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  1. #1
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    Noise level depends on Stepper Motor placement from its drive

    Hi,
    Click image for larger version. 

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    In the image shown,

    In Route A where the stepper motor is placed about 10 meters from the stepper drive. Where as,

    in Route B the stepper drive is placed 10 meters from the control unit..

    Out of these two methods which one is much sensitive to noise or
    which method is good to do?

    I need to keep the distance between the control unit and stepper motor to be 10 meter..

    •   Alt27th September 2016, 09:44

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    Re: Noise level depends on Stepper Motor placement from its drive

    These are high current low impedance paths and I do not see any reason why they should be susceptible to noise.

    You need to worry about noise when there are low voltage, low current and high impedance circuits are involved.

    However, the driver to motor distance should be short because high current pulses are involved and voltage drops are undesirable.


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    •   Alt27th September 2016, 10:07

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    Re: Noise level depends on Stepper Motor placement from its drive

    Hi,

    I agree.

    In detail it depends on a lot of parameters.

    If you have high dV/dt at the motor signals it may produce a lot of EMI. Especially with 10m of not suitable cables.
    If you run the motor lines for 10m then I recommend to use a simple filter on the driver side (to decrease dV/dt) and use twisted pair cables.

    But i tend to prefer short cables to the motor. But then the control lines are the problem. If there is EMI from other devices it may affect signal reliability.
    Therefore Id use differential signaling like RS485 and a CAT6 cable.
    Depending on noise in environment: ESD protection, surge protection, galvanic isolation.

    Klaus


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