Quote Originally Posted by Robin Hewitt View Post
The cheap chinese digital scale resolves 20480 lines per inch but it's hard to get the jitter down to less than 3 counts. I simply dump the bottom two bits and accept a stable 5120 counts per inch (approx .005mm res). Don't forget to clean the grit out if you buy one :D

It's 2x24 bit two's compliment, here's a link...

http://www.yadro.de/digital-scale/protocol.html
Thanks for that. Do you have a link to the 'scales' themselves? I was thinking on the the lines of creating a DRO for the lathe initially, then possibly CNC-ing it later but was being put off by the high prices charged for DROs generally. I have the means to write the software for myself and plenty of hardware available.

Incidentally have you seen http://www.mysmart-tools.com/. Seems like a work in progress, but interesting nonetheless...