I’m trying to use ColorFabb XT on the Lulzbot Mini Printer. Mostly, it’s fabulous! It’s a lot less brittle than the HIPS material, and it doesn’t delaminate or crack anywhere near as easily. It’s allowed me to print really big prints (6.5" x 4") that when I printed in HIPS just fell apart in my hand.
To do this, I start with the Taulman n-vent profile, and then increase the printing temperature from 230 -> 255 C (ColorFabb’s recommendation), and bed temperature to 60 ->70 C.
However, I’ve noticed that the plastic continues to extrude even after it’s been switch off. If I extrude 10mm of plastic, 10mm comes out, and the extrusion stops, but more plastic continues coming out. This leads to long threads of plastic everywhere like this:
and when the printed results are seen they look like this with lots of jagged things coming out (presumably at the point when we move to a new layer?) like this:
I can see I’m close, but I’m trying to work out what I should change to fix this. Should I increase the retraction (experimenting with that)? Should I reduce the flow rate percentage?
Love to hear your thoughts. Thanks in advance!
Hobby_Knife_think.gcode (278 KB)