I have been trying to practice printing this, http://www.thingiverse.com/thing:533814/#files, so I can get better at printing with this dual head. I have the printer pretty well aligned, my issue is with the extrusion of the NinjaFlex.
I am running PLA into T0 and NinjaFlex int T1. I have worked the extrusion rate, retraction rate and start up rate out with PLA, but I seem to be all over the place with the NinjaFlex. I have had an extrusion multiplier from 1 to 2, retraction rate of up to 3mm, start up (after retraction) of up to 1 mm… What happens every time, I not only ooze and print the squares with the oozing NinjaFlex while the PLA is printing, but when it starts back up, nothing comes out until a good 10 to 15 seconds… By that time it is almost time to change heads, and when it does come out, it starts slowly. Then it gets better when infilling. I have loosened the bolt on the extruder, varied the multiplier, retraction, extra restart distance…Please hep me figure this out… What could I be missing?