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EDM Servo control


ronf1964
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Any thoughts on the best way to control two axis moving in a vector? Right now we are bringing our gap voltage into and analog channel and using timebase following. The problem with this is the process is erratic. We use reverse look ahead to change directions if we drop below our set point.
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You are doing fundamentally what all our Turbo EDM users do. How to tame the motion resulting from the noisy gap voltage measurement to get smooth but responsive motion is the challenge. Unfortunately, those who have done it successfully consider it their "secret sauce" and don't let us know the details. You will have to experiment with various digital filtering algorithms.
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