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IndustryArena Forum > CNC Electronics > Dmm Technology > Need a braking resistor?
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  1. #1
    Join Date
    Mar 2014
    Posts
    62

    Need a braking resistor?

    I'm building a CNC system for a RF45 clone (Opti BF 46). About a year ago, I bought a 3 axis system from DMM; Dyn3 drives and 750 W DST servos. I'm finally finding time to start building the system. Should I buy a braking resistor for each drive? I'm guessing it's probably overkill, but is there any downside to adding them?

    Thanks,
    -Steve

    Sent from my Nexus 10 using Tapatalk

  2. #2
    Join Date
    May 2016
    Posts
    15

    Re: Need a braking resistor?

    I'm curious myself. Also not sure if the Filter is needed on the l1/l2 lines

  3. #3
    Join Date
    Jan 2005
    Posts
    15362

    Re: Need a braking resistor?

    Quote Originally Posted by Windscreen View Post
    I'm building a CNC system for a RF45 clone (Opti BF 46). About a year ago, I bought a 3 axis system from DMM; Dyn3 drives and 750 W DST servos. I'm finally finding time to start building the system. Should I buy a braking resistor for each drive? I'm guessing it's probably overkill, but is there any downside to adding them?
    I think someone is giving you some bad information, a Braking Resistor, would not be needed for a machine like this, or even one twice the size, it is only used for very high speed,with high inertia, if everything is sized correctly, even on large machines it is not necessary for a Braking Resistor for the Servo Drives

    Now for a Spindle Motor it can be good to have a Braking Resistor, for your VFD Drive if you are doing rigid tapping, or want to stop quickly
    Mactec54

  4. #4
    Join Date
    Jan 2005
    Posts
    15362

    Re: Need a braking resistor?

    Quote Originally Posted by BryantKnives View Post
    I'm curious myself. Also not sure if the Filter is needed on the l1/l2 lines
    EMF Filter is needed
    Mactec54

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