@deckingman said in Z-Offset with only a Switch...I must be daft:

https://duet3d.dozuki.com/Wiki/GCode#Section_M558_Set_Z_probe_type

The P0 you have in M558 indicates that no Z probe is present.

So it should be P4 for a switch? I'll give that a try.

@mart said in Z-Offset with only a Switch...I must be daft:

a babystep of 0.3mm upwards and the print was going fine, i tried starting the same print again and left the 0.3mm baby step in, interestingly I had to increase to 0.6mm for the print to start, a 3rd print and I had to increase to 0.9mm for the print to start, in reality it was just the original 0.3mm I was babystepping and assume it just a display thing, I restarted my printer from cold and happily only had to babystep the 0.3mm again for my print to start

I have this same phenomena. Also baby stepping before the print starts (preheating), does not have an effect, I'm guessing because homing resets the baby step value, but the displayed value remains.

I only use a microswitch for my Z min endstop because my bed is perfectly level...but I am having trouble adjusting it in the config, it doesn't seem to do anything so I'm left with adjusting Z baby stepping every print

M574 X1 Y2 S0 ; set endstop configuration
M574 Z1 S1 ; set z endstop configuration
M558 P0 X0 Y0 Z0 H5 F120 T12000 ; Set Z probe type to switch, the axes for which it is used and the dive height + speeds
G31 P600 X-27 Y-5 Z3.6 ; Set Z probe trigger value, offset and trigger height

I don't have any conflicting items in override.