I am making a 4th-axis out of an FHA Harmonic drive. This is an integrated system of harmonic drive, crossed-roller bearing and servo motor.
Specs here. I am working with the 25-sized part: http://www.harmonicdrive.net/products/rotary-actuators/hollow-shaft-actuators/fha-c (Note that the -C variant is much harder to interface than the -B variant to LinuxCNC-supported hardware) I have just handed over the pattern to the foundry for a right-angle housing. http://a360.co/2oQX7Ct is the 3D model of the pattern. The inner bore will need to be machined to suit the harmonic drive. I have just checked, and the casting can just about be used with the FHA-17 sized actuators (the mounting flange cleans-up to give a land around the mounting screws, but with a rather generous chamfer) and you _could_ use it with the FHA-32 size if you were prepared to break-through the top semicircle and dress back what is left. I don't yet know how much each casting will cost, but I would guess approximately £75. I should have an estimate later in the week. So far I have 3 spoken-for. One for me and one each for two other folk. Does anyone else want one, bearing in mind that they are likely to be 13kg and postage to (for example) the US would be £50 and Germany £11. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1916 ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
