On Monday 15 June 2015 12:44:08 Gene Heskett wrote: > On Monday 15 June 2015 06:35:17 andy pugh wrote: > > On 15 June 2015 at 03:05, Gene Heskett <[email protected]> wrote: > > > There is not room on the spindle for a taperlock, > > > > My servo motors have a tapped hole in the end of the spindle, and I > > used this to make my own taperlock. > > I bored out the pulley with a tapered bore (on my lathe, which might > > be a bit of a catch-22 for you) and then made a thin sleeve with a > > matching taper that was split and then fitted to the motor spindle/ > > A bolt then pulls the pulley down on to the taper, squeezing it down > > onto the servo shaft and locking the pulley to it. It has worked > > well so far. > > Hummmmm, this might be possible. If the insert was pushed against the > plastic sleeve that holds the nut tension against the end bearing, and > the split was wide enough to make room for the 5x5x10mm key, and the > adjusting nut was used to push it onto the sleeve, a fit could be > achieved that might work. If the taper was similar to the steep part > of an R8 collet, it shouldn't be too hard to knock loose, steeper > taper IOW than the 7 degrees of a taperlock. How steep should it be > in order to be more or less self releasing when the nut is loosened? > I know, look it up in #27. :) Steel sleeve, 100
Damn ancent fingers, that s/b 10mm > thick hub at the bore > location, its 1/2" thick now. There are finer grooved belts than the > motor pulley has, but since the pulley is also the cooling fan, I'd > druther not change, meaning I'll have to make a rim thats wider to use > the existing poly belt, which IIRC is 9 of the more or less std groove > size, or about an inch wide. If I put the 10mm that sits on the > sleeve/shaft, dead center to the pulley face, there shouldn't be > enough sideways force to waller it out if it does work loose. I am > thinking of a sheet of 1/8" screwed to the end of the head, bigger > than the pulley, from which I can set some pillars, the ends of which > will then be where the encoders mount will be. The OD of the pillars > would then support a swarf shield of sorts. I like it. > > If I can find some slot interrupters that mount from the side, I > should be able to make a disk, a bit smaller that the pulley rim with > the slots in the ID. > > You are always the source of a way to do it even when I am burned out, > thanks Andy. > > You were the source of the Wohlhaupter idea that I have used twice > now, to extend a too short screw into the machining that should have > been done to the screw were it long enough and extend it into the end > thrust bearing and motor coupling in one case, on the lathe, the > anchoring bearing for X is the front of the slider, but the motor is > off the back of the screw. Swarf shielding however has been a problem > as its too easy to drive it past 0.00 and crush the shielding. On the > lathe the limit/home switch is about .05mm from the end of outward > travel, so if the switch doesn't trip, neither is it crushed. Biggest > problem has been remembering to clean off the swarf on top of the > carraige before hitting ctrl+home. > > > It is possible to bore a taper on a CNC milling machine but you need > > a boring and facing head. > > Why? Is it not possible to write a G2 or G3 that in addition to > spiraling down, tapers as it spirals? Maybe with the canned > threading, I know I have cut pipe tapered threads that way several > times. Just checking, I wrapped a G33 in quite a bit of math on the > lathe, and I don't see why I could change the bit to scrape a smooth > taper and run it at .002 tpmm. Cobble job, but should work. Drive as > an outside taper to 27.95mm od at small end of cut, then bore to > 28.00mm should crack/part it off. On the lathe, but could be done on > the mill if it had an encoder. The GO704 WILL have one. So will the > little mill, if I ever get the damned pulleys made to make it a belt > drive. :( This one idea has started a chain of events it may take me > a year to get it all done. I hope I have that year. The medics are > screwing around with a pulled muscle or something thats pissing me off > with the amount of time being killed just to do a damned MRI. I've > been laid up in excruciating pain for 3 weeks last Saturday & the MRI > isn't scheduled till the 23rd. Thats bull shit, enough of which will > grow 200 bu/acre. :( > > > http://www.cnczone.com/forums/vertical-mill-lathe-project-log/109301 > >-c nc-post1357394.html#post1357394 > > Cheers, Gene Heskett 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> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
