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First time with PETG. Is this calibration, wetness or something else? (imgur.com)

submitted 1 year ago by drudoo to c/3dprinting

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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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[–] drudoo 2 points 1 year ago (1 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.

In regards to the fan, I actually read a post saying PETG wants almost no fan, so I just left it on default but maybe I should try a fixed fan speed.

I’m pretty sure the popping noise was clogged PLA burning like crazy at 260c…

[–] [email protected] 1 points 1 year ago (1 children)

I've always understood petg to really like cooling but I print in an enclosure so YMMV, it's absolutely awful for bridges without cooling. Another thing to check would be extrusion multiplier and retraction. I get nozzle buildup if it's overextruding which leads to blobs and stringing, worth tuning that anyhow

[–] drudoo 2 points 1 year ago

Been doing a couple of test prints with 30-80% variable fan speed and it’s actually pretty good looking with almost no stringing.

I unfortunately don’t have an enclosure, else I would for sure try and higher fan speed. Ad a slight draft this morning and my calibration cube print popped off half way through.