On Sunday 05 August 2018 13:43:45 Ken Strauss wrote: > > -----Original Message----- > > From: Gene Heskett [mailto:[email protected]] > > Sent: Sunday, August 05, 2018 12:57 PM > > To: [email protected] > > Subject: Re: [Emc-users] Cutter compensation with mill turning > > > > On Sunday 05 August 2018 09:07:29 Ken Strauss wrote: > > > > Looking at the drawings for position 9, page 78 of 738, I too am > > confused. Can we be enlightened? IMO there are only 8 usable > > positions. Which in the practical world, none are 100% accurate > > because no one sets up a tool with the full side of its cutting edge > > inline with either axis. Thats just asking for and usually getting a > > squeak/chatter and a broken insert. > > The I/J parameters on a G10 L1 allow the specification of the > FRONTANGLE and BACKANGLE shown in the drawing. I'm guessing that > 30-degrees is the default for these angles. > Are these angles to be expressed as the angle from the chip centerline, or in an absolute angle assuming 0 degrees is exactly away from the operator? Little but very important details are not adequately discussed, and that has discouraged my use of the tool table.
Lack of a tool changer has also discouraged it, but thats my fault. Every design I have seen, and have been tempted to make, also wants to impinge on the operating envelope in ways its hard to work around. So 3 or so holders along the end of the table are out, as are those I've seen along the back edge of the table. Neither are practical from the standpoint of the uneven weight on the end of the table. And when thats worked around by assuming an intermediate tool transfer arm, controlling such a beast isn't trivial because either it or the tool carrying carousel also has to have either a slide in and out gripper, or a z drive of its own. And it also needs to have effective swarf shielding when its swung out of the way of the heads own z motions. The final idea killer is that within reason, a 2 armed tool changer (me) is still practical because what I do doesn't generate an income anyway. And its an r8 spindle, so the electric driver with a ratcheting hammer drive on the draw bar also needs to be positioned on the drawbar bolt and driven. One of the cats with an air drive would be tons simpler to control. I did find a source of 5/16" 8 point sockets and bought a small bag of them, so I'm no longer worried about splitting the one in current use. That Porter-Cable driver is a serious driver, and will eventually finish off the current socket. I'll have to admit it would be nice to impress the visiting frogs with though. :) > > > ---------------------------------------------------------------------- >-------- Check out the vibrant tech community on one of the world's > most engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > 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) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
