Deadband
Thanks
Rick
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I was wondering if anyone would have a calculation to establish a value for my "deadband"
Is there a problem with zero?
If so, just increase it until the problem goes away.
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Deadband sets how much either way of my commanded position it is allowed to deviate from correct?
Not quite. It sets a band around the setpoint where the controller doesn't even attempt to correct the position error.
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Take whatever your resolver converter produces when converted to axis unitsI was wondering if anyone would have a calculation to establish a value for my "deadband" . I have read the section in the integrators manual and see the formula if using encoders, but we have resolvers on our machine, and i was not sure how to go about the math to establish a starting point.
Thanks
Rick
and multiply by 1.5 for a starting value. So, if you have 4096 counts/rev and
a 5 TPI leadscrew, then your resolution is 1/(4096 * 5) = 0.0000488 inch.
So, a good starting value would be 7.32E-5
You want to keep this value as small as possible while suppressing annoying
servo dither. If it is too large, it adds a discontinuity in the servo transfer
function as it crosses zero, and can make the loop unstable.
And, of course, if you DON'T have any dither, then use zero.
Jon
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Thanks
Rick
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