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A while ago, I created some simple command buttons in Octoprint to help with bed levelling, by hopping to particular points on the bed. I realised that what I actually want to do is move Z up 10mm, move, and then home Z though, to avoid ploughing the nozzle along the bed if the level is badly off.

So I did this:

 - commands: - G91 - G1 Z-10 - G90 - G1 X30 Y160 F9000 - G28 Z name: Back Left type: command 

Which should be, switch to relative move, Move -10mm Z, switch back to absolute, go to the specified point and then home Z.

Except there's no Z move. I get the feeling that something might be optimising the moves together into one, or something similar... how can I get my printer to move up, then across, then down?

(printer is an quite modified Anet A8 i3 clone - I think the board is Melzi-based?)

1 Answer 1

Thanks in part to Tom van Der Zanden, I got a working version, which I'll paste below to add some actual value to this question! The G1 XY coordinates for each position are for near the corners on a 220x220 bed, but leaving enough room to access a screw in the corner of the bed if you need to (I don't anymore, but my printer did initially) - for different bed sizes, you'll want to change them. Add to ~/.octoprint/config.yml

controls: - children: - commands: - M140 S50 - M104 S190 T0 name: Preheat type: command - commands: - G91 - G1 Z10 - G90 - G1 X30 Y50 F9000 - G28 Z0 name: Front Left type: command - commands: - G91 - G1 Z10 - G90 - G1 X180 Y70 F9000 - G28 Z0 name: Front Right type: command - commands: - G91 - G1 Z10 - G90 - G1 X30 Y160 F9000 - G28 Z0 name: Back Left type: command - commands: - G91 - G1 Z10 - G90 - G1 X180 Y160 F9000 - G28 Z0 name: Back Right type: command - commands: - G91 - G1 Z10 - G90 - G1 X100 Y100 F9000 - G28 Z0 name: Centre type: command layout: horizontal name: Levelling 

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