I have been running my TAZ6 for a couple of months and just put on the Dual Extruder Head v2 today. I’m printing out the calibration squares, and having a couple of strange issues.
(1) It was retracting far too much. At one point, one of the extruders retracted so much that it expelled the filament out the top and I had to reload it. I managed to fix this issue by going into Cura and changing Retraction > Dual extrusion switch amount from 30mm to 10mm. I don’t know why this was set so high initially?!? I certainly didn’t change it. I mention this just in case it is related to my current problem:
(2) Right after auto-leveling and just before beginning the print, it spits out a bunch of junk filament. First, the primary (T0) tool head extrudes a bunch of filament. Then the secondary (T1) tool head extrudes a bunch of filament. By a bunch, I mean like on the order of 60-80mm - almost enough to form a life-size hershey’s kiss ABS booger. If I pause the print and remove this, it completes the print OK.
Any advice on booger prevention?