Re above posts homing fail
Well I had one of those photographic memory moments , but with the lens cap on !
my homing went pearshaped ,
I hadn't done anything except put the new z axis on.
As soon as I presssed home it moved 10 mm , got a fail alarm .
So I went through all the GRBL settings , sat at that screen nearly all day trying to invert every setting I could to make it work
In desperation I went to my phone to look at the pictures I took prior to dismantling the Z , and sure enough , I had put 1 wire on the Z limit switch on the wrong terminal ,
if theres a moral to this story , its if you have an issue , always go back to the last thing you changed, in this case it was me wiring up the Z limit,