On Thursday 13 September 2018 05:31:16 andy pugh wrote: > On Thu, 13 Sep 2018 at 00:57, Gene Heskett <[email protected]> wrote: > > The only 2 things I can see that would have > > caused that is the diff in the MT5 tapers because the carriage was > > sitting about 8" down bed from where it was when I made the spindle > > run true. Bed wear, sure as hell. > > It could be tool height.
On a taper, yes indeed. But thats one thing I was being very carefull about. A test touch of the wheel was set up and down until the sparks it threw were dead vertical. Both tapers weren't cut, but were ground by a die grinder mounted to a tool holder on the QCTP. With a tool advancement per pass for the final run that resulted in a very light touch and only an occasional spark. The major concern there was that I really needed a counterweighting rubber band or spring on the rear of the die grinder as its about 3 lbs and about 14" hanging out of the rear. The mounting collar is about 1/4" inboard of the outboard bearing in the grinder so it was taking up all the tilt the crossfeed allowed with gibs set pretty close. When I redo the alu jig, I'll pay more real close attention to that as the alu was/will be carved with an HSS tool since they can be much sharper than run of the mill carbide inserts. I need to get one of those gismo's with the level in it to set tool height, and will get one of the Shars style before I start on that again. Till now I've been touching a feeler blade to check for vertical. And that HSS work really needs a flow of oil to seal the alu from oxidation. Something I am not setup to do with anything but a wet with paint thinner brush. A high pressure mister, pointed at the back of the tool is even better, but coats everything in the building with safflower oil. A PITA. -- 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
