I bought one of the FHA-B types and it's the same size as the FHA-C. I've had contact with the manufacturer and they have been quite helpful.
Andy's blog gives an idea of size of the FHA-B and he has castings available. http://bodgesoc.blogspot.ca/2017/05/harmonic.html I've 3D printed a holder for mine that better fits the slots on my mill and still gives me a reference slot. The base is about 8.5" x 5" and the whole thing is about 8" tall. I will be able to swing my 9" faceplate I use on my South Bend Lathe. I had to 3D print it in 4 pieces after drawing it up in Alibre. Haven't yet decided if I'll do a lost PLA casting or add body filler material and use it as a pattern. http://www.autoartisans.com/cnc/FullSize-6.jpg Front view http://www.autoartisans.com/cnc/FullSize-5.jpg Back view http://www.autoartisans.com/cnc/FullSize-4.jpg On Mill. Fullsize-4 shows it bolted on an earlier 1/4 prototype and bolted to the mill table. More than enough room for a collet holder and a mill. I'll be using an STMBL AC Servo drive for it. John Dammeyer > -----Original Message----- > From: Andrew [mailto:[email protected]] > Sent: January-08-18 3:47 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Potential 4th Axis > > 2018-01-09 1:29 GMT+02:00 Gregg Eshelman via Emc-users: > > > What I can't find on those Harmonic Drive brand harmonic drives is one > > single useful bit of information on how big or small they are. All I've > > been able to find are motor size numbers, that appear to be something > > proprietary, they're not listed as NEMA or any other standard, just plain > > numbers. > > If I was going to get one for use on a small mill like a PLM2000, I > > wouldn't want to end up with something a foot in diameter weighing 50 > > pounds, nor would I want to get one so tiny it'd be a flyspec on a large > > mill's table. > > > I can't find FHA-B type either. But here is similar FHA-C actuator with > dimensions > http://www.harmonicdrive.net/products/rotary-actuators/hollo > w-shaft-actuators/fha-c > > PS: Same set cheaper https://www.ebay.com/itm/272996989905 > Larger set 32 size https://www.ebay.com/itm/272996992332 > But these are from China (vs. Korea) > > Just make sure the drive supports step/dir or analog > ---------------------------------------------------------------------------- -- > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
