3D Printing Calculators
Resin Lift Speed and Distance
https://www.3dsizing.com/calculators/lift-speed-distance/
Estimate only — not firmware, a slicer profile or a shop quote. Confirm on a test print.
Resin Lift Speed and Distance
Large screens and thick resin need more peel distance and slower lifts or the print stays on the FEP. This is a shop heuristic from diagonal size (the marketing 10.1 inch class), viscosity and whether the FEP is new or tired.
Inputs
Results
- Lift distance
- 7.87mm
- Lift speed
- 130.7mm/min
- Retract speed
- 209.1mm/min
1.6× lift speed. Retract is usually faster than peel.
Calculation method
Lift distance starts at 5 mm and adds 0.7 mm for every inch of diagonal above 6 in. Lift speed starts from 220 mm/min at a 6 inch class screen and scales inversely with diagonal/6, then multiplies by viscosity (low 1.15, medium 1, high 0.75) and FEP condition (new 1, worn 0.85). Retract speed is 1.6 times lift speed. Diagonal stays a dimensionless inch size. Distance and speeds convert with the unit toggle (mm ↔ in, mm/min ↔ IPM).
Exact formula
lift_mm = 5 + max(0, diagonal_in − 6) × 0.7. lift_mm/min = (220 / (diagonal_in / 6)) × visc × fep. visc: low 1.15, med 1, high 0.75. fep: new 1, worn 0.85. retract = 1.6 × lift speed. Limits: Shop heuristic from marketing diagonal inches, not the vendor resin profile. Wait times after retract are not included.
Wait times still matter
Light-off and rest after retract let the resin settle. Speed numbers here do not include those dwells.
Frequently asked questions
Why isn’t diagonal converted?
Vendors sell 8.9 inch and 10.1 inch printers. That number is already inches. Converting it again would double-count.
Two-stage lift?
Many slicers peel slowly for a millimetre then speed up. Use this lift speed for the slow stage; the fast stage can be closer to retract.
High viscosity and a 13 inch screen.
Expect slow lifts and more distance. If the calculator still feels fast, it is a heuristic — drop speed until the raft releases cleanly.
nFEP vs FEP?
Smoother films can take a bit more speed. If you are unsure, leave FEP on new and test.
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