Changing the Z steps and multiplier changes distance

zzing

On a maestro with the last beta,

I ran across a weird issue while troubleshooting another problem with a print.

In my setup, I normally have this:

M92 X80 Y80 Z400 E837        ; Set steps per mm
M350 X16 Y16 Z16 E16 I1

and the printer works fine.

When I changed it to this:

M92 X80 Y80 Z25 E837        ; Set steps per mm
M350 Z1 I0
M350 X16 Y16 E16 I1

For full steps, and trying 1/4th steps (Z100) and 1/8th steps (Z200) each change how much it moves (manifesting with really slow speeds).

I have a BLTouch that because it moves slower and less distance, when it is trying to home it can only clear the BLTouch fast enough on 1/8th steps.

An example on full steps of it moving down while probing and when the bltouch is triggered it continues to move down until it is errored out: https://www.youtube.com/watch?v=sWSr2CEH2sc

My full original config: https://gist.github.com/madebyjeffrey/6c8566b6406419aa2b0934ae8736869e

My deploy probe script: M280 P64 S10

dc42

See https://duet3d.dozuki.com/Wiki/Gcode#Section_M350_Set_microstepping_mode, in particular the bit about the steps/mm being adjusted automatically.