3DPrinting

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[Troubleshooting] Clog Guy is back, and things have completely ceased making sense. (self.3dprinting)

submitted 6 months ago by papalonian to c/3dprinting

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Hi guys. Please check my previous post for any background questions, I don't have it in me to go over everything again.

Long story short, I was having issues with clogging that were being caused by my hotend not reaching the reported temp. After a few days of troubleshooting and diagnosing the motherboard and Klipper settings, I gave up and decided the motherboard was faulty (even though I could not perform any tests to determine in) and bought an SKR mini. I got that all set up, and the printer has been working flawlessly since then.

Until now.

Same exact problem; one print goes perfectly fine, next print, failing to extrude by the 4th layer. I removed the clog, restarted the print, now can't even extrude the priming line. Fearing the worst, I disassemble the hotend, try hand feeding filament, and once again I am unable to push more than a few centimeters through before it gets clogged up. A probe thermometer reads ~160C while Klipper reports 200C.

What could possibly be happening here? The board is an aftermarket replacement from a completely different company, so I doubt it's a recurring manufacturer defect, but I have no idea what else can be causing this.

At this point I've spent so much time and money trying to fix this printer that I could almost buy a new one, but at this point I'm not convinced even that would solve the problem.

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[–] [email protected] 4 points 6 months ago (1 children)

Maybe I missed a paragraph but did you try a new temperature sensor?

That would seem like a logical error source for me when the reported temperature does not match the actual result. Or maybe there is an issue with the thermistor calibration? Is the thermistor type set correctly in your klipper config file?

[–] papalonian 1 points 6 months ago

Yup, went over those a few times throughout the posts, multiple thermistors, multiple ports on the board, several configs in Klipper. All of them identical behavior.