So I am still having the filament stall and the extruder gear chew a notch in it. There is no clog in the hot end.
This is often the second print not the first (heat related?)
I have been using different filaments but some (prusament and 3dpc) of known quality and dimension stability. I have checked as well.
Thoughts? (extruder arm and bearings?)
Print quality is fine, dimensions are great, 20x20x60 measures 20.01x19.96x59.99
I have changed:
Large extruder gear
Throat (all metal titanium) new PTFE tubes
Filament guide (plastic thing that sits between the ptfe and extruder gears)
PTFE guide in arm
added BLtouch and firmware (waggster mod, most recent)
Improved the bed cupping by tensioning it against a milled block during heating.
Removed two dupont connectors (and the hot glue holding them) and replaced with the JST vh that clip into the board properly.