> -----Original Message----- > From: Gene Heskett [mailto:[email protected]] > Sent: Sunday, August 05, 2018 2:31 PM > To: [email protected] > Subject: Re: [Emc-users] Cutter compensation with mill turning > > 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. >
>From the illustration at the very end of http://wiki.linuxcnc.org/cgi-bin/wiki.pl?ToolTable it appears that FRONTANGLE and BACKANGLE are measured from the centre line of the tool. > 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. > I would also like an ATC but have balked at Tormach's price for such. Tools for my size machine typically weigh far less than a pound each so I'm not particularly concerned about the uneven weight. However, not losing table space is critical. A changer with only four or five tool holders would suffice for most of my work. There are several simple designs such as https://www.youtube.com/watch?v=s11izziBkbs that seem to be a possibility. ------------------------------------------------------------------------------ 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
