Re: [CAD_CAM_EDM_DRO] Re: Slight Servo Problem

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>Well mine havent got this problem. Mine are very stiff, cant turn
>them much at all before its solid again, but i'm using a fairly high
>resoloution encoder. Is it possible that this guys encoder counts
>are this far apart?
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No. He has the standard 500 cycle encoders, which provide 2000 counts
in quadrature. So, that would be 360/2000 = .18 degree per count.
Very interesting that you see such a difference. What motors are
you using? The Ametek motors have high resistance, and that makes
me think they may have very high inductance, too! It may be that the
motor inductance is so high that it kills the control laws built into the
gecko drive, and the rapidly oscillating motor current acts to defeat
the integral windup that is supposed to happen.

Do you have external capacitors connected right at the Gecko power
input terminals? I put one on my client's system, and it seemed to
improve the stability and stiffness, but I didn't have much time to
investigate before the cap blew up (I had it wired backwards).

Jon