CN3D Shrinkage Test
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This isn't just another calibration print. It was designed specifically for the free CN3D Shrinkage Calculator
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CN3D Shrinkage & Dimensional Accuracy Test
The final calibration step for truly dimensionally accurate prints.
This model was designed specifically for the free CN3D Shrinkage Calculator available at:
https://docs.cn3d.eu/en/calibration/shrinkage
Print the test, measure it with digital calipers, enter the value into the calculator and it will automatically calculate the shrinkage compensation required for your filament.
Available Sizes
150 mm | 200 mm ⭐ Recommended | 270 mm ⭐ Maximum Accuracy |
|---|---|---|
Recommended for smaller printers or when you simply want a quick calibration. | The best balance between printing time, material usage and measurement accuracy. For most users this is the version we recommend printing. | Recommended whenever your printer has enough build volume. A longer reference dramatically reduces measurement error, making it the most accurate version for calibrating dimensional shrinkage—especially if you regularly print large functional parts. |
Why is the model printed at 45°?
Every major slicer applies XY Scaling equally to both X and Y axes.
Printing the bar at 45 degrees means the measured shrinkage is influenced equally by both axes, allowing the calculator to determine the correct compensation for the XY scale used by your slicer.
This makes the result representative of your printer's real dimensional behavior instead of measuring only a single axis.
Recommended Print Settings
Print this model using the same settings you normally use for functional parts.
For best results we recommend:
4 Perimeters
5 Top Layers
5 Bottom Layers
20% Infill
The goal is not to produce the prettiest print, but to reproduce the exact conditions under which your real parts are printed.
Measurement Tips
Use good quality digital calipers.
Measure the full length of the bar.
Take multiple measurements and average them if necessary.
Avoid measuring immediately after printing—allow the part to cool completely first.
Calibration Order
For the best results, complete the previous calibration steps first.
Extruder Calibration
PID Tuning
Temperature
Maximum Flow
Pressure Advance
Flow Rate
Retraction
Skew & Squareness
Shrinkage ← You are here
Free Online Calculator
After printing the model, simply enter your measurements into the free CN3D Shrinkage Calculator on:
No formulas. No spreadsheets.
Just accurate shrinkage compensation for dimensionally accurate prints.