One of my customers sent me one of those Chinese 4th axis harmonic drive chucks. It has a 50/1 ratio. He had me install a servo motor to match up with the 4 axis servo control unit I was building for him. I tested the system and was pleasantly surprised that there was no backlash or spring in the drive. Beware of the ebay sllers that have a timing belt drive calling it a harmonic drive.
Dan Mauch
4th axis harmonic drive
4th axis harmonic drive
Last edited by danmauch on Tue Sep 15, 2015 7:53 am, edited 1 time in total.
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