Chris Radek wrote: > On Wed, Aug 15, 2007 at 01:08:26PM -0400, John Kasunich wrote: >> G33 threading passes are one way to sync "tool" motion with the spindle, >> but maybe not what you want, since each G33 pass waits for an index >> pulse - in a winding application you will still be winding fiber during >> that wait. > > Not quite true - adjacent G33 moves maintain synchronization while > direction of motion changes. If the wire is .020, it seems like you > could get the required motion simply with G33 Z2 P.020, G33 Z0 P.020, > etc etc. >
Cool, I didn't know that. Does G33 stay in sync even if you change the P value? I'm pretty sure some filament winding applications want to vary the pitch. Low pitch windings are strong against hoop stress, but much higher pitches are used for axial and bending stress. I think I've seen fiber wound pressure tanks with fibers at 45 degrees to the centerline. Another area where winding differs from threading is that you do NOT want subsequent passes to repeat - you want them to be interleaved like a multi-start thread with LOTS of starts. I bet you could do that by making the length of each pass a non-integral multiple of the pitch: G0 Z0 (pause to thread fiber) S20 M3 (winding is a slow process) G33 Z20.01 P0.2 (20.01" divided by 0.2" per rev = 100.05 revs) G33 Z0 P0.2 (anther 100.05 revs, now at 200.1 revs) G33 Z20.01 P0.2 (this pass is 1/10 of a rev offset from the first) G33 Z0 P0.2 (repeat for 8 more passes) ... (you now have one layer of 10 fibers at 0.2" pitch, 0.020 spacing) G33 Z20.01 P2 (20.01" divided by 2" per rev = 10.005 revs) G33 Z0 P2 (anther 10.005 revs, now at 20.01 revs) G33 Z20.01 P2 (this pass is 1/100 of a rev offset from the first) G33 Z0 P2 (repeat for 98 more passes) ... (you now have a second layer of 100 fibers at 2" pitch and 0.020 spacing) Seems like this just begs for O-word loops and parameters. Regards, John Kasunich ------------------------------------------------------------------------- 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
