Thanks rollfree. I'll get that done that way and post how it goes.
Another question. Since I have been laid up with a broken ankle it has given me time to think about future implementations and projects. i asked this in the Orange Pi thread, but will ask he in terms of the RPi/Mesa option.
I have a small lathe that I have been wanting to CNC, but if I do that, I would absolutely want to have a spindle encoder so that I could have synchronized motion for threading. Also, rather than just a wireless pendant like the mill will have, I would want to put on two hand wheel encoders, one for the X axis and one for the Z axis so that the machine could still be used sort of manually. The axes would be stepper driven.
So for this it seems I would need 3 encoder inputs, and 2 step/direction outputs, plus a few other for limits, etc. In looking at the mesa options for using with the RPi via ethernet, I am unsure which boards would be capable of the 3 encoder inputs. Would a 7i92 be able to do this without another card? Is there another better option for mesa card for this?
Thanks