Duet Web UI: M561 & G29 S2

deonholt

Hi again.

What is the difference between these two commands on the Duet Web UI?
M561 : Disable Bed Compensation
G29 S2 : Disable Mesh Grid Compensation

Which one do I use to do a "by knob" bed levelling and make sure that when I home all axes that all auto bed levelling is disabled?

Thanks.

fcwilt

@deonholt

The documentation for M561:

This cancels any bed-plane fitting as the result of probing (or anything else) and returns the machine to moving in the user's coordinate system.

The documentation for G29 S2:

S2 Clear height map

I play it safe and use both.

Frederick

deonholt

@fcwilt
Thanks very much for your reply. This clarifies it for me. I also do both ... just to make 100% sure.

Phaedrux

M561 should clear everything, but G29 S2 would only clear the heightmap portion, I've asked for some clarity on what else M561 clears out in addition. I could think of delta calibration as something that M561 would address where G29 S2 does not.

Nope, I was wrong. For all intents and purposes M561 and G29 S2 are identical.

fcwilt

Well if they are both the same then it might make sense to use the same description for both.

Frederick