It can be done with the Bonfig style worm gearboxes. What you need to do is strip the gearbox, remove the bronze wheel and cut it in 'half' (slice?) with a wire cutter. Then mill three slots concentric to the centre on one half and drill and tap three corresponding holes on the other half. When you reassemble the gearbox, slide the one half relative to the other to take up the backlash. This seems to work really well but does require a bit of engineering. We have built some fairly large '4th Axes' like this for not a great deal of money.
Clear as mud? ----- Original Message ----- From: "Kirk Wallace" <[email protected]> To: "Enhanced Machine Controller (EMC)" <[email protected]> Sent: Monday, May 25, 2009 7:00 PM Subject: Re: [Emc-users] Rotary Axis Designs > On Mon, 2009-05-25 at 18:12 +0200, Roland Jollivet wrote: >> What about using an AC motor reduction drive. They're pretty robust but >> I'm >> not sure about the backlash. Usually easy to find as surplus. >> Something like this; >> http://www.bonfiglioli.com/vfpres_uk.html >> >> Replace the AC motor with a stepper. >> >> >> Regards >> Roland > > If the backlash on the worm drive can be adjusted, and I can find one > cheap enough, I can't see why it wouldn't work. It would be fun to make > one of each design, but that's not too likely to happen. Sometimes, I'll > visit a friend or a dumpster and fate will decide what I do. It sure > would be nice to have a little less fate in my life (or not). > > -- > Kirk Wallace > http://www.wallacecompany.com/machine_shop/ > http://www.wallacecompany.com/E45/index.html > California, USA > > > ------------------------------------------------------------------------------ > Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT > is a gathering of tech-side developers & brand creativity professionals. > Meet > the minds behind Google Creative Lab, Visual Complexity, Processing, & > iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian > Group, R/GA, & Big Spaceship. http://www.creativitycat.com > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.339 / Virus Database: 270.12.34/2121 - Release Date: 05/18/09 17:55:00 ------------------------------------------------------------------------------ Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://www.creativitycat.com _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
