PETG on Bambu Lab A1 Mini

Nozzle Temp

225 °C

Range: 210 – 230 °C

Bed Temp

70 °C

Range: 50 – 70 °C

Print Speed

45

mm/s · max 60

Layer Height

0.20

mm · max 0.28

Fan Speed

50 %

1st layer: 0 %

1st Layer Speed

20

mm/s

Retraction

1.0 mm

@ 30 mm/s

Nozzle Type

Brass

Standard

  Retraction Note

• Increase to 1.2mm if stringing persists on the A1 mini.

Settings

Recommended

Range

Nozzle Temperature

220 – 230 °C

210 – 230 °C

Bed Temperature

60 – 70 °C

50 – 70 °C

Print Speed

40 – 60 mm/s

up to 60 mm/s on this printer

First Layer Speed

20 mm/s

slower is better for adhesion

Layer Height

0.16 – 0.24 mm

0.12 – 0.28 mm

Fan Speed (Normal)

40 – 60 %

–

Fan Speed (1st Layer)

0 %

–

Retraction Distance

1.0 mm

Direct drive

Retraction Speed

30 mm/s

–

Nozzle Type

Brass (standard)

Brass is fine; hardened optional

Dry Filament

70 °C for ≥ 5 h

print from a dry box in humid weather

Enclosure

Not required

Not required — helps in a cold or draughty room

Support Material

PVA, PLA (interface)

–

Printing Notes

PETG Basic shares its print window with OzFDM PETG+. It is the value option for functional parts that do not need the extra toughness.

Dry it. PETG Basic picks up moisture as readily as any PETG, and a damp roll is the single most common cause of a bad PETG print.

The A1 Mini is open-frame with an 80 °C bed ceiling, which limits it to low-warp materials — this profile stays inside that envelope.

Its lightweight direct-drive toolhead handles short retractions well, so there is no need for the long retracts a Bowden machine wants.

Slicer: Bambu Studio / OrcaSlicer. Dry the filament at 70 °C / ≥ 5 h before a long print — every figure above assumes dry filament.

Troubleshooting

Stringing and popping sounds while printing — Moisture. Dry at 70 °C for at least five hours and store with desiccant afterwards.

Poor bed adhesion despite a hot bed — Clean the sheet with IPA. PETG is sensitive to finger oils in a way PLA is not.

Prints stick to the bed too well and damage the sheet — Drop the bed to 60 °C and raise Z offset slightly. PETG bonds aggressively to smooth PEI.