Finishing worked example

Rack Density at 99% conveyor uptime: a worked example

What does the result look like when conveyor uptime reaches 99%? The full calculation is worked below with real intermediate numbers. Use this calculator for practical powder coating or surface finishing planning, quoting, troubleshooting, or line setup.

The inputs for this scenario

  • Parts hung per rack: 24 parts / cycle (unchanged)
  • Rack index cycles per hour: 18 cycles / hr (unchanged)
  • Conveyor uptime: 99 % (raised for this scenario; the documented default is 90)
  • First-pass coating yield: 97 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross capacity = positions/rate × cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 415 parts / rack for good output capacity, the number this scenario is built around.
  • At this operating point the engine returns 432 parts / rack for gross capacity.
  • At this operating point the engine returns 4.32 parts / rack for uptime loss.
  • At this operating point the engine returns 12.83 parts / rack for yield loss.

How this compares with the baseline

  • Against the tool's baseline example, where conveyor uptime sits at 90% and the headline result is 377 parts / rack, this scenario comes in 10% above the baseline at 415 parts / rack.
  • A figure at this level is achievable when conveyor uptime is genuinely sustained, not just peaked for a shift. It assumes uptime and yield are independent and constant; in practice packing parts denser to raise density often lowers first-pass yield through Faraday effects and contact marks, a trade-off the formula does not model.

Results at a glance

  • Good output capacity: 415 parts / rack (headline result)
  • Gross capacity: 432 parts / rack
  • Uptime loss: 4.32 parts / rack
  • Yield loss: 12.83 parts / rack

Run it with your numbers

  • Every input above is editable in the live Rack Density calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.