I built a Z axis probe in the last few days. It is NOT for corner or edge finding, purely Z axis. The idea is that it can be used with something like GCode Ripper when doing non flat part surfaces. Think of something like a rifle stock.
Watched all sorts of YouTube vids and did not see anything I really liked nor was I willing to spend lots of money on something I will use infrequently.
Link to a pdf file that shows how it is put together:
You can load the pdf file directly into Aspire to get all the pertinent locations and sizes. I did not go crazy with dimensioning. A pretty simple project really.
And here is a pic:
This one is made from aluminum scrap that I got from the local scrapyard. No reason it cannot be made out of something else. Laminated wood would be a good choice or plastic. The probe itself is a 1/4 inch hex head bolt cut off and ground to suit. Nothing fancy. These things do not need to be real accurate because they do not turn. I included the info for the switch in the PDF, it uses a push button switch (momentary). If you order these switches make sure you select "High Head" so that the button sticks out.
I will use mine in the router collet so I put a shank on top. Again, this does not have be dead nuts concentric, it only goes up and down to activate the switch.
This project has been on the back burner for a while. What was holding me up was how this GCode Ripper software works. The guy's website is less than forthcoming about how it works or even how to install it. Sooo, I had a big daddy tiger talk with Mr Highpockets (John) and he 'splained what I needed to do. Thanks John! Since John was so nice about letting me pick his brain I figured I could share this design in return.
For a couple of bucks it is going to come in handy!
Low Profile CNC Router Vise