Probebasic tool length calculation

No, I did not modify it.

I think I saw something in the Offset tabs but I am unable to fully understand and get rid of it. I did some tests but I was not able to remove the offset.
I mean, the mill works so far as every tool has the same huge offset but I still would like to understand why and where it comes from. I did a video that could help, but, to be honest, I do not know what to do....

I attached my var file (renamed as ini as the forum apparently doesn't allow uploading var files) as well as the machine config.
I also created a video of clicking around in the menu.  cloud.bihnairy.de/s/eDjYwNrbX8apHQF
 

where is your z home position set?

ah are you using the tool setter page to set the spindle zero with the probe spindle zero button?

ok i think i found a bug dealing with pocket in the tool table causing some odd behavior. let me dig into it some and see what is happening.

My Home Position is at the top of the Unit.

yes, I am using the Tool setter Page for the spindle Zero. However the Manual measurement was only off by 0,39mm (202 vs. 202,39mm).

I was using the Automatic Tool changing but had some issues (putting tools back sometimes stopped before the pocket and I had to restart linuxcnc, them the Tool was duplicated in the rack). For now I am switching by Hand.

Sorry for the delay I'm in the process of swapping dev PC's around so I can test on a clean install. In the interim. Check and see if your tool table has pockets listed in the file. If so, make sure the pocket and roll numbers are the same. Something in latest release of linuxcnc changed with pockets that I think is making a bit of a mess in some areas.