How do you calculate UV cure system throughput?

Multiply parts per belt foot by belt speed in feet per minute, then by 60 to get gross parts per hour. With 2 parts/ft at 30 ft/min that is 60 parts/hr nameplate. Then multiply by uptime and cure yield: 60 x 0.85 x 0.97 gives 49.47 net good cured parts per hour.

Why is my actual throughput lower than the nameplate rating?

Nameplate is gross throughput at full belt loading and continuous running. In the worked example, 85% uptime removes 9 parts/hr and a 97% cure yield removes another 1.53 parts/hr, so 60 nameplate becomes 49.47 net. Loading gaps, lamp warm-up, and cure rejects all live in that gap.

What is a good cure-related yield for a UV line?

Mature UV coating and ink lines typically run 97-99.5% cure yield once dwell time and lamp dose are dialed in. Below about 95% you usually have a dose problem (belt too fast or lamps aged), oxygen inhibition on the surface, or shadowed geometry the UV cannot reach.

How do I increase net throughput without buying a faster line?

Loading density and uptime move the number more than belt speed because raising speed can drop you below the minimum cure dose. Going from 2 to 3 parts per belt foot, or lifting uptime from 85% to 92%, both add real parts without risking under-cure.

Belt speed vs cure yield: which should I prioritize?

They trade off directly. Faster belt speed raises gross throughput but cuts the UV dose each part receives, which lowers cure yield. Find the highest speed that still delivers full cure for your worst-case geometry, then stop. Speed past that point produces more parts but fewer good ones.

Does this account for lamp aging?

Not directly. Lamp output drops over thousands of hours, which lowers delivered dose and shows up as falling cure yield. Re-run the calculator with a lower yield figure as lamps age, and use the result as a trigger to schedule lamp replacement before rejects spike.

UV Curing calculator

UV System Throughput Calculator

UV Cure System Throughput is the real number of fully cured, in-spec parts a UV curing conveyor produces per hour after you account for downtime and cure-related rejects. Process engineers and line supervisors running UV-cured coatings, inks, or adhesives use it to size a line against a production order and to separate nameplate capacity from what the line actually ships. It matters because a UV conveyor is rarely the bottleneck on its catalog rating — belt loading density, real uptime, and the share of parts that come off under-cured or over-cured quietly erode the number you can promise. Knowing the net figure stops you from over-committing on quotes and exposes where a small uptime or yield gain pays back fastest.

What this calculator does

Project good cured parts per hour from belt speed, parts pitch, line uptime, and cure-related yield - the realistic capacity, not nameplate.
Use it when sizing capacity for a new program, deciding whether a UV cell is the bottleneck, or answering 'how many can we ship per shift'.
It computes net good cured parts per hour by multiplying belt loading by belt speed to get gross throughput, then derating that by line uptime and cure-related yield.

Formula used

Gross throughput (parts/hr) = parts per belt foot × belt speed × 60
Net throughput = gross × uptime × cure yield

Inputs explained

Parts per belt foot: 1 ÷ pitch (in) × 12; e.g. parts on 6-in pitch = 2 parts / ft.
Belt speed: Production line speed at the cure station - verify with a tach.
Line uptime: Production hours ÷ scheduled hours after lamp warm-up, jams, breaks; 75-90% is common.
Cure-related yield: % of cured parts that pass downstream; 95-99% on stable UV processes.

How to use the result

Use it when scoping a UV curing line for a new job, validating whether existing equipment can hit a daily quota, or quantifying how much capacity downtime and cure rejects are costing you.
It assumes parts are loaded at a steady density across the full belt and that cure quality is captured in a single yield figure; it does not model lamp degradation over a shift, dwell-time-dependent cure depth, or thermal limits on heat-sensitive substrates.

Common questions

How do you calculate UV cure system throughput? Multiply parts per belt foot by belt speed in feet per minute, then by 60 to get gross parts per hour. With 2 parts/ft at 30 ft/min that is 60 parts/hr nameplate. Then multiply by uptime and cure yield: 60 x 0.85 x 0.97 gives 49.47 net good cured parts per hour.
Why is my actual throughput lower than the nameplate rating? Nameplate is gross throughput at full belt loading and continuous running. In the worked example, 85% uptime removes 9 parts/hr and a 97% cure yield removes another 1.53 parts/hr, so 60 nameplate becomes 49.47 net. Loading gaps, lamp warm-up, and cure rejects all live in that gap.
What is a good cure-related yield for a UV line? Mature UV coating and ink lines typically run 97-99.5% cure yield once dwell time and lamp dose are dialed in. Below about 95% you usually have a dose problem (belt too fast or lamps aged), oxygen inhibition on the surface, or shadowed geometry the UV cannot reach.
How do I increase net throughput without buying a faster line? Loading density and uptime move the number more than belt speed because raising speed can drop you below the minimum cure dose. Going from 2 to 3 parts per belt foot, or lifting uptime from 85% to 92%, both add real parts without risking under-cure.
Belt speed vs cure yield: which should I prioritize? They trade off directly. Faster belt speed raises gross throughput but cuts the UV dose each part receives, which lowers cure yield. Find the highest speed that still delivers full cure for your worst-case geometry, then stop. Speed past that point produces more parts but fewer good ones.

Last reviewed 2026-05-12.