On Wednesday 01 June 2016 06:09:49 andy pugh wrote: > On 1 June 2016 at 02:32, Gene Heskett <[email protected]> wrote: > > There's nothing preventing me from boring it tapered and making > > another, smaller than I did for the z motors gear, miniature > > taperlock hub, perhaps with a dozen holes alternating threaded and > > clearance, > > As an alternative, you could consider using a single nut: > The 8th picture down here: > http://bodgesoc.blogspot.de/2016/01/holbrook5.html
Something along those lines. But more than likely a miniature "taperlock" type hub if I can pull off enough precision, possibly by leaveing about 1/4 of the hole in the pulley at shaft diameter (the hub is just over an inch thick) and tapering the rest of it at 7 degrees. So the taperlock wedgeing piece, with a 3 or even 6 bolt drive pattern with a jack out hole between every other hole of the 6 that are tapped, say for 3mm.5 screws. The spinning cap screw heads may need some clearance made in the front face of the z motor mount. Or possibly make a counterbore about .070" deep in the flange. Since the thru hole in that spindle can't pass a stock rod much over 3/4", the outer edge of that flange will probably be "missing" if I make a fresh countershaft thats a full .500" in diameter. Its 10mm now, and if I only bore the pulley coming to 10mm, that would leave more room for drawbolts, if its flange OD is .750", still the 3mm.5's I expect. The pulley on it now had only a coat of green locktite and its set screws, and didn't break loose even as it was stripping teeth off the belt. I expect to have to demolish it to remove it as my only puller is too big and ungainly to use in that small a space even with the motor and jackshaft out on a table. But I've sorted that problem before. Enough times that I am thoroughly tired of it, that lower pulley in the OEM version is abs plastic, and I've burned up at least a 12 pack of them puppy's along with the belt, which strips its even lower profile teeth, and by the time I can hit the big yellow button, the pulley is burned to an unrecognizable mess with the cogs all smeared against each other. Even with the OEM 400 watt motor, this thing was a design error that should have been torn off the napkin and burned in the ashtray, never to have seen fruition even in plastic. Did I mention I'm tired of it? Yes, I am tired of it. > Is the taperlock I > made to hold a small sprocket to a large shaft. The sprocket is bored > to a taper, and the nut pulls the taper through. You need a lathe to > make it, though, which might present you with a problem. That part I actually have working, aleit slowly. In shuffling thru the detrius in the "shop" building here, I found a bag with 3 of the old 1.5 x 70 belts, so I installed one of those. Its working at a light load, but heating the pulleys quite hot if I ask it for more than 150 rpm's, I assume from the belt to gullet missmatch. The same length of XL belt carries 65 cogs, this one has 70. And its pulling .2mm off the diameter of a big block of cast iron per pass. And leaving a vibration pattern even at that light a cut. So I will, when this piece is out of the chuck, be working on the hal file again, to put a siggen in the spindle speed path to put at least a 10% speed wobble with about a 2 second cycle rate, using siggen's sine wave output so the PID isn't pushed too hard to keep up. And trying in my head, to figure out how to make the sine wave output gain be 10% of the requested speed from motion. And at least an on/off button someplace in the axis gui as I don't think I'd want it doing that for a g76 or a g33.1. :) So I may be able to make something suitable. When the McMaster order gets here. I got the receipt, in pdf format this morning. Had to call them to place the order as I am not passing out my unlisted number to any big firm that will sell the damned list. Not open for discussion even. The politicals used up my last bit of patience in the last election cycle when some auto dialer called us up at 3 am to urge us to vote for someone whom I considered as the worst of two evils by a very long row of apple trees. The was indeed the last straw. Thanks Andy. 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> ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
