Originally Posted by
RCaffin
That thread looks like it's about converting rotary tables to a CNC 4th axis and nothing to do with harmonic drives
Well, first of, I wrote that series of postings, so I do know what they are about.
I started with the option of hanging a stepper on a commercial RT, before outlining the problems with that approach (mainly huge backlash).
Then I went into some detail about how I used a Harmonic Drive to make a good CNC RT. 2nd hand, off eBay, OK price.
I ended up with a lengthy discussion of how I MEASURED the actual performance of the RT once built.
Cheers
Roger