I've got the 6" Mitutoyo quill DRO on my Kondia variable speed BP clone. IIRC, the only thing I had to do that was not in the instructions was to mill a shallow slot in the back of the supplied aluminum mounting bar. The slot is for clearance for the sliding block on the quill feed mechanism. Only need to be .050" deep or so, or you could shim the mount block. It binds if you don't do one or the other.
I don't have a supplied mounting bar. Just the digimatic. The hard part for me is how to attach to the round part with the hole in it that goes up and down. The photo Pete sent me shows a pin that goes into the hole. I guess I could make a pin that is a very tight fit into that hole and it would work. The other option is a two part clamp that would grip that round part.
The pin that goes into the hole has a slot milled into for about half it's length. On the end that goes into the hole, not the end that attaches to the DRO. There is a setscrew at an angle that spreads the split and expands the split end inside the hole. E-mail me if you want a good photo of the arrangement.
The pin IS half of the two part clamp that grips the round part! I tried to show/and explain that in the second set of pictures. I'm Not too good with explanations.
It does not have to grip tightly into the hole, it is pulled sideways by the SHCS to grip the round thing with the mount for the scale slider.
In other words, the piece that clamps against the round thing is what attatches to the scale slider. The round pin that goes into the round thing is pulled sideways, to clamp the piece against the round thing...
I can send more pictures, or disassemble it if needed. Once you see how it works, it is _SO_ simple to make... Easier than any other ideas.
I think I get it enough to make something that will work one of two ways.
turn a round pin that fits snugly into the hole. cut a slit into the portion that goes into the hole along the long axis. Have a setscrew at an angle to the slit that will force the slit open and make a tighter fit.
Turn that same pin and also make something that will fit around the part that goes up and down with the quill. Draw the two together with a screw so the pin can't move.
In either case, the moving part of the dro attaches to that pin.
If I still seem like i don't get it, a picture would be great.
Whatever I wind up doing, I'll photograph it and put it in the dropox for the next guy.
I really appreciate the help and I'd like to do what I can to pass > > I don't have a supplied mounting bar. Just the digimatic. The hard part