Nick was pretty excited about this recently.
=== From: Randy Replogle On Aug 5, 10:22 am
A guy I used to work with had a sine bar that had a base which was mounted between centers. The actual sine bar was hinged. I think he held the gage blocks and all together with rubber bands. I suppose he used a dead center under pressure to keep everything from moving.
Randy**Dammit**! That is the super-precision way I have been looking for since long!
Thanks a lot!
I just recently came across several patents using a sine bar to do this. See:The first one looked the most promising if someone was going to try making one. I don't know if these were ever produced by anyone. Maybe someone here will know once they look at them.