Idea for DIY Touch Plate - Use a Multimeter

(Loren Baric) #1

Why not just purchase an inexpensive Multimeter and use the Ohm/Buzzer setting.
Plug the 2 leads into the meter. Clip one lead to the cutter spindle.
Attach the other lead (Permanately) to a thin metal plate and your good to go.

No parts to buy. All you need is a suitable plate

Here’s one from Sears for 10 bucks.

(Reiner) #2

That will give you an audible indication when the cutter connects with the plate but has no feedback to the control board to stop the z-axis movement (or any other axis that you would probe on). Therefore you would have to do a very slow axis movement with very little steps. I doubt that this is faster or easier in the end than just doing the same with a piece of paper.
If you want a cheap and easy solution, take the same parts minus the Multimeter and connect the leads to the SO controller board like described in step 3 here. That will allow you to probe with a simple G-Code that takes care of everything.

(Joel Bernstein) #3

And then you could replace one probe with a piece of metal and the other probe with an alligator clip attached to your end mill shank, and you have a touch plate.