For this experiment, I chose to print with completely stock/easy settings with fast low quality print and stock PLA settings.
I'll check out those resources. I'm presuming somewhere in those resources it shows how to change the motor current? That was one of the first things I looked for with this problem. I'll check the mechanical stuff first.
Thanks for the response!
Yes - you are definitely skipping backwards. It looks like you are printing very fast - maybe 5 cubic mm/sec? I'm not sure - I don't have a good eye for this.
Anyway, of course the quick fix is to print hotter. Or slower. What is your:
- layer height?
- print speed?
- nozzle temperature?
There's lots of discussion and fixes. I'm not sure what it is that people did to fix this issue but it seems different for everyone. One person simply got a new nozzle and bowden tube and all problems went away. I recommend:
- you put the filament on the floor in some kind of holder so the filament approaches straighter
- print at 240C (or print slower)
- if printing over 4 cubic mm/sec then even hotter - 250C (but this is too hot if you are printing slow) e.g. 100mm/sec .1mm layer
- Check for tilted Extruder motor due to the nut holding the frame together sitcking into the back - look down from above the top of the UM2 at the E motor where it touches the back of the machine
- Check knurled wheel to make sure it is touching the PLA nicely
- Try increasing the current of your extruder motor from 1.25ma to 1.5ma - this made a huge difference for some.
Unfortunately there is so much info about this topic and it is spread among 800 posts:
In the second thread above, post #545 by me lists all the theories as to what might cause this:
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