Irregular extrusion in Prusa i3

[Manuelspk]

Hi!

My printer was working fine, but suddenly it started to make an irregular extrusion overnight.
I have printed this model several times, so I guess It's not a problem of the GCode.

It seems like sometimes it prints thin lines. I have tried to clean the extruder, calibrate, change filament, but nothing worked for me.

Could you please help me with this?

[jjpython]

It looks like underextrusion, maybe a temp issue??

[3Dex]

Without more photos it is difficult to tell the issue. However, under-extrusion does look to be the problem. I would guess a partial clog is causing this. You can easily clean your nozzle by heating it up and "flossing" it with wire (drawing the wire through the nozzle)

However, I would also check your belts. Perhaps one has come loose and is causing wobble and many other adverse effects.

I hope this helps.

Regards,
3DEX

[wellsmic]

I agree it appears to be under extrusion, probably caused by a partial clog. However, there is another possibility. Once, on a print after using wood filament (very abrasive), I had something similar happen. In that instance I checked the extruded filament dimensionally and it was over sized. Once I changed my nozzle the problem was gone, I am now looking at hardened or stainless nozzles but have not found one I like yet.

[Jimmy Shaw's Tidbits]

Looks like a clogged nozzle to me.

[Manuelspk]

Hi! Thanks for your replies.
I'll try to clen it deeply, but everytime I print something, It gets even worse.

Thanks! I'll keep you informed.