At 09:29 AM 10/4/2007, you wrote: >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.
Sounds like option P2 or P4. See if this like works. http://books.google.com/books?id=JNnQ8r5merMC&printsec=frontcover#PPA354,M1 This is not a bad book to have as a referance if you are writing G code or CNC control software. An example of a tapered thread with G76. http://books.google.com/books?id=JNnQ8r5merMC&printsec=frontcover#PPA364,M1 I have also seen very course V threads cut in stages. Start by cutting two threads side but side leaving a diamond shape to be cleaned out of the bottom. This is done so that you do not have to take a roughing cut with the full length of the flank. Normally done with multiple calls to G76 but I believe some machines have canned cycles for such things. Cut 1 ____ ______ ______ \\\\\/ \\\\\/ \\\/ \\\/ \/ \/ Cut 2 ____ \ /\\\\\/\ /\\\\\/ \ / \\\/ \ / \\\/ \/ \/ \/ \/ Cut 3 ____ \ / /\ / / \ /\\ / \ /\\ / \/\\\\ / \/\\\\ / \\\\\/ \\\\\/ \\\/ \\\/ \/ \/ __________ Andre' B. Clear Lake, Wi. ------------------------------------------------------------------------- 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
