So after spending the last few hours looking this thing, I have found the following, this is a 3 phrase brush-less AC Siemens servo, with I believe resolver (no tachometer) feedback to the drive ( for the commutation I would believe) and the encoder I replaced just goes back to the cnc control. As for machine rigidity, when running as it should, this machine cuts hardened D-2 tool steel tube and pipe tooling, and will maintain 0.0005" or better holding commanded size. The machine is roughly a 1992, and has been running fine, up until the last few months, when we noticed this problem.
I had the operator set it up with one of the programs that we have just noticed this happening. WE ran it probably 5 or 6 times, and I noticed that there is no commonality to when it happens, or the frequency as to when it happens, whether the slide is going up, or down it is actually doing it, I was watching the ball screw/motor while during the cut, and it was going up, and while it moving along at roughly 6-8 IPM, I saw the screw make a very slight reversal, and then continue on making the cut in the proper direction. And I saw the same while it was cutting down, the screw was moving along nice and smoothly, then a very slight and quick reversal, and it continued on as commanded. This is happening on straight line moves, arcs, chamfers, any real commanded direction, all of which is making a real mess of the customers tooling we are trying to rework. Absolute stumper,,,, Rick -- Thanks Rick Lair Superior Roll & Turning LLC 399 East Center Street Petersburg MI, 49270 PH: 734-279-1831 FAX: 734-279-1166 www.superiorroll.com ------------------------------------------------------------------------------ Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San Francisco, CA to explore cutting-edge tech and listen to tech luminaries present their vision of the future. This family event has something for everyone, including kids. Get more information and register today. http://sdm.link/attshape _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
