Constant Jams
When I first started printing, I could do a benchy, bulldog, my own design, etc. Happy customer of a first-time printer. Then one day the sample prusament got jammed and stopped printing. After a whole host of other learning opportunities overcome, I still have this issue. I cannot trust the printer alone:
It will stop extruding, yet continue moving the XYZ along its merry way.
I was told to check the tightness of the idler screw (the one of the right side if facing front) by people and by the manual, but it never says what to adjust it *to* and it didn't seem to make a difference.
I unscrew the unable-to-unload filament by unscrewing the tube, moving the extruder motor forward, clipping the too-thick-for-the-tube part, heat it up to 224 and manually purging. I load filament again. I print for a while, then I'm back to jam's-ville.
I can't get a successful print off this more than every-other. 🙁
Best Answer by NVGG Creations:
@samuelsarette
Could be you have the under extrusion issue with the hotend being too low in the assembly. Check out the solution in the thread that g-j-sieben (above) has posted.
RE: Constant Jams
Two print examples that both jammed
RE: Constant Jams
Two print examples that both jammed
Video watching a print fail
RE: Constant Jams
Did you try to cold pull till it's clean?
RE: Constant Jams
@lichtjaeger
Every "cold pull" instruction I read says to use ABS (don't have) or Nylon (not supported? don't have)
Guess I'm gonna have to buy some ABS?
RE: Constant Jams
Ok, saw instructions that said I could do it with PETG - though i'm pulling white filament with white filament so... we'll see.
RE: Constant Jams
No need. PLA cold pulls work pretty well.
- Unload your filament
- Unscrew the PTFE tube from the cool block
- Move the Z-axis to middle height
- Set the hot-end temperature to about 220°C
- Push a piece of PLA filament through the hot-end
- Set the hot-end temperature between 85°C and 90°C
- Keep continues pressure on the filament so it can build up in the nozzle
- If the target temperature is reached, pull the filament out (not jerky)
Some people also suggest cooling the hot-end fully down before heating it up to again to between 85°C and 90°C.
RE: Constant Jams
https://forum.prusa3d.com/forum/general-discussion-announcements-and-releases/avoiding-early-prusa-mini-issues-common-issues/ might be helpful
RE: Constant Jams
@samuelsarette
Could be you have the under extrusion issue with the hotend being too low in the assembly. Check out the solution in the thread that g-j-sieben (above) has posted.
RE: Constant Jams
Yay! I did totally have the "hot end too low" issue.
The tube inside the extruder likely had a gap. Seems to be much better after following the steps from the link's reference video: