I have had my TAZ 5 for two weeks now and so far all prints have turned out great. I used PLA and colorfabb XT, both worked well.
But suddenly I start having some weird issues with retraction:
- the first few layers print well with retraction disabled
- as soon as the first retraction actions take place the hobbed bolt retracts more than it extrudes; usually within a minute of having retraction enabled I see the filament be retracted so far that the grind marks become visible above the extruder head and - even though the hobbed bolt still moves in both directions - it never pulls the filament deep enough into the nozzle to continue printing
I am using colorfabb XT (which worked great before) at 245° and 40mm/sec. I tried different retraction distances and speed, all show the same issue. I also tried different slicers (Cura and Simplify3D), but the problem is the same. The grind marks on the filament look normal and the firmware is still on factory settings.
I have no further ideas how to fix this issue. Please help…