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  1. #1
    Join Date
    Nov 2011
    Posts
    2

    Viper200 problem

    I am using a Viper 200 drive to power my mill spindle it works well at higher speeds
    >300 RPM. But at low RPM 60 - 120 the rotation is not uniform it tends to surge
    this causes problems with coordinated moves like tapping.

    What procedure should I use to tune the Viper 200 to fix this problem?

  2. #2
    Join Date
    Feb 2007
    Posts
    966
    What resolution is the encoder ?

  3. #3
    Join Date
    Nov 2011
    Posts
    2
    The recommended 1000 line differential encoder

  4. #4
    Join Date
    Feb 2007
    Posts
    966
    Increase the derivative setting. you can go as high as 4 x that P is.

    I find half the time now with CNC zone there is no reply button to posts and when you loging, it seems to forget and you have to keep loging in to reply. Its frustrating ... please bring back the old cnc zone !

    Larry K

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