While on the subject of G76 being complex already.... I've read that alternating the infeed works well as your tool cuts on leading edge with one pass, trailing edge with the next pass.... Currently an infeed of 29 Deg. moves the X and Z axis in (external threading) decreasing radius and adding to Z axis. It doesn't seem that like it would (should) be too difficult to subtract the Z increment on every other pass. And then EMC would have alternate flank infeed.
----- Original Message ----- From: "Chris Radek" <[EMAIL PROTECTED]> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Wednesday, October 03, 2007 10:54 PM Subject: Re: [Emc-users] Lathe, Tapered threads? > On Wed, Oct 03, 2007 at 10:10:37PM -0500, Jon Elson wrote: >> >> The docs for G76 say it is an error for an X word to be >> specified. Is that a necessary restriction? > > It would be possible to expand G76. But, G76 is already complex with > its support for compound feed, angled in and out, constant area > passes, etc. It's not clear to me what all those things would even > mean while cutting an angled thread. > > The point of G76 in my mind is to let you cut the normal 99% of > threads easily. > > The point of G33 is to let you do any bizarre thing you want (pipe > threads, scroll threads, coil winding??) the other 1% of the time. > G33 gives you total control but it's a basic interface so it takes a > little more effort to cut a full thread. > > If someone wants to add a gcode (G76.1?) for a pipe thread canned > cycle, I think that would be great. I have never had to cut one > though... > > Chris > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a > browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
