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Cleaning printer nozzle with a wire brush

Cleaning printer nozzle with a wire brush
November 10, 2019 02:29PM
I tried an experiment with a wire brush I had from an old Stratasys printer. I printed a bracket to hold the brush and then ran a print, sending the extruder nozzle through the brush after each print layer.

Results weren't good.

I tried playing with the path through the brush, the height of the brush, etc., all to no avail.

Live and learn.


Son of MegaMax 3D printer: [www.instructables.com]
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
Re: Cleaning printer nozzle with a wire brush
November 10, 2019 07:31PM
Maybe a wire wheel brush with a ratchet? So it would rotate a bit when the nozzle goes forward, pushing the wheel over a cleaning scraper. Coming back through the brush, the brush would stay still, hopefully cleaning the nozzle. Dunno.
Re: Cleaning printer nozzle with a wire brush
November 11, 2019 05:53AM
I do not have any first-hand experience with cleaning a nozzle that way during a print but what could help is if you extrude ~20mm of filament just before you move over the brush, that way the blob that gets cleaned off is attached to the extruded filament and is likely to fall off into a bucket or something keeping the brush "clean" for the next wipe. I am thinking of the way BCN3D implemented this on their SIGMA printers (they use a silicone(not sure of the material) wiper instead of a brush).

Something i wanted to experiment with for a while but never got around to testing it so far..
Re: Cleaning printer nozzle with a wire brush
November 11, 2019 06:33AM
I thought about trying something like that. The brush is still on the printer. I'll try it and see if it works. Thanks.


Son of MegaMax 3D printer: [www.instructables.com]
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
Re: Cleaning printer nozzle with a wire brush
November 12, 2019 03:15PM
Maybe your brush hairs are too short, I use a brush with long sturdy hairs and do not face your issue.
Re: Cleaning printer nozzle with a wire brush
November 14, 2019 03:47PM
Me I have good results with "teeth brush":

IMG-20191114-213131

start gcode:

G28 ; Home all
G0 F9000 X325 Y110 ;Move over bucket
G92 E0 ; ZERO EXTRUDER LENGTH
G1 F250 E20 ; Extrude 20mm
G92 E0 ; ZERO EXTRUDER LENGTH
G4 S3 ; Wait 3 seconds
G0 F9000 Y170
G0 F9000 Y130
G0 F9000 Y170
G0 F9000 Y130
G1 F250 E-2 ; Retract 2mm


D-BOT custom
HYPERCUBE protocreation
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Re: Cleaning printer nozzle with a wire brush
December 07, 2019 09:12AM
I'm trying to clean the nozzle, not melt the brush!


Son of MegaMax 3D printer: [www.instructables.com]
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
Re: Cleaning printer nozzle with a wire brush
December 11, 2019 04:29AM
It's not melt, just black TPU stick on nylon brush winking smiley
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