Setting up Bed level with 3 motors

BlueDust

So it looks like, whatever the Extruder (E0) is set to in power 1400ma, the Z motors are also set to.

I updated E0 to 1200, and the Z motor also changed... I do not know where the E and Z are crossed...

Phaedrux

Can you post your entire config? I think the axis definition isn't quite right and the order of commands matters.

fcwilt

Hi,

Try filling out your M584 to specify what motor connections 2,3,4,5 & 6 do.

Sometimes funny things happen when defaults are relied upon.

Frederick

Phaedrux

@BlueDust said in Setting up Bed level with 3 motors:

M584 X0 Y1 Z9:7:8

Ah yes of course, you're missing the E definitions.

BlueDust

Thank you!
You guys are awesome!

I just copied the config out of the Wiki and it does not have E in the example on setting up 2 or 3 motor bed leveling.

https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors

I have more tweaking to do, but it does actually work now.

Thanks again!

Phaedrux

Thanks for pointing that out. I'll make a note in the wiki to make sure to include your extruder definition as well.

Phaedrux

@BlueDust said in Setting up Bed level with 3 motors:

https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors

Updated to include the gcode wiki note for M584:

https://duet3d.dozuki.com/Wiki/Gcode#Section_M584_Set_drive_mapping
VERY IMPORTANT! Assigning a drive using M584 does not remove its old assignment. Therefore, if you assign a drive that defaults to being an extruder drive, you should also assign the extruder drives explicitly as in the above example. Failure to do so may result in unexpected behaviour.

BlueDust

2 more comments.
My Extruder drive never changed from Drive 3. It just was not called out when I had to explicitly call out the 3 Z motors (per what the wiki was, but now you updated with E). All I did was move the Z from drive 2, to 7, 8, and 9.

Can the heat map be updated to show the original and/or the new level after G32 is run?
Just to see the difference. Also, if the bed needs to level more than it is allowed to correct itself in the GCODE, this may be good to see. I think I saw 1mm max correction unless it is called out.

Thanks again!

Veti

@BlueDust said in Setting up Bed level with 3 motors:

My Extruder drive never changed from Drive 3. It just was not called out when I had to explicitly call out the 3 Z motors (per what the wiki was, but now you updated with E). All I did was move the Z from drive 2, to 7, 8, and 9.

but 7,8,9 remained extruders and additionally became z motors at the same time.

BlueDust

I didn't realize everything was considered an Extruder if not declared. (Except for X, Y, Z labeled drivers). That explains my biggest question when setting up my Duet2 last year as I wasn't aware of M584 until now. Now that I need it to setup this bed leveling feature.

Thanks!