Glass Fiber PETG

Bambu Lab P1 Series General Discussions
1

Has anyone else had any experience using Glass Fiber PETG?

I am trying to eliminate the bumps and blobs on the top surface:

signal-2024-08-31-120933_002
signal-2024-08-31-120933_0022048×1152 491 KB

signal-2024-08-31-120930_002
signal-2024-08-31-120930_0022048×1152 344 KB

Using my ultra slow PETG profile (40mm/s)
250 degrees
5 wall loops
5 top and bottom shell layers
15% Gyroid infill and also tried 15% Cross Hatch

I also tried using my ironing calibration test… that clogged the extruder and nozzle (by the time it hit the 35% flow rate) so bad it was the worst clog I’ve ever encountered. Had to completely disassemble the whole extruder assembly (all 8 screws) and heat the nozzle up to 300 to push the clog out the top with a needle. None of the ironing that printed looked all that good, so I gave up on the ironing.
I’d be happy to just eliminate the bump on the surface.

It makes great strong parts… just trying to pretty them up a little bit more.

Here’s what I am using: Amazon.com

1 Like
2

Most likely cause my the built-up filament around the nozzle with PETG. Then that clump fall onto the model and makes a mess.

I have watched this happened on my prints… I had to babysit and pause to remove the built-up around the nozzle with my tweezer.

I just wish the printer has a logic that at every X layers, do nozzle wipe.

3

The bubbles looks like bridging sag underneath and the nature of PETG balling up making it worse. I’d be inclined to speed up the print a little and change the top surface to Monotonic line or similar to get a more uniform look (turn the model to get a more appealing angle).

4

Well it’s got “meh” ratings with most people saying it’s difficult to work with. I’ve never used PETG-GF but I’ve used PETG and ABS-GF and I’ve mostly seen issues when wet.

5

Oh this is pretty interesting, never tried anything like it