I'm very surprised by your comments. I have a Tormach 770 and the only time that I've had a TTS slip is when I allowed the power drawbar to become mis-adjusted. Are you ensuring the the TTS shank is clean and free of grease? What is the size of your spindle motor? I only have a 1HP spindle motor but it will stall before the TTS slips.
> -----Original Message----- > From: Gene Heskett [mailto:ghesk...@shentel.net] > Sent: Saturday, April 20, 2019 4:31 PM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] ER ATC tool idea > > On Saturday 20 April 2019 12:20:53 Jon Elson wrote: > > > On 04/19/2019 09:55 PM, Gene Heskett wrote: > > > I'm doing that now, for big ER's in that sheldon, but I > > > had the G0704 spindle in mind, I've developed an abiding > > > hate for R8's and their tool slippage. > > > > Hmmm, I've never had tool slippage with R8 end mill > > holders. I HAVE had slippage on a few occasions using > > collets in the R8. So, except in unusual circumstances, I > > ALWAYS put end mills in an R8 holder, instead of a collet. > > When it did slip, I'm pretty sure I didn't tighten the > > collet enough, or maybe there was a little chip in there > > that crushed out, loosening the collet. > > > > Jon > > > The only way I can be assured that a 3/4" shank of a TTS tool holder will > not slip, rotating in the R8, is if I put an 8 point 5/16" socket in a > 20 volt rattle wrench, and let it rattle for most of a second, > tightening the drawbar bolt about half a turn more that the 10mm end > wrench supplied can. No way can that 10mm end wrench can ever loosen > it, and that socket will be cracked in 50 shots of that. I order those > in 3 packs from grainger. I keep chassis grease on the drawbolts threads > and under its shoulder. But a TTS shank spins in it so easy you'd swear > it was teflon coated. I made those tap hats that are keyed to the r8 > because a 1/4" tap takes enough torque to slip it rotationally either at > the TTS/R8 interface or the collet to tap. The hats are eyed to a notch > I cut in th R8's mouth. No slip. > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > 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) > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
