I managed to get the Canadian Rep for the Harmonic Drive to give me an idea of price of the upgraded version of the FHA-25B-6015-E150; the FHA-25C series. Seems, with drive, one goes for almost $4K Cdn. I was asking because I potentially have a commercial project for them. Also turns out that their big market is robotic arms in China and lead time is 39 weeks.
So when you see the older model, brand new on EBAY for $2070US and that's without a drive ($599 US on EBAY) the new price makes sense. https://www.ebay.com/itm/HARMONIC-DRIVE-New-FHA-25B-6015-E150C-FH2000-AC-SER VO-ACTUATOR/232535240729?hash=item36242e3019:g:4bAAAOSwXrdZ7vsm John > -----Original Message----- > From: Chris Albertson [mailto:[email protected]] > Sent: December-21-17 1:38 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Off topic: wolfrom drive > > Buying on eBay means waiting, checking every few days and waiting. But you > do eventually find one. > Part numbers and specs here: > http://www.harmonicdrive.net/_hd/content/documents/hpg-catalog.pdf > > About 15 second into this he tells you how to read part numbers > https://youtu.be/mmOnktzifeg?t=1m33s > > The nam "harmonic" is trademarked so there is only one company making > these. Buy a new one for $850 to $1,200 or for 20% of that used on eBay. > > > As for Prius junkyard parts. They are a little rare as not many have been > junked yet as the cars have only been on the road in numbers to 10 or 12 > years. Car crashes are the only source of parts. Also who really needs > something that powerful? The bike wheel hub seems better. > > But it does look like the 3rd gen Prius uses exactly this drive, two > internal ring gears and two sets of sun/planet gears. > > Do watch the above youtube, this guy as an excellent machinist and explains > what he does. In this case he builds a 4th axis for his CNC Mill and router > > > On Thu, Dec 21, 2017 at 12:34 PM, Gene Heskett <[email protected]> > wrote: > > > On Thursday 21 December 2017 12:39:16 Chris Albertson wrote: > > > > > On Thu, Dec 21, 2017 at 2:12 AM, Gene Heskett <[email protected]> > > wrote: > > > > On Thursday 21 December 2017 04:18:46 Chris Albertson wrote: > > > > > To make this really work for rotary tables you need a very fine > > > > > pitch. I have seen these 3D printed in plastic but they slip and > > > > > don't handle much torque because the outer ring deforms > > > > > One idea I had was to press fit the plastic ring gear into a short > > > > > section of steel pipe. > > > > > > > > > > Put you can buy these drives already made for about $250. That > > > > > is really not abad price for arc-second level precision and near > > > > > zero backlash. > > > > > > > > Where? > > > > > > I wrote that before I figured out how to see the video. On eBay you > > > can fin harmonic drives. They do the something(roughly 1:100 > > > reduction) but actually better accuracy. > > > Here are a few: ebay.com/sch/i.html?_nkw=harmonic+drive... > > > > <https://www.ebay.com/sch/i.html?_nkw=harmonic+drive&_in_kw=1&_ex_k > w=& > > > >_sacat=0&_mPrRngCbx=1&_udlo=50&_udhi=275&_ftrt=901&_ftrv=1&_sabdl > o=&_sa > > >bdhi=&_samilow=&_samihi=&_sadis=15&_stpos=90278&_sargn=- > 1%26saslc%3D1&_ > > >salic=1&_sop=12&_dmd=1&_ipg=50> > > > > All but 1 in that 3 page list do not give a list of dimensions, 2 - 4 > > others only list as needing an 8mm drive end input. Many are obviously > > incomplete even, I certainly cannot come to any conclusion as to whether > > or not I could use one of them in on my small mill with its limited Z > > overhead. > > > > One outfit even goes so far as to show us 3 warehouse racks full of > > boxes, as if we could blow the pix up and see what the box says on it. > > > > And the $170 version seems to be guts only, without the internal rack. > > Maybe I'm to be considered dumb because I don't know them from long > > familiarity with using them, but so is assuming everyone has a pile of > > makers catalogues reaching back 30 years so we can look it up by the > > part number. > > > > Sheesh. > > > > I will say thank you Lawrence, specifically for the code you carved a > > lathe encoder wheel with all those years ago. I've rearranged it some, > > and adjusted the sizes and slot counts, and made a few disks from it > > myself. The one on TLM is about as small as it can be and still be > > functional. I lost another 1/2" of OD trying to fit it into a G0704, and > > just replaced its a/b signals with a 1000 line omron on the rear of the > > motor. The index I still get from the disk on the spindle. Thank you > > for the loan of that code from the wiki. > > > > > > > On Wed, Dec 20, 2017 at 10:15 PM, Lawrence Glaister > > > > > <[email protected]> > > > > > > > > wrote: > > > > > > very cool Gene.... had some troubles playing the video, but I > > > > > > seem to have the gist of it. It does seem like a very > > > > > > interesting design for rotary tables.... just have to figure out > > > > > > how to re-purpose some rear end ring gears and pinions.... > > > > > > hmmm... was thinking of regearing the jeep anyway!. Lawrence > > > > > > Glaister VE7IT > > > > > > > > Now theres a recipe for some bigger machinery, > > > > > > Maybe a better source of parts would be a Toyota Prius viable ratio > > > transmission. It is already set up with planet gears that match the > > > ring. The parts come off without even needing tools. > > > See the ring and planet gear on the left and center of this video. > > > Junk yard price is about $300. Also notice the two electric motors. > > > They could like be repurposed. > > > > Link? > > > > > > -- > > > > > > Chris Albertson > > > Redondo Beach, California > > > ---------------------------------------------------------------------- > > >-------- 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 > > > > > > Cheers, Gene Heskett > > -- > > "There are four boxes to be used in defense of liberty: > > soap, ballot, jury, and ammo. Please use in that order." > > -Ed Howdershelt (Author) > > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > > ------------------------------------------------------------ > > ------------------ > > 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 > > > > > > -- > > Chris Albertson > Redondo Beach, California > ---------------------------------------------------------------------------- -- > 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
