gcode / brush to clean extruder head

I find that ABS buildup on my extruder sometimes catches on the piece I'm printing- does anyone else experience this? I find myself using some brush or other tool to clean the extruder once it nears 200 degrees prior to printing.

I plan on affixing a stiff natural bristle brush outside of the hot-print area, then writing a little gcode to move the extruder there and brush it back/forth a bit before and after each job.

What do you think, good idea?

 

Please share the code.

Is this necessary all the time?


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I don't find it necessary all the time, however it sure helps having a clean brush when starting a new painting IMHO. I'll have some code to post in a day or so once I finish testing it.

 

i've found doing a skirt will 'clean' the nozzle. though you run the risk of catching the junk once it passes around.

 

here ya go . (150,20) is the coordinates of my brush, currently using a fluffy scotch brite pad. Be sure to adjust your Z also.

; swipe (x) left, right, and back a few times
G1 X150.000 Y20.000 Z5.000 F7800.000
G91 ;set positioning to relative
G1 X10.000
G1 X-10.000
G1 X10.000
G1 X-10.000

; swipe (y) front, back, and front a few times
G1 X5.000 Y5.000
G1 Y-10.000
G1 Y10.000
G1 Y-10.000
G1 X-5.000 Y+5.000

G28 ; home all axes
G90 ; set positioning to absolute