Lulzbot Taz 6 enhanced nozzle cleaner scrubber with gcode

thingiverse

This is my Lulzbot Taz 6 Aerostruder nozzle scrubber device designed to achieve a better auto level each print. I control my printer remotely, and having a clean nozzle really helps make the auto bed levelling more reliable. When printing in high-temperature filament, you'll need to drill two holes in the print bed chassis - see pictures for positioning details and watch out for wires on the underside of the print bed when drilling. Some people say don't use a brass wire brush due to potential electrical short circuits but I have found it's the only way to get a reliable automatic clean. For insulation, I use a silicone boot on my print head and the design means the brush doesn't touch the electrical surfaces of the bed. It works for me, but you use this design at your own risk! I recommend printing this in as high-temperature filament as possible. It touches the edge of the print bed so will get soft if you use a high bed temp. You've been warned. The wire brass wire brush is a 15mm round section wire brush from Amazon. I cut it to length with bolt cutters and then soldered the ends with a normal soldering iron to stop the wire core unwinding, letting the bristles get loose. Please see my Amazon affiliate link for the brush that worked for this project. I provide my designs for free, so any income from this link helps pay for the design process. Thanks! https://www.amazon.co.uk/gp/product/B00REGWV5A/ref=as_li_tl?ie=UTF8&tag=rjelbertwebsh-21&camp=1634&creative=6738&linkCode=as2&creativeASIN=B00REGWV5A&linkId=820da94785da8942ccd3a89e157ec55c I tried lots of different types of brush and scouring pads before settling on this v2 design. The square brass brushes are too high and get in the way of the print head on low X values. Scouring pads are fine when used manually, but I couldn't get a pad to work reliably when held in a device and bolted to the bed chassis. I have included the G-code you'll need to insert into the start G-code under machine/printer settings in Cura. If you're using another package, add this G-code before the auto bed levelling starts. The first three lines are from the original start G-code to help put the rest of the code in the right place: G28 Z ; home Z G1 E-15 F100 ; retract filament M109 R{material_wipe_temperature} ; wait for extruder to reach wiping temp ; jelbert taz6 wire brush scrubber code... ; start with the left side to help stop bits being flicked onto the print bed ; Taz6 y-160 to y-210, x-16 is centre, x-20 is left but use -19, x-12 is right side M117 Scrubbing... M106 S200 ; turn on part cooling fan to harden the bits that are scrubbed off ; its -19 because -20 triggers the X end stop switch and puts the bed out of alignment!! G1 X-19 Y210 Z10 F3000 ; move to scrub pad start position M400 ; wait to finish G1 X-19 Y210 Z10 F3000 ; move to scrub pad start position M400 ; wait to finish ; scrub on the left G1 X-12 Y160 F2000 ; fast wipe G1 X-12 Y210 F2000 ; fast wipe G1 X-12 Y160 F2000 ; fast wipe G1 X-12 Y210 F2000 ; fast wipe G1 X-12 Y160 F2000 ; fast wipe G1 X-12 Y210 F2000 ; fast wipe ; scrub on the centre G1 X-16 Y160 F2000 ; fast wipe G1 X-16 Y210 F2000 ; fast wipe G1 X-16 Y160 F2000 ; fast wipe G1 X-16 Y210 F2000 ; fast wipe G1 X-16 Y160 F2000 ; fast wipe G1 X-16 Y210 F2000 ; fast wipe ; scrub on the right G1 X-19 Y160 F2000 ; fast wipe G1 X-19 Y210 F2000 ; fast wipe G1 X-19 Y160 F2000 ; fast wipe G1 X-19 Y210 F2000 ; fast wipe G1 X-19 Y160 F2000 ; fast wipe G1 X-19 Y210 F2000 ; fast wipe ; move nozzle up off scrubber pad G1 Z10 F3000 M400 ; wait for moves to stop M107 ; turn part cooling fan off M117 Wiping... ; end of scrub sequence