I was having a lot of trouble printing a new cover....
These all stopped printing with jammed filament about half way through the print.
In the process of the black PLA prints, I had to pull the hot end apart to remove the filament and found it was a bit loose. That was the problem, I hoped. But no!
So, maybe the black is the problem?
Well, you can see that changing to the grey did not fix it.
To do these prints, I have changed the slicer program used. The slicer is the program that converts the drawing .stl file into the .gcode the printer understands. This new version has a setting to keep the holes the correct size. Using the older version of the slicer, the holes turned out smaller that set so I'd fiddled the hole sizes to fix that. The setting in the slicer does the "fiddling" for me now. As a result of using the new slicer I may go and redo the old files.
Anyway, it turns out the problem with the print stopping looks to the the retraction setting in the new slicer. The retraction is the filament being pulled back into the printer a bit so there will not be melted filament oozing out while the head is moving and not printing.
Mr Google showed one cause of the filament jamming could be the retraction set too high. If it is, more heat gets transfered up into the cold part of the hot end eventually causing the filament to melt too early so causing a jam.
The retraction was set at 6.5mm and a change to 2.5mm fixed it
This version starts out with black for 3 layers, then I change to orange for a bit, then back to black.