Material
PETG
Printer
Bambu P1S

Short answer

The Bambu P1S prints PETG at a 240 to 250 C nozzle and a 70 to 90 C bed, with low part cooling and a short direct-drive retraction. The P1S is fast and all-metal, so it handles PETG clean, but PETG strings when wet, so dry the spool first. Run it from the AMS or a dryer and these numbers give a good first print.

Starting PETG settings for the P1S

These numbers suit a stock Bambu P1S with the direct-drive extruder. The nozzle and bed values track Bambu’s PETG guide and the Prusa and Polymaker PETG datasheets. The retraction and speed tuning are Marqilo starting points for the P1S. Dry the PETG first, since wet spools string on this fast printer.

Starting PETG settings for a Bambu P1S
SettingRecommendedWhy
Nozzle temp240 to 250 C240 C is a safe start; 250 C for faster speeds. PETG melts clean in this range.
Bed temp70 to 90 C80 C gives strong grip on the textured PEI; the Bambu sheet handles up to 90 C.
Retraction0.4 to 0.6 mmDirect-drive baseline. Tune within 0.4 to 0.6 mm for stringing.
Part coolingOff, then 30 to 50%Off for the first 2 to 3 layers, then 30 to 50 percent. PETG weakens under full cooling.
First layer240 C, 80 C bed, 20 mm/sSlow and warm, so the PETG bonds to the sheet.
Print speed80 to 200 mm/sMarqilo starting point. The P1S prints PETG fast; slow the outer walls for finish.

How to adjust PETG settings

  1. Dry the PETG

    Run the spool at 60 to 65 C for 4 to 8 hours in a dryer, then print from the AMS or dryer.

  2. Set the temperatures

    Nozzle to 240 C and bed to 80 C is a safe start that melts PETG clean on the P1S.

  3. Keep cooling low

    Run the part fan off for the first 2 to 3 layers, then 30 to 50 percent. Full cooling weakens PETG.

  4. Tune retraction

    Start at 0.5 mm. If strings appear, step toward 0.6 mm until they clear.

What goes wrong

Most failed PETG prints on the P1S trace to wet filament and too much cooling. Wet PETG pops, strings, and prints cloudy, so dry the spool. Full part cooling weakens the layers, so keep it at 30 to 50 percent. A nozzle too cool under-extrudes at speed, which clears when you lift it toward 250 C. The PETG stringing guide covers the hairs in depth.

Frequently asked

What PETG nozzle temp for the Bambu P1S?
240 to 250 C. Start at 240 C and move to 250 C at higher speeds. The all-metal hot end on the P1S handles the full PETG range.
Does the P1S need glue for PETG?
On the textured PEI sheet, usually not. PETG grips it well. A thin glue-stick layer on smooth PEI works as a release agent so the print does not chip the sheet.
Can the AMS dry and print PETG?
Print PETG from a dryer or a freshly dried spool. The AMS feeds it fine, but PETG re-wets fast, so keep unused spools sealed with desiccant.

For the material side, the PETG hub explains the filament in depth, and the filament storage guide covers keeping spools dry.

Related guides

Related

Cross-reference

Sources & methodology

5 citations · reviewed 2026-07-10
  1. 01Bambu Lab PETG Usage Guide (wiki): PETG drying and flowaccessed 2026-06-29Tier 1
  2. 02Bambu Lab Wiki: Printing wet or undried PETG (drying)accessed 2026-07-09Tier 1
  3. 03Bambu Studio Wiki: print and material settingsaccessed 2026-06-29Tier 1
  4. 04Prusament PETG Technical Datasheet (TDS PDF): nozzle, bed, fan, speedaccessed 2026-06-29Tier 1
  5. 05Polymaker PETG Technical Data Sheet (TDS V2.0 PDF): nozzle, bed, dryingaccessed 2026-06-29Tier 1
How we vetted this: every claim traces to a tiered source, Tier 1 (manufacturer, slicer, standards) first. Read the full sourcing and conflict-of-interest policy.