6-Minute Cardboard Spool Rim Protector (AMS Friendly)

Stop cardboard debris from clogging your AMS! This ultra-minimalist spool ring gives cardboard spools a smooth, hard plastic surface to ride on, preventing "dust" from shedding into your internal gears and rollers.

This is the fastest and lightest rim protector available, designed for those who want AMS compatibility without wasting time or filament.

Why this design?

• Ultra-Fast: Prints in under 6 minutes.
• Minimalist: Uses only 4g of filament. Equip your entire collection for pennies.
• AMS Safe: Provides a hard surface for the rollers to grip, saving your AMS from cardboard wear.
• Low Profile: Thin enough to ensure the AMS lid closes without interference.

Compatibility

I have specifically tested and confirmed the fit for:

• Overture (Cardboard Spools)
• Elegoo (Cardboard Spools)

While it likely works on other brands with standard 200mm diameter, please note that cardboard spool thicknesses can vary slightly between manufacturers.

Print Recommendations

• Material: PLA for general use; PETG if you plan to use the spool inside a heated dryer.
• Orientation: Print flat on the bed. No supports required.

I have updated to include other sizes to account for variances in spool diameters & filament shrinkage. 200mm is standard