Jon, Another way which I use is: bring the spindle down about an inch leave it unlocked with tool installed then bring the knee (servo driving the knee) up contacting the workpiece with cutter. I then lock the spindle, zero out Z and then step jog Z+.010. I run the cycle with the approximate .010 offset and when cycle is complete I check it with depth mic or caliper/rod and step jog the offset correction on Z to the target dimension. Works perfect everytime. I dont gamble on G92 fixture offset/resetting zeros within a part program, there is plenty enough to go wrong without inviting more troubles. To zero out an axis at any time in mach2 there is a convenient "zero" tab right next to the axis value window. Ron
Jon Elson <[EMAIL PROTECTED]> wrote: Tom Hubin wrote: >I gave up on EMC and use TurboCnc primarily because I have found no way >to reliably set the axis values from within a Gcode program. > > Maybe I should describe how I set up my tools on simple workpieces. I lower the tool ontil it is almost touching the work. I then slip a piece of paper that I know is .005" thick under the tool, and jog down until the paper is pinched. I then right click on the Z axis and type .005 and hit the enter key. For X and Y, I use an edgefinder and jog over until the edgefinder deflects to the side, then I stop the spindle (F9). I right click on the axis, enter either .1 (the radius of the edgefinder) or -.1, depending on which side of the part I'm on. Then, hit enter. If I'm doing something that requires changing tools several times, I can put the offsets for the different tool lengths in the tool table, and set up the program to select the right tool offset with G43 H(tool #). Jon Addresses: FAQ: http://www.ktmarketing.com/faq.html FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/ Post Messages: [EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] List owner: [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED] Moderator: [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED] [Moderators] URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO OFF Topic POSTS: General Machining If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble. http://www.metalworking.com/news_servers.html http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list. NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill List Mom List Owner Yahoo! Groups Links --------------------------------- Do you Yahoo!? Take Yahoo! Mail with you! Get it on your mobile phone. [Non-text portions of this message have been removed] Addresses: FAQ: http://www.ktmarketing.com/faq.html FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/ Post Messages: [EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] List owner: [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED] Moderator: [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED] [Moderators] URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO OFF Topic POSTS: General Machining If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble. http://www.metalworking.com/news_servers.html http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list. NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill List Mom List Owner Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
