Nesting commands in Macros

i3dp · 26 Mar 2018, 17:49

Hello everyone,

I'm trying to set up a semi-automatic probe offset Macro for my self built CoreXY printer.

Essentially, the process is to home, send a G30 command to probe the bed. After that I zero the height with G92 Z0 and send M208 S1 Z-100 so I can use the jog controls to go below 0.

I then use a piece of paper to find the correct nozzle height and then I put that Z height (changing its sign from - to +) in the G31 command in the config.

However, I do not know how I can automate this.

1st Macro will look like this:

"
G28 X
G28 Y
G1 X110 Y110 F6000
G30
G92 Z0
M208 S1 Z-100
"
I would then to the paper thing and I want another Macro to read the Z height value and save it in the config. Is there any way I can do this?

Macro 2:
"
G31 Z"M114 Z"
M500
"

Regards,
Adrian

dc42 · 26 Mar 2018, 19:36

I think this may work:

position the nozzle a few mm above the bed,
send M558 P0 to select manual probing mode
send G30
raise the nozzle a few mm
use M558 to select the Z probe
send G31 S-2
send M500 P31 to write config-override.g including the G31 parameters

i3dp · 27 Mar 2018, 13:33

Thanks for the reply!

I don't quite understand what G31 S-2 does. Looking at the wiki the S parameter is for temperature calibration?

I'm going to try it out anyway and see the results.

Regards,
Adrian