PETG+ on Bambu Lab H2D

Nozzle Temp

225 °C

Range: 210 – 230 °C

Bed Temp

65 °C

Range: 50 – 70 °C

Print Speed

50

mm/s · max 60

Layer Height

0.20

mm · max 0.28

Fan Speed

40 %

1st layer: 0 %

1st Layer Speed

20

mm/s

Retraction

0.8 mm

@ 30 mm/s

Nozzle Type

Hardened

Stock 0.4 mm

Retraction Note

• PETG strings more than PLA. Raise retraction in 0.2 mm steps to no more than 1.2 mm, because too much retraction causes clogs.

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

data sheet: 40 – 60 mm/s

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)

30 – 50 %

–

Fan Speed (1st Layer)

0 %

–

Retraction Distance

0.8 mm

Direct drive, up to 1.2 mm

Retraction Speed

30 mm/s

–

Nozzle Type

Hardened steel (stock)

any 0.4 mm nozzle suits this material

Dry Filament

70 °C for 5 h

store sealed with desiccant between prints

Enclosure

Not required, chamber heating off

a hot chamber can soften PETG in the extruder

Support Material

PVA, PLA (interface)

–

Printing Notes

PETG+ is a modified PETG that prints cooler than standard PETG, at 210 – 230 °C with a 50 – 70 °C bed. Bambu Lab's filament guide lists 240 – 270 °C for PETG, so change the temperatures before slicing.

OzFDM lists 40 – 60 mm/s for PETG+. Lower the wall and infill speeds in Bambu Studio's process settings, or set a lower max volumetric speed in the filament preset.

PETG+ feeds smoothly through the AMS when kept dry. On smooth PEI, use a thin layer of glue stick as a release layer, because PETG can bond hard enough to damage the plate.

Leave chamber heating off. Bambu Lab groups PETG with the low-temperature filaments that can soften and clog in a hot chamber, so let the H2D run PETG with its chamber vented.

Slicer: Bambu Studio. Start from the Generic PETG filament preset and set the temperatures above. Every figure assumes dry filament, so dry at 70 °C for 5 h before a long print.

Troubleshooting

Fine strings across the print: Dry the roll at 70 °C for 5 h, then drop the nozzle to 220 °C. Only tune retraction once those two are ruled out.

Parts delaminate under load: Cooling is too high. Drop the fan to 30 % and raise the nozzle to 230 °C.

Part fused to a smooth PEI plate: Use glue stick as a release layer next time, or switch to the Textured PEI Plate.