Hey, I developed my own transparent PetG print profile for unenclosed printers such as the P1P and A1 because the existing profiles online never quite worked for me. Below I will describe what I did but also why and what I learnt so that perhaps you could apply it to your own experiments.
building off this article and its reference: https://wiki.bambulab.com/en/knowledge-sharing/transparent-petg
Makerworld Link: https://makerworld.com/en/models/1482666-fast-transparent-solid-benchy#profileId-1548420
- I print with a .4mm nozzle at .2mm layer heights. While existing research suggests .1mm layers, that takes too long to be practical. Print times are too long and I don’t have a drybox to print out of, just a food dehydrator (which i don’t care to modify). To compensate for the increase in gaps i use a flow rate of 102%.
- To manage debris build-up over the layers of solid infill i use an acceleration value of 125mm/s2. This definitely does make a difference through my trial and error, to make sure the filament settles into the layer at the seams between wall and infill.
- To cool the filament slowly with an unenclosed printer I reduced print speed from 20mm/s to 15mm/s, and reduced temp down to 260C. If i didn’t reduce temperature as well it would introduce burning/bubbling and create more debris on solid infill layers. The print speed and temp may be possible to adjust more, but these values worked for me.
- To handle printing of parts with short layer times i used the following fan setup to minimal clouding effect
- I also dried my filament (Overture PetG) for at least 24 hrs as I occasionally still found bubbles at 8+ hours. A long while ago I dried it for 48 hrs and that also helped but I haven’t repeated this test to confirm whether that is true.
- Aligning the direction of solid infill had a big effect on transparency through the sides of the part and should be a key consideration with solid infill transparent printing.
I hope this helps anyone trying to reign in their profiles, also giving the object a clear coat spray can slightly help the transparency.
