Gene, Have you measured the torque needed on the worm gear while cutting? Clamp a lever arm to the shaft and measure the force with a spring scale. The worm reduction multiplies the torque by the number of teeth on the wheel. You may not need a powerful motor. In any case, step-one is to understand what is required.
On Thu, Jul 2, 2020 at 10:03 AM Gene Heskett <[email protected]> wrote: > On Thursday 02 July 2020 10:50:04 andy pugh wrote: > > > On Thu, 2 Jul 2020 at 15:02, Gene Heskett <[email protected]> wrote: > > > Problem #2 is the lack of an independent locking method for this > > > flanges rotation which is also the worm backlash adjustment, > > > > Maybe something like picture 4 here: > > https://www.cnczone.com/forums/uncategorised-metalworking-machines/172 > >314-cnc.html > > That is fairly similar to whats already in the BS-1, except the BS-1 has > only one locking screw. So thats pretty close to what I am looking at, > except the motor, unless it has a builtin gearbox, is obviously too puny > to turn it under a good cutting load. I intend to have the torque to > move it while cutting. I've two tables already, but neither can be > moved when a cutting load is applied. It took me half a day to make a > big drill bit 2 years ago when I was building in a wheelchair ramp, a > job I should have completed in 30 minutes or less because a 270oz/in > motor directly on the worm couldn't do the twist while cutting more than > 2 thou deep per cnc loop. Very slow going on a 3 flute bit. Life's too > short to put up with that BS. > > Another possibility is a right angle worm drive gearbox on a circular > mount, so the motor could be loosened and rotated to clear stuff > regardless of the tilt. > > Something like: > < > https://www.ebay.com/itm/Worm-Reducer-NMRV050-19mm-Input-Shaft-Gear-Ratio-Speed-Reducer-60-1-100-1-Ratio/193329956155?_trkparms=aid%3D555021%26algo%3DPL.SIMRVI%26ao%3D1%26asc%3D225074%26meid%3D4f3a76f9cf8142fcb1041038832557eb%26pid%3D100752%26rk%3D5%26rkt%3D20%26mehot%3Dco%26sd%3D174176794081%26itm%3D193329956155%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplRVIAMLv5WebWithPLRVIOnTopCombiner&_trksid=p2047675.c100752.m1982 > > > > Shaft adapters would need to be made, and a rotate able mounting centered > on the worm shaft would have to be made but thats a heck of a lot > simpler than my original idea. Make the whole thing quickly unpluggable > from the side to protect it from missfires of the hoist. > > What do you all think, do you see any problems I don't in my enthusiasm? > > Thanks all. > > 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) > If we desire respect for the law, we must first make the law respectable. > - Louis D. Brandeis > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
