at 800 mJ / cm² and the headline result is 75 ft / min, this scenario comes in 60% below the baseline at 30 ft / min.
  • A figure at this level is achievable when required dose is genuinely sustained, not just peaked for a shift. It assumes a single uniform irradiance value across the cure zone and a flat part at belt height; it ignores spectral match (UVA/UVB/UVC weighting), reflector focus, part topography, and lamp warm-up, all of which change the real dose a 3D part receives.

Results at a glance

  • Belt speed setpoint: 30 ft / min (headline result)
  • Required dwell under lamp: 1.67 sec
  • Lamp cure-zone length: 10 in
  • Measured irradiance: 1,200 mW / cm²

Run it with your numbers

  • Every input above is editable in the live UV Conveyor Belt Speed calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.