Negative home position seems to NOT work ???

Thanks.
I was at the local hw store just now and scored some 8mm precision threaded rods that should be better for feeds.
M8x1.25 should be better than M5x0.8 seeing how I have plenty position-accuracy vs stiffness in the design and could use the extra speed.
Also I got perfectly straight rods so no more whipping. Especially when I support em in both ends.

I also got some more MDF so I can make a longer Y table. The plan has always been to use a longer Y table if I need to, and it seems I need 300mm range on Y while my design only delivers 170 now.
Due to the flying X/Z I do have better range there than traditional gantry design though.
I can use entire width of table in X, It also allows tool length sensor to be located outside the main table area to be always available regardless of Y position. (Saving repositioning time when changing tools.)

I also have started work on a ultrasonic touchprobe that will allow contact probing without pressure and should as such yeld very accurate probing results even on soft materials.

Won't know untill I finish it, but it should be good as near-contact should be easily distinguishable from actual contact.
That's one of the things that will be most fun to find out...
It is a bit more high tech than a springloaded set of contacts though. Luckally that's my job

Yes. It is basically a ultrasonic resonator with a probe-tip on. When it touches something the resonance changes/dies-down.
In theory it should work but will be fun finding out just how hard it is.