this post was submitted on 13 Aug 2023
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Been using prusaslicers default PLA profile with issues and this is my first roll of PETG, so I just selected the corresponding profile for that.

It seems so be super stringy whenever there’s movement and when printing the bunny (in vase mode) there’s lots of holes in the model.

I’m not sure if this is an issue with calibration (didn’t do anything when switching from PLA) or if the filament is wet.

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[–] poofy_cat@lemm.ee 1 points 1 year ago* (last edited 1 year ago) (6 children)

Aside from drying, here are some thoughts:

Double-check the print temperature, PETG should be about 240-ish. Also the spiral vase mode may be the issue if your model isn't designed for it. Also check your z offset, the first layer should be almost a flawless sheet... if not, stop the print and try again while live adjusting the z until it's correct. Typically PETG doesn't like to be squished down as much as PLA.

[–] drudoo@lemmy.world 1 points 1 year ago (5 children)

Update: replaced the nozzle, heat block (heating element, sensor, PTFE) and fan duct. Did two new temp towers:

Left tower is 235 (top) to 260 (layers labeled 280-260 are all 260). Right is 220-240.

https://i.imgur.com/1MQkStE.jpg

https://i.imgur.com/HDWq19A.jpg

I definitely feel like 220 is the right temp for this.

I’ll try the bunny again, the model is designed for vase mode, so it should work!

[–] poofy_cat@lemm.ee 1 points 1 year ago

You could also mess with your retraction settings to try and reduce stringing.

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