Beginner Simple Cnc Probe

Machine Type:

Other Machine

Materials:

Large washer.
3 M5 screws (I used 8mm)
3 M5 nuts
Wires
Crocodile clip

I wanted a simple probe set Z height for the CNC. The design goal was to make the simplest probe possible. One key requirement was to have some "give" when the tool touches the probe plate in order to not damage the tool edge.

The pictures should pretty much explain the concept. The probe rests on the three screw heads. When the probe touches the plate it should do so in the overhanging end. This way, that side can drop when the tool touches it.

1. Drill 3 holes. Place two of them close to the center but make sure that the of gravity allows for the probe to stand.
2. Attach screws and nuts.
3. Do the wiring.
4. Measure the height of the probe using the most accurate tool at hand. I wrote it down on top of the probe as a reminder.

I think using a heavier washer would have ben beneficial. Another option is to use a thicker washer and tap the holes.