Start GCODE Script for Wipe

General Software
#1

This video shows a 3D printer (Type A Machine Series 1) do a wipe at the start of the print job.

https://www.youtube.com/watch?v=zPMjLNjubXQ&feature=youtu.be&t=112

Is there any way to do this with the Taz 5? I know my beginning scripts do an auto-home, and that always seems to leave a bit of extruded filament on the nozzle, dirtying/gumming it over time. I’d love to be able to start a job without having to synchronize a tweezer movement to clean the head before it starts the skirts.

Also, more of a hardware question… what’s the best way to clean the nozzle’s exterior? Wipe or scrape gently down when hot? Acetone when cool? Thanks!

#2

Removed for Clarification

#3

Removed for Clarification

#4

Here you go.

This works on my Taz 5 with inductive probe. Only use this code if you have the inductive probe added.

G91 ; switch to relative positioning
G1 Z10 ; safe raise of z axis to ensure probe doesn't hit bed clamp
G90 ; switch back to absolute positioning
G28 ; home all axes
G29 ; level print bed
G1 X298 Y137 Z2 F5000 ; move to wait position right hand side of the table
G1 Z0.4 ; position nozzle
G1 E25 F300 ; purge nozzle
M400 ; wait for purge to complete
G1 X285 F1200 ; slow wipe
G1 Z0.5 F1200 ; lift

If you don’t have auto leveling you can add this code to the end of your current start gcode and it should work.

G1 X298 Y137 Z2 F5000 ; move to wait position right hand side of the table
G1 Z0.4 ; position nozzle
G1 E25 F300 ; purge nozzle
M400 ; wait for purge to complete
G1 X285 F1200 ; slow wipe
G1 Z0.5 F1200 ; lift

http://youtu.be/-p8Mt9KcFKg

#5

GCODE from a different printer will give you an idea, but cannot directly be used on another machine. Two people that installed a wiper pad on the back vs the side of their Taz 5 will require a significantly different wipe procedure. Additionally, optimal wipe temperatures vary by material.

Another point of reference would be the LulzBot Mini’s wipe procedure, profiles are located here http://download.lulzbot.com/Mini/1.01/software/print_profiles/cura/Mini_single_extruder_v2/

#6

You could also have a look on my start code, it’s no wipe but it has a very simmilar result. Working great for me:
https://forum.lulzbot.com/t/small-improvement-to-start-end-gcode/2423/1

#7

While true, I don’t believe he was looking for a mini style wipe gcode. If you see in the video it’s more of a purge and drop. The method I posted mimics the effect in the video he posted. There is no Makerbot style wipe up front or Lulzbot style in back ( I think there is a mullet joke there somewhere…).

#8

Thank you, everyone!

#9

Just following up, I’m using the code I posted above to do a purge and wipe and it is working out great.