PLA/PETG Supports Test - Clean Overhangs

The secret to achieving clean overhangs and avoiding tedious sanding is to use incompatible materials. Since PLA and PETG do not adhere to each other once cooled, they form the ideal combination for the support interface layer.

I have designed this resource with 4 calibration plates for you to fine-tune your profiles:

1. Complex PLA Test - PETG Interface
2. Simple PLA Test - PETG Interface
3. Complex PETG Test - PLA Interface
4. Simple PETG Test - PLA Interface

⚙️ Recommended technical settings:

• Contact Z distance: 0 mm. As the materials are incompatible, the part is printed directly on the support without sticking.
• Interface layers: Set between 2 and 3 layers.
• Purge volume: It is vital to increase it significantly to prevent secondary filament remnants from contaminating the main part's structure.

Hardware note: While this method is excellent for systems like the AMS, if you are looking for the most efficient alternative on the market to avoid massive purges and save time, the Bambu Lab H2C with its real dual extruder system is currently the superior option.

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