John Kasunich wrote: > Jon Elson wrote: > > >>Well, I don't know how well these will perform. The Fanuc A06B >>series of phase-control servo amps ran off 3-phase power, so >>they had 360 conduction pulses a second possible. If the Gettys >>amps run off single-phase, they have only 120 possible >>conduction pulses, which cuts severely into bandwidth. > > > I'd be astonished if they are single phase. Stuart is working on a real > machine (Cincinnati 5-axis) in a real shop with real electricity. > > See http://willepadnos.net/jmkasunich/mpm_cinc508.jpg I know, and the Fanuc amps are always 3-phase, but a number of the Gettys models WERE single-phase, with all the obvious problems that could cause. It saves on SCRs and control circuits, of course.
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