Short answer
The Bambu A1 prints PETG at a 230 to 260 °C nozzle, with 255 °C as Bambu’s default, and a 65 to 75 °C bed, with low part cooling and a short direct-drive retraction. The A1 is a fast bed-slinger with an auxiliary part-cooling fan, so it lays PETG down clean without an enclosure. The catch is moisture. PETG strings when wet, so dry the spool before you load it.
Starting PETG settings for the A1
These numbers suit a stock Bambu A1 with the direct-drive extruder and the stock 0.4 mm nozzle. The nozzle, bed, and drying values track the Bambu PETG Basic datasheet, with the Prusament and Polymaker PETG datasheets in agreement. The retraction baseline and the speed tuning are Marqilo starting points for the A1. Dry the PETG first, since a wet spool strings on this fast printer.
| Setting | Recommended | Why |
|---|---|---|
| Nozzle temp | 230 to 260 °C | Bambu's PETG Basic datasheet lists 230 to 260 °C and tests at 255 °C. Start near 250 on the A1 and step toward 255 at higher speeds. |
| Bed temp | 65 to 75 °C | Per the Bambu PETG Basic datasheet, tested at 70 °C. Bambu Studio default PETG profile runs 80 °C on textured PEI; 70 to 75 holds strong adhesion without over-shooting. |
| Retraction | 0.4 to 0.6 mm | Direct-drive baseline. Tune within 0.4 to 0.6 mm if you see stringing. |
| Part cooling | Off, then 30 to 50% | Run the fans off for the first 2 to 3 layers, then 30 to 50 percent. Full cooling weakens PETG layers. |
| First layer | 255 °C, 70 °C bed, 20 mm/s | Slow and warm, so the PETG bonds to the sheet before the bed moves at speed. |
| Print speed | 60 to 150 mm/s | Marqilo starting point. The A1 is quick, but keep the first layer and outer walls slower for finish. |
How to adjust PETG settings
Dry the PETG
Run the spool at 65 °C for 8 hours in a dryer, Bambu PETG Basic spec, then print straight from the dryer or the AMS.
Set the temperatures
Nozzle to 255 °C and bed to 70 °C is a safe start that melts PETG clean on the A1.
Keep cooling low
Run the part fans off for the first 2 to 3 layers, then set them to 30 to 50 percent. Full cooling weakens the layer bond.
Tune retraction
Start at 0.5 mm. If fine strings appear between moves, step toward 0.6 mm until they clear.
What goes wrong
Most failed PETG prints on the A1 trace to wet filament and too much cooling. Wet PETG pops, strings, and prints cloudy, so dry the spool first. Full part cooling from layer one weakens the layers, so hold it to 30 to 50 percent. A nozzle that is too cold under-extrudes at speed, which clears when you lift it toward 250 °C. The PETG stringing guide walks through the hairs in depth.
Frequently asked
What PETG nozzle temp for the Bambu A1?
Does the A1 need an enclosure for PETG?
Can the AMS print PETG on the A1?
For the material side, the PETG hub explains the filament in depth, and the filament storage guide covers keeping spools dry.
Related guides
Sources & methodology
6 citations · reviewed 2026-07-10- 01Bambu Lab PETG Usage Guide (wiki): PETG drying and flowaccessed 2026-06-29Tier 1
- 02Bambu Lab Wiki: Printing wet or undried PETG (drying)accessed 2026-07-09Tier 1
- 03Bambu Studio Wiki: print and material settingsaccessed 2026-06-29Tier 1
- 04Prusament PETG Technical Datasheet (TDS PDF): nozzle, bed, fan, speedaccessed 2026-06-29Tier 1
- 05Polymaker PETG Technical Data Sheet (TDS V2.0 PDF): nozzle, bed, dryingaccessed 2026-06-29Tier 1
- 06Bambu Lab PETG Basic Technical Data Sheet (TDS V3.0): nozzle 230 to 260 °C (default 255), bed 65 to 75 °C, drying 65 °C/8 haccessed 2026-07-10Tier 1