Printing with petg makes a clicking sound and under extrusion
I've had my prusa printer for a while now and had been printing a large project for about a week when a petg print failed (still finished the print as i was asleep) 3/4 of the way through(underextrusion brittleness and just being ugly lol). I thought nothing of it and reprinted it but this time it started under extruding immediately and I was able to stop it. I went and rescliced the model, didn't work, watched a ton of videos and read some forms that were related, didn't work. What's really strange though is that it only is for petg, I printed out a pla part and it was perfect. I don't even know if anyone will read this, I've never done one before, so any help would be appreciated.
Best Answer by Eef:
Nice: You are building your own guitar in Prusa colors!.
If under extrusion + clicking, I would check:
- if the nozzle is clean, because if the hole is too narrow, it builds up pressure inside, causing the extruder to push harder, and the clicking is the result of that.
- the the tension on the idler gear. If too loose, it scratches the filament, causing a shallow hole, and not able to push anymore.
(unload; cut a short piece off; load, then it be able to easily get the filament flowing.) If not go back to the clogged nozzle issue.
- If these two are OK. also check the temperature of the enclosure (if in enclosure); open the door so it cools down below 30 degrees Celsisus.
Or maybe something else is wrong. In the slicer I would cut a piece of your stl for test-printing, so you don't have to wait for 3/4 untill you know if your are OK or not.
RE: Printing with petg makes a clicking sound and under extrusion
Nice: You are building your own guitar in Prusa colors!.
If under extrusion + clicking, I would check:
- if the nozzle is clean, because if the hole is too narrow, it builds up pressure inside, causing the extruder to push harder, and the clicking is the result of that.
- the the tension on the idler gear. If too loose, it scratches the filament, causing a shallow hole, and not able to push anymore.
(unload; cut a short piece off; load, then it be able to easily get the filament flowing.) If not go back to the clogged nozzle issue.
- If these two are OK. also check the temperature of the enclosure (if in enclosure); open the door so it cools down below 30 degrees Celsisus.
Or maybe something else is wrong. In the slicer I would cut a piece of your stl for test-printing, so you don't have to wait for 3/4 untill you know if your are OK or not.
We will do what we have always done. We will find hope in the impossible.
RE: Printing with petg makes a clicking sound and under extrusion
If it were a clogged nozzle would it still be able to print other materials?
I've tried different tensions on the idler and that hasn't helped.
It has no enclosure and I've already tried a test print with the same filament and a different color petg, both suffered from underextrusion. But when I printed a pla part it came out fine with no clicking.
RE: Printing with petg makes a clicking sound and under extrusion
If it were a clogged nozzle would it still be able to print other materials?
I've already tried a test print with the same filament and a different color petg, both suffered from underextrusion. But when I printed a pla part it came out fine with no clicking.
- PLA en PETG are different (in temperature of nozzle, bed and cooling. If not familiar it is best to do a couple of testobjects and get the feeling for the material).
- Specially on the first layer. When PLA is printed is naturally sticks better to the bed then the nozzle. So the nozzle can be set low, and kind of pushing the material onto the plate. PETG sticks better to the nozzle then to the bed. The nozzle has to be set higher (could be as much as 0.2mm) so it kind of falls down on the bed. It cools there and then sticks to the bed and as the nozzle is moving is pulls the flow out off the nozzle. So the Z-adjustment is very important here.
- Read about cooling. It is tricky, reacts to a draft in the room, falling temperature in the night. etcetera.
We will do what we have always done. We will find hope in the impossible.
RE: Printing with petg makes a clicking sound and under extrusion
So should I change the nozzle?
I've done test prints with pla after it was clicking with petg.
I've been able to print successfully with petg before (guitar dummy 13 etc) and pla stull works now. Which makes me think it's not a clogged nozzle. But I'm new to printing so idk.
Or should I try to increase the heat that it prints at?
RE: Printing with petg makes a clicking sound and under extrusion
I have had similar issues and it sounds like either the filament is screwed up or the nozzel temp is too low and not heating up the filament. I would unload the filament an cut off 6" or so of filament and then print a test piece with the hot end at the upper limit of the filament range and see if the clicking goes away. You can clean out the nozzel by loading some abs or something at a higher temp. That will purge all the gunk out of the hot end. If you are still having issues I would pull the extruder and have a look.
RE: Printing with petg makes a clicking sound and under extrusion
Indeed. It could be that the PETG settings are at a borderline low hotend temp setting, where it still works but at high risk of clogging. That clogging can be partial or transient and clean out by itself when you switch filament.
Partial clogging can have a lasting negativ impact on flow though so I would recommend doing a cold pull anyway to make sure nothing is obstructing anymore and then test PETG with slightly higher hotend temp and maybe optimize retraction settings (as the clogging usually happens during retraction).
Mk3s MMU2s, Voron 0.1, Voron 2.4
RE: Printing with petg makes a clicking sound and under extrusion
It was a clogged nozzle thank you!!!!!!!!!!!!!!!!!01001000 01100001 01101101 01101101 01100101 01100100 01100010 01110101 01110010 01100111 01101110 01100101 01110010