I just got the digital caliper you sell. It looks great. I’ve already solved a couple mysteries with it.
Anyway, I noticed that there’re two platic covers. One has the battery in it, but the other just has four contacts. Before I go looking at these with a 'scope, does anyone know what these are for?
I’ve seen CNC people hack them for slide positions. I though it was a PWM output or something similar…
-Nathan
It’s an SPC interface. There’s several different formats out there, but the big ones are Starret and Miyuto.
Here’s the pinout of your scale (scroll down about halfway)
http://www.zietlowdesign.com/products/d … manual.htm
Possible formats are discussed herein:
http://www.matronics.com/cncscale/
I’m betting on the Mitutoyo format, but who knows?
Mitutoyo is the “800 lb. gorilla” in digital calipers and micrometers so I wouldn’t be surprised either.
From looking at the output with a 'scope it looks like it’s sending out data in the Mitutoyo format.
Where can I find (or how can I build) an inexpensive cable to connect to this? I should be alright with the voltage conversions and reading the data.
I bought the spc cable for my mitutoyo micrometer, but having great difficulties getting data from the unit. I was following http://www.sonsivri.com/forum/index.php?topic=29876.0 as a guide, but not seeing any data. Anyone else having some success?
The solution was to ignore sonsivri.com. I now have my Arduino reading data from a Mitutoyo Micrometer. I’ve documented the process at http://arduinotronics.blogspot.com.