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ABS settings for the Prusa MINI+

⚠ Possible with tweaks Advanced Engineering

These are hardware-tuned starting settings for printing ABS on the Prusa MINI+. The Prusa MINI+ pairs a Bowden extruder with an all-metal hotend on an open frame, and tops out at 280°C hotend / 100°C bed. Against ABS's ideal range (230–255°C), that lands us at 245°C nozzle and 100°C bed. ABS warps badly without an enclosure and needs ventilation because of fumes.

Quick answer: 245°C nozzle · 100°C bed · 50 mm/s · 6 mm retraction · 0% part fan. Change one setting at a time and validate with a small calibration model.
245°
Hotend
100°
Bed
50
mm/s
0%
Part fan

Recommended ABS profile

Hotend temperature245°C (tower 230–255°C)
Bed temperature100°C
Print speed50 mm/s
Retraction6 mm (Bowden)
Part cooling fan0%
Bed adhesionNeeds hot bed + enclosure; ABS slurry or glue helps.
NozzleBrass 0.4 mm is fine
First layer speed18–25 mm/s; same bed temp, verify Z offset
Flow / extrusion multiplierStart at 100%; calibrate flow before touching retraction
DryingDry if the spool pops, strings unusually, or the surface looks rough
⚠️ ABS warps without an enclosure and the Prusa MINI+ is open-frame. Block drafts, raise the bed temp, add a brim, and consider a simple enclosure for tall parts.
💡 Best uses for ABS: automotive, enclosures, heat-resistant parts. Estimate the material cost of your next ABS print with the filament cost calculator.

How ABS behaves

StrengthFlexibilityHeatEaseDurabilityDetail

ABS property profile

Strength 70
Flexibility 35
Heat resistance 75
Ease of printing 40
Durability 80

Calibration order

  1. Dry the spool if it shows moisture symptoms, then confirm the nozzle and build plate are clean.
  2. Print a temperature tower inside the 230–255°C range; pick the lowest temperature with strong layer bonding and clean overhangs.
  3. Calibrate flow, then pressure/linear advance if your firmware supports it.
  4. Tune retraction last — more distance is not always better, especially on the Bowden Prusa MINI+.

ABS brands & what to expect

ABS quality varies mostly in warp resistance and smell. Brand-name ABS (and ABS+ blends) warps less and off-gasses less than the cheapest spools, but every ABS needs a stable, warm chamber.

🔎 ABS fumes (styrene) genuinely need ventilation — print it enclosed and vented, not in a bedroom. The enclosure isn’t just for warp control; it’s a safety item.

Popular ABS brands: eSUN, Overture, Polymaker, Hatchbox.

Common ABS problems on the Prusa MINI+

SymptomLikely causeFix
Corners lift / layers splitChamber too cool or draftyEnclose, pre-warm, turn part cooling off, add a brim.
Cracking on tall partsUneven cooling in a big open frameKeep the enclosure closed for the whole print.
Strong smell / headachesPoor ventilationVent the enclosure outdoors or through a carbon filter.

On the Prusa MINI+ specifically: it is open-frame, so the warping fixes above are the ones that matter most — an enclosure or draft shield does more for ABS here than any slicer tweak.

ABS troubleshootingSymptoms, likely causes and a safe test orderCompare ABS across printersMaterial ranges and every per-printer profile

FAQ

What temperature should I print ABS on the Prusa MINI+?
Start at 245°C for the hotend and 100°C for the bed, then run a temperature tower across 230–255°C to dial in your exact filament brand. Our temperature tower planner builds the tower for you.
What print speed works for ABS on the Prusa MINI+?
Around 50 mm/s is a safe starting point. Check your real speed ceiling with the max volumetric flow calculator.
What retraction should I use for ABS?
Use about 6 mm of retraction (Bowden setups need more). If you see stringing with ABS, raise retraction speed before distance and dry the filament first.
Do I need an enclosure for ABS on the Prusa MINI+?
Yes — ABS really wants an enclosure and the Prusa MINI+ is open, so expect warping on large parts without one.
Do I need a hardened nozzle for ABS?
No. ABS is not abrasive, so the stock brass 0.4 mm nozzle on the Prusa MINI+ is fine.

Reviewed 2026-08-18. See how these starting settings are calculated. Numbers are conservative starting points, not lab measurements.