Hi Nick,
kool, its starting to come together. When you 'go to center' you need to be looking at the DROs displaying Machine Co-ordinates.
In the video the DROs were in work co-ords and no doubt due to non zero numbers in the G54 work offset they display numbers other than 10,-3,0.
Likewise your soft limits are in terms of machine co-ordinates, to have the DROs display work co-ords doesn't tell you anything.
Also if I understand your commentary the soft limits are 'inside' your home switches?
If you hit Ref All part way through a session and the soft limits
are engaged, the normal situation, then the machine will fail to re-reference. Sorry but that means you've just broken perhaps the single most
important motion function in Mach! It is normal to have soft limits at or just 'outside' of the home switch. My soft limits are about 2mm outside of the
X,Y 0,0 home switch positions and the upper Z soft limit is 0, ie coincident with the Z home switch.
Experiment with the function but with the DROs set to display machine co-ordinates, you'll learn a great deal more about your machine and it limits if you
do so.
Craig