very dangerous behavior on 3.5.3

tom33

Hi there is a very dangerous behaviour with userposition and machine position.

I have WCS Z offset (G10 L2 P1 Z40) to avoid collision because I can change the height of my build plate.

When I ask the machine to go the position in a macros for ex
T0
G90
G0 Z50

The machine goes well to the userPosition Z50

But if have the same command on the start.g or mesh.g

the machine go to the userposition Z10

In a macro or in the terminal, when you ask for a G90, the machine moves in userPosition, but in start.g and mesh.g the machine moves in machinePosition.
it's only for the Z axis.

T3P3Tony

@tom33 thanks for pointing this out.

If you use G53 (https://docs.duet3d.com/en/User_manual/Reference/Gcodes#g53-use-machine-coordinates) how does that impact the behaviour?