I just got done mounting the X axis on my mini mill. I got a Shumatech DRO 550 DRO/Display box to go with it.
Point of possible interest, although the display only shows .001, the actual scale reports 2560 steps per inch... or .0004 inch resolution. (Technically 0.000390625) Using the Shumatech box to read the scale lets you access that extra rez.
I'm not sure yet how useful that will be. Especially with it being a "cyclic" divisor.... 0,4,8,12,16, back to 0 etc. Although I can dispay it, it does seem pretty touchy. More experimentation will be needed.... I just got it in and haven't had much chance to play with it yet.. it may not even be reliable rez anyway.
Heh, by the way... anyone need an extra Igaging display unit?
[edit.. tons of blank lines, no idea why.]