Thank you so much for the kind reply, but as much as i tried i cannot find the way---
You should make a short video, because mode 1 and mode 2 have two different beheaviour, and even if i setup the fixed probe on the machine bed, still not working.

So for sure i do something wrong!!!!!
If you don't mind to write the steps one by one as in a manual with the setup of the mode and next step to follow that would help a lot.
is not clear in which mode you measure the bed zero, (1 or 2?) as my bed zero is at -140mm from the machine zero(which is positive up)
and every time you hit the zero button, it go up to zero the z axis and start again, but the odd number in the controller is always a strange number, it doesen't make any sense honestly..
In mode 2 when the controller is setup as "current position" and the tool gauge entered manually(caliper measured) i can measure the worktop but thats that :-(( and is the only way i can work