PETG Basic on Bambu Lab H2D

Nozzle Temp

235 °C

Range: 220 – 240 °C

Bed Temp

70 °C

Range: 70 – 80 °C

Print Speed

80

mm/s · max 120

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

230 – 240 °C

220 – 240 °C

Bed Temperature

70 – 80 °C

70 – 80 °C

Print Speed

60 – 120 mm/s

data sheet: 40 – 250 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 Basic comes on a slimmer spool that some AMS units do not recognise during automatic loading. Move it onto an AMS-compatible reusable spool, or feed it from the external spool holder.

PETG bonds very strongly to smooth PEI. Print on the Textured PEI Plate, or use a thin layer of glue stick as a release layer on smooth PEI.

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.

Bambu Lab's filament guide lists 240 – 270 °C for PETG, above OzFDM PETG Basic's 220 – 240 °C range, so change the nozzle temperature before slicing. A heat deflection temperature of 74 °C suits parts that sit somewhere warm.

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

Stringing and blobs: Dry the roll at 70 °C for 5 h first, then drop the nozzle to 230 °C. Tune retraction last.

First layer too squashed or rough: Slow the first layer to 15 mm/s and check the plate type selected in Bambu Studio matches the plate fitted, since bed temperature is set per plate type.

Parts split between layers under load: Cooling is too high. Drop the fan to 30 % and raise the nozzle 5 °C, staying at or below 240 °C.