When ABS earns its trouble
ABS survives near-boiling heat, sands and acetone-smooths to a glossy finish, and makes genuinely tough functional parts. If none of that matters to your project, PETG gives most of the strength with a fraction of the hassle.
A warm, still chamber
ABS shrinks as it cools, and any draft turns shrinkage into warp. Print in still, warm air — a 40–50°C chamber is ideal. A cardboard box over the printer works as a starter enclosure; keep air-conditioner vents and windows away from the machine.
Settings that work
- Nozzle: 240–260°C (start at 250°C)
- Bed: 90–110°C
- Chamber: as warm and still as you can manage
- Cooling fan: off, or up to 20% only on tiny features and bridges
- Brim: 8–10mm on anything with corners; raft for tiny footprints
- First layers slow (20–30 mm/s), ABS slurry or glue on PEI and glass
Dry it before you tune it
ABS absorbs moisture too: wet rolls pop and string, and no setting fixes that. Dry at 60°C for 6–8 hours, and in humid months keep the spool sealed with desiccant between prints — full routine in drying and storage.
Fumes and safety, honestly
ABS emits styrene fumes — ventilate the room, never print ABS in a bedroom, and keep children and pets out during long prints. An enclosure with a cracked window nearby, or a simple exhaust filter, handles it. This is the one filament where safety thinking applies.
Warping rescue
Corners lifting mid-print? Add brim, raise the bed 5°C, kill every draft, and slow down. The full warping playbook: warping and first-layer fixes.