PETG Support Interface Test – PLA/PETG Separation Calibration

This test model helps you determine whether your PETG filament works effectively as a support interface (separation layer) when printing with PLA.

By printing this model, you can quickly evaluate:

• How well PETG prevents supports from bonding to PLA
• Ease of support removal
• Surface quality after separation
• Optimal interface settings in your slicer

How it works

The model is designed to simulate a typical support + interface scenario:

• Main structure printed in PLA
• Interface layers printed in PETG
• Allows direct comparison of adhesion and separation behavior

What to test

• Different interface layer counts
• Z-distance / contact distance
• Support density
• PETG brand/type compatibility

Recommended settings (starting point)

• Main material: PLA
• Support interface: PETG
• Interface layers: 2–4
• Z-distance: 0.0–0.1 mm
• No cooling changes required

Important notes

• PETG does not chemically bond well with PLA → ideal for support separation
• Results vary depending on filament brand and printer tuning
• Clean nozzle when switching materials to avoid contamination

Who is this for

• Multi-material users (AMS / MMU)
• Anyone printing clean PLA parts with supports
• Users looking to reduce post-processing effort

Goal

Find the perfect setup where:
→ Supports hold reliably during printing
→ But detach cleanly without damaging the model