Finally built my z probe. Now I can load the vcarving tool path into gcode ripper and wrap it around curved objects.
I have never seen curved support before. Can you give some more info? Is this a specific feature of a specific application for? How do you wire this up?
Very intriged by this… Tell us a lot more please!! 
@Dat_Chu
Sure. the probe is just a cheap switch from radio shack. I wired it up to an input terminal of my parallel break out board. Told LinuxCNC that that input should be recognized as a probe input. Then calculated the offset from the tool tip to the probe tip. then loaded the toolpath into g-code ripper. http://www.scorchworks.com/Gcoderipper/gcoderipper.html told it i wanted to add probing and plug in the probe offsets and how many probe points on the surface of the curved piece i wanted. Then just save out the new gcode and run it.
You have to be careful how you hold down the part since it is real easy the crash the tool or the probe as it’s probing the part into one og the hold downs. So clamping pressure from the side or double sided tape are your best bets…
Its the same kind of idea that they use for milling pc boards but that’s easier because you can use the pc board copper clad and the milling bit them selves as contacts.
Love it
How did you build your probe, plans or self designed? WHat is your control software?
I want one.
@Bruce_Lunde just made it up. Got a 1/2 inch dowel and bored out the center deep enough for the switch to fully seat and have room for the wires to hang out. Drilled a hole in the side for the wires to exit. Got a block of wood and drilled a 1/2 inch hole in it. And slotted the piece to the hole drilled another hole 1/4 inch and put a threaded rod and nut on it to make a clamp for the probe. And slapped it all on the z carriage.
Realy cool
@Michael_Bridak_K6GTE Thanks for the info. I think I can do something similar with my MACH3.
@Bruce_Lunde Looking forward to see your result too!
Would be awesome to be able to mill on curves.
Might give it a shot myself if i can find the time in between orders. 
Mach3 has a digitize wizard that can read the 2½D surface of any object, if you have a proper probe with a known ball probetip that can read touches in down and side movements.
With that you can get a curved plane to import into any decent 3D program.
From there you can add text or patterns to be carved on the curved surface and then generate NC code.
@Henrik_Larsen Thanks, I have not explored this area of Mach3 so I will look further into it.