Orient the print with the X arrow along your printer's X axis before slicing. Arm numbers 1 to 4 match the recessed digits on the print and the rows below.
Use calipers to measure each specified dimension 3 times and enter the measured values below. If the error % between measurements is too high, check that the correct dimension is being measured.
The calibration will result in a single Shrinkage % to paste into Bambu Studio → Filament Settings → Basic Information → Shrinkage. Complete this for each unique filament brand and type. Shrinkage should not vary much between filament colors of the same brand and type.
Optional Setup
Existing calibration (optional)
Leave this blank the first time you calibrate. If you already applied a Shrinkage value and are printing ShrinkStar again to refine it, enter that value here. The new readings below will be treated as the residual error after that compensation, and the result will be the new combined value to replace it with (not to add to it).
Printer and filament (optional, used in the shareable summary)
Outside jaws on opposite arm tips. Design value 100.00mm.
| Location | Design | R1 | R2 | R3 | Avg | Error | Status |
|---|
Outside jaws on opposite arm shoulders. Design value 50.00mm.
| Location | Design | R1 | R2 | R3 | Avg | Error | Status |
|---|
Outside jaws on opposite hub faces. Design value 30.00mm.
| Location | Design | R1 | R2 | R3 | Avg | Error | Status |
|---|
Inside jaws, reaching into each arm's slot individually: four independent readings, not shared between arms. Design value 17.00mm.
| Location | Design | R1 | R2 | R3 | Avg | Error | Status |
|---|
Diagnostics
Summary
| X outer average error | - |
| Y outer average error | - |
| X vs Y difference | - |
| Size-linearity spread (100/50/30mm) | - |
| Outer vs inner difference | - |
| Final Bambu Shrinkage value | - |
The Shrinkage value below is calculated from the Outer-100/50/30 readings only, since that is the only thing Bambu's Shrinkage setting actually scales. Inner-17 is not part of that calculation, but is compared against the outer readings below as a check for extrusion bias.
Share
Copy for MakerWorld
Once your readings are in, this box fills in automatically. Paste it as a comment on the ShrinkStar MakerWorld page to help build a crowd-sourced shrinkage database by printer and filament.