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JammerX19
(@jammerx19)
Eminent Member
Custom end position?

Can you define a custom end position for the Mk3? By that I mean ... when the print job is done, I'd like the extruder to park somewhere other than the back left corner. Specifically, I'd like it to be at least 25mm above the bed so I can get the steel sheet off the carriage a little easier (always worried about smacking the bottom of the extruder when I lift it).

Posted : 10/03/2018 1:58 pm
neil.e
(@neil-e)
Estimable Member
Re: Custom end position?

Yep. That's controlled by the gcode inserted at the end of your job in your slicer. If you're using Slic3r that came with the printer go to Printer Settings > Custom G-code > End G-code. By default there's this line:

G1 X0 Y200; home X axis

This returns the extruder to the left, and pushes the build plate forward. I've modified mine to be:

G1 X0 Y200 Z200 ; part removal

to get the head lifted up higher to make it easier to get the build plate out.

Posted : 10/03/2018 5:06 pm
Shoey
(@shoey)
Estimable Member
Re: Custom end position?

You would have to add something like this to your End G-Code. No need to modify firmware, you could do this in Slic3r. I would test it, don't know what would happen if you didn't have 25 steps to move up (printed really tall object). I'm assuming it just wouldn't move as it would reach max position.

G1 Z+25 F200; Lift Extruder 25

G1 - Issue a command for Linear Movement
Z+25 - Z Axis value of +25 (Move it up). If you had X25 or Y25 would move those axis, you can also combine G1 Z# X# Y#
F200 - Speed to perform Z+25
; Lift Extruder 25 - Just a comment so you know what the command does

BTW, If you don't know, you can PUSH and hold the knob to control the screen to Quickly access Z-Movement.

Posted : 10/03/2018 5:09 pm
JammerX19
(@jammerx19)
Eminent Member
Topic starter answered:
Re: Custom end position?

Thanks, folks, appreciate the tips.

Posted : 11/03/2018 2:19 am
moojuiceuk
(@moojuiceuk)
Trusted Member
Re: Custom end position?

I have added the command in Slic3r end g-code to raise the head up to the top once finished. I also get the printer to play a tune so I can hear that the print job is done (the MK3 is pretty damm quiet so I sometimes miss when it has finished).

M300 S440 P100 ;play fanfare
G4 P50
M300 S554 P100
G4 P50
M300 S659 P100
G4 P50
M300 S880 P250
G4 P50
M300 S659 P75
G4 P75
M300 S880 P450

Posted : 11/03/2018 3:04 am
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