@Steppenleguan said in Independent dual z axis with endstops - z homing not working:

@knuxvomica no they don´t.
Current state: G28 homing failed , and nothing happens
Before with a homez.g: The axis lifts 5mm, moves down then passes! the endstops and hits my frame when I don´t emergency stop...

As you can see I am using the M564 command to test the axis movements in advance (which works fine) but obviously I don´t have any homing , i.e. no printing possible

M564 H0 ;move without homing

@Phaedrux said in Independent dual z axis with endstops - z homing not working:

Please post your full config.g
Homing Z should be as simple as a G1 H1 Z move to move the z axis such that the endstops are hit.

You need G1 H1 Z-700 at the end of your homeall.g to home the Z axis. The same would be needed in homez.g

@craigylad86 said in Loss use of z axis.:

The z axis started to play up by missing some steps and eventually juddering up down and in opposite directions as I was controling.

That's typically caused either by excessive friction of the axis; or binding (most common when there are multiple Z motors and they have got out of sync), or setting the Z acceleration (M201) or maximum speed (M203) too high.

It could also be caused by a bad connection between the stepper motor and the Duet, so that only one phase of the motor is being driven. If that's the case then you may get "phase may be disconnected" warnings from RRF.

@engikeneer

Thanks for responding. I have downloaded new firmware linked by dc42 (see my response to him). Broke my zstop switch. May get back to you if I remain stuck.