First Layer Warping: Why It Happens and How to Stop It

## What Causes Warping? Warping happens when printed plastic cools unevenly and contracts, pulling the edges off the bed. It's most common with ABS, ASA, and large flat prints. ## Fix 1: Enclose Your Printer An enclosure traps heat and prevents drafts. ABS printed without an enclosure almost always warps. The Bambu P1S and X1C ship with full enclosures for this reason. DIY: drape a cardboard box or buy a fabric enclosure for open-frame printers. ## Fix 2: Increase Bed Temperature Push bed temperature to the maximum recommended for your material: - PLA: 65°C (higher doesn't usually help beyond this) - PETG: 85°C - ABS: 110°C - ASA: 110°C ## Fix 3: Add a Brim In your slicer, enable a brim of 8–15 mm. This extends the first layer contact area, anchoring the part. Bambu Studio: Support → Brim width. PrusaSlicer: Print Settings → Skirt and Brim → Brim width. ## Fix 4: Use the Right Bed Surface | Material | Best Surface | |----------|-------------| | PLA | PEI / textured PEI | | PETG | Smooth PEI or glass with glue | | ABS | Smooth PEI + glue or Garolite | | ASA | Smooth PEI + glue | ## Fix 5: Apply Adhesive A thin layer of Magigoo, Dimafix, or even regular glue stick dramatically improves bed adhesion for warping-prone materials. ## Fix 6: Print the First Layer Slower and Hotter Increase first layer nozzle temp by 5–10°C above your normal print temp. Lower speed to 20–30 mm/s. This improves bonding to the bed. ## Fix 7: Reduce Cooling Fan on First Layers Set first layer fan speed to 0%. The fan cools plastic too fast, causing it to contract and lift. Most slicers default to this — verify yours does too.