Gauges Working on DRO
Here's the ARM DRO with a channel working:
The daughter board is plugged in at the bottom left. That has a PIC 12F1822 on it that converts the data form the gauge into I2C which the main board polls in its idle loop. There's room for five more boards across the bottom of the main board. As you can see the gauge reading is on the Z axis in this picture.
I've had two 24 bit gauges working, the third one I had wired was of the 2 x 24 bit packet format, which did work in the past but failed for some reason when I tried it. I'll make some more daughter boards and debug the problem..
The more expensive gauges I got as a trial are ironically less stable when powered off the DRO 1V5 supply so I may move to cheap Chinese gauges as they are also 0.01mm resolution and seem more tolerant to my 1V5 supply.