Posts: 6
Joined: Sun Jan 18, 2015 3:02 pm

GCODE to prime extrude

Sat Jan 24, 2015 8:21 am


After running several hours worth of prints on my right extruder I switched to the left. The first few inches of the brim came out kinda brownish (white filament) and burnt looking. It did not adhere well. I was wondering if I can add some form of CGODE script to move the head to the ooze bucket and squirt out a few inches prior to the print start?

Posts: 1435
Joined: Sun Feb 16, 2014 10:52 am

Re: GCODE to prime extrude

Sat Jan 24, 2015 12:32 pm

Might want to read the recent tip on editing your scripts: http://www.forum.simplify3d.com/viewtop ... f=8&t=1959. It mentions a very useful reference for gcode syntax.

All you need to do is add a few lines to your starting script. Something like:

T1 ; switch to left extruder
G1 X100 Y100 F3000 ; move to prime position (replace X100 Y100 with the coordinates of your dump location)
G1 E10 F800 ; prime extruder

Posts: 80
Joined: Wed Aug 27, 2014 6:48 pm

Re: GCODE to prime extrude

Sat Jan 24, 2015 3:52 pm

Also, if you're getting burnt/brownish looking gunk, this usually occurs when the nozzle has plastic from previous prints stuck to it. It's good to clean your nozzle every once in a while before you start a print so you don't get any gunk on your prints

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