On Friday 15 July 2016 12:06:43 Kirk Wallace wrote: > On 07/15/2016 08:13 AM, Gene Heskett wrote: > > On Friday 15 July 2016 09:17:20 Daniel Rogge wrote: > >> Kirk Wallace modified G76 for us to accept a taper value. The > >> modified version takes a D parameter for taper, but the lead in/out > >> tapers had to be removed from the cycle for a compatibility reason > >> that I've forgotten. Kirk may have more information. If you are > >> interested I'll send a patch. > >> > >> Rogge > > > > That is another concern that I am coding into this. Losing the > > leadin-leadout is a fatal flaw for this. The tool must be retracted > > enough to clear the thread peaks during the retrace. For boring or > > turning, one can retrace with the tool in contact, but not for > > threading. So I don't think the patch would do me any good. > > > > Thanks for the offer though, Rogge. > > > > Cheers, Gene Heskett > > If we are talking about the same features, you don't lose lead-in/out > or rather X start and retract to a safe zone, just the option of > having additional tapers near the start and end of the thread. In my > opinion, it is best to have stable linear motion in air before > starting the cut, so the lead-in taper is moot.
Agreed. > For the ending taper, > the only reason for this that I could find was to be able to modify > the thread form to help prevent a stress riser, which seems strange to > apply to thread forms. The intent of the upgrade was to have a stable > linear motion in air before starting the cut of the tapered thread, > then do a straight retract in X at the end. That I could live with and it would sure keep me from trying to reinvent this particular wheel because I am getting lost in the math for cutter advance per stroke. AIR there is a variable to control how fast this retract is, then it would still be possible to get a more gentle retract. In what I've done so far, when boring, its a straight pullback to the x starter line. Fortunately I have both a boring bar and an internal threading tool that can work in a 3/8" hole. Thank you very much, Kirk. 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.http://sdm.link/zohodev2dev _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
