On Tuesday 26 November 2019 01:18:27 Andy Pugh wrote: > > On 26 Nov 2019, at 01:21, John Dammeyer <[email protected]> > > wrote: > > > > Nope. One tooth valley at a time with a gear cutter on an arbor > > It’s worth considering hobbing, in theory it makes better gears and > jobs are fairly cheap on eBay, compared to a full set of involute > cutters. > > To cut helical gears (regardless of spindle orientation) you need to > move A in proportion to X. If you have enough control of A to do that > you might as well link it to the spindle encoder. It’s a few lines of > HAL code. > > A tilting dividing head (like the BS0 pattern) could be used with a > fixed vertical spindle and coordinated XZA moves and an involute > cutter, though. > Based on that, I have hungrily looked at the BS0 type devices, and wondered why no one has put a stepper drive on the index shaft, with sufficient geardown to resist cutting forces, to put that all under LinuxCNC control. Seeing it done by hand on you-tube, I can certainly visualize a stepper mounted on the back of it, with a big timing belt pulley in place of the hand crank now used to handle the repetitive manual cranking and pinning. Or perhaps the pinning for position locking might need done with a small solenoid, tallied by a switch? There is darned little you cannot do with LinuxCNC and its code, either in gcode or hal. So I don't see why somebody hasn't already done it. Is there some feature of the BS0's construction that disallows its being motorized?
So I just bought a BS-1 kit and some lathe dogs since I don't have any. The rear looks plenty flat enough to carry a motor mount, and I can make its own drive pulley's with it. All I need is time & giddyup. > _______________________________________________ > 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) 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
