Poor bed adhesion causes first-layer peeling, rounded corner lifting (warping), or catastrophic print detachment where the nozzle drags a bird's nest of plastic across the plate.
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| material | bedType | bedTemp | lineHeight | lineWidth |
|---|---|---|---|---|
| PLA | Textured PEI / Smooth | 55°C – 65°C | 0.24 mm (Initial) | 120% (0.48 mm on 0.4mm nozzle) |
| PETG | Textured PEI (Avoid bare smooth) | 75°C – 85°C | 0.24 mm | 115% (Initial Layer) |
| ABS / ASA | Textured PEI (Enclosure required) | 100°C – 110°C | 0.20 mm | 120% + Brim (5mm) |
| TPU | Textured PEI / Painter's Tape | 40°C – 50°C | 0.24 mm | 100% (Slow 15mm/s) |
Fingerprint oils completely destroy PEI adhesion. Wiping with alcohol sometimes merely smears grease. Wash with standard dish soap (Dawn / Fairy), rinse with hot water, and dry with a clean paper towel.
The first layer filament must be squished flat into a continuous ribbon without visible valleys between extrusion lines. If lines are round like spaghetti, lower Z-offset by -0.02mm.
In OrcaSlicer, Bambu Studio, or Cura, set Initial Layer Line Width to 0.50mm (for a 0.4mm nozzle) and Initial Layer Speed to 20mm/s. Wider tracks dramatically increase surface contact area.
For sharp-cornered boxes, boxes in PETG or ABS, cooling thermal contraction pulls the corners upward. A 5mm brim mechanically locks the boundary to the plate.
Thermal contraction. As upper layers cool from 200°C down to room temperature, they contract and exert tensile leverage on the bottom corners. Keep drafts away, turn off the part cooling fan for the first 3 layers, and slightly raise the heated bed by 5°C.
90% of the time, the nozzle is too far from the bed. Perform a paper test leveling on all 4 corners with bed heated to 60°C, then adjust Z-probe offset during print skirt calibration.
Quick-reference card with exact speed, flow rate, volumetric limits, and temperatures for OrcaSlicer, Bambu Studio, and Cura.
