3D CNC Probe

This is a DIY 3D-Probe to use with your CNC-Machine,

the basic principle is fairly simple, the probe makes contact with something at any side, and the movement interrupts the internal connection, that's all.

Additionally to the printed parts you need:
6x 4mm steel / metal balls
3x 5x6mm cylinder (can be cut from a larger piece)
3x 6x15mm spring (can be a bit longer)
1x 6mm shaft
1x 4mm proberod
1x contact PCB (can be DIY or ordered)
3x M2 screws (12-15mm)
3x M2 screws (6mm+ for adjustment)
3x M3 (grub-) screws to fix the shaft
Any kind of wire that you can attach to your CNC-controller, a soldering iron and solder.
For adjustment a dial gauge.

For the PCB you can take the "PCB-Ring" from the f3d file and just mill them out, or use the KiCad files from the included zip file to order/etch the PCBs.

Insert the six steel balls into the holes on the PCB and hold them down firmly. Then solder the balls to the PCB, this may need some time as the steelbals need to heat