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  1. Yahoo1

    motor's current load monitoring

    I am using a AC brushless servo motor (3 phase 220VAC) and want to monitor the current load using a current sensor. My question is: Do I have to use a 3 phase current sensor or a single phase one is ok? Thanks.
  2. Yahoo1

    current mode, velocity mode and position mode in servo control system

    For a servo amplifier, there are current mode, velocity mode and position mode. What is the difference between them. In some control system design, current mode is used even when velocity of the motor need to be controlled. I am really confused at this point. Any artical or book could be...
  3. Yahoo1

    low speed control

    I am using AC brushless servo motor in my motion control system. From the motor's spec, the speed can goes from 0 to 4000RPM. I am wondering how low speed of the motor I can get in my system. If I want 0.01RPM for the motor, what pre-requisite is needed, resolution of encoder, mechanical...
  4. Yahoo1

    AC brushless servo motor with absolute encoder

    Does anybody know which manufacture has product which is AC brushless servo motor with absolute encoder. And usuaully how much more expensive is it compared with an AC motor with resolver or incremental encoder? Thanks.
  5. Yahoo1

    lower speed control

    I am fine tune my motion control system right now and I encountered some issue which frustrated me. I fine tune my system at 9,000psi (which is in 2 in" diameter area). At high speed, it worked fine; but at low speed, I always got overload error and current jump up and down untill reached...
  6. Yahoo1

    encoder counts

    Hello everyone, I am doing some motion control and got some problems. If anybody could give me any advise, it is very appreciated. I am using Baldor's products. AC servo motor with resolver, amplifier receives the reolver's signal and converts it to a simulated quadrature encoder signal then...

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