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  1. #1
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    Aug 2014
    Posts
    102

    BLDC controller with PWM input

    I have a Novakon nm135 with stock BLDC controller and spindle motor. I have no manual but found similar controllers that say:

    PWM--control input-pin 500-5KHz of the PWM control signal 10% -90% of the minimum speed can be controlled to the highest (Recommended frequency: 1KHz)


    I don't know a lot about electronics but I think servo pwm is 500hz? It also looks like 1hkz is the recommended frequency? So 0-1000hz? I purchased a mach3 breakout that says it's capable of 2.5khz. Also has a d/a pwm 0-10v.

    On the controller I see:

    12v
    5v
    NC
    Stop (stop/start)
    F/R (I assume forward reverse)
    PWM
    GND

    I assume the last two are all I need to get the motor spinning at variables speeds but I could be wrong. There is also another 2 pin connector labeled PC1 & PC2 which I have included a photo of. It came wired with a jumper but maybe this could be an alternative 0-10v control?

    I have included the breakout board I have coming. It looks like P1 is the pwm output but it also can do 0-10v.

    Sent from my BE2025 using Tapatalk

  2. #2
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    Jan 2018
    Posts
    800

    Re: BLDC controller with PWM input

    Quote Originally Posted by hax0red View Post

    I have included the breakout board I have coming. It looks like P1 is the pwm output but it also can do 0-10v.
    Sent from my BE2025 using Tapatalk
    PWM and Analog 0-10v are 2 different things.
    You connect a small PWM to Analog 0-10v converter board to use a PWM signal to the Analog of a drive.

    Something like:
    https://www.aliexpress.com/item/32834921874.html

    The PC1/PC2 is most likely a power related item.

  3. #3
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    Aug 2014
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    102

    Re: BLDC controller with PWM input

    Quote Originally Posted by dazp1976 View Post
    PWM and Analog 0-10v are 2 different things.
    You connect a small PWM to Analog 0-10v converter board to use a PWM signal to the Analog of a drive.

    Something like:
    https://www.aliexpress.com/item/32834921874.html

    The PC1/PC2 is most likely a power related item.
    Yeah I know they are different, I was saying PC1/2 might be 0-10v analog.

    It's my understanding that the board I purchased has both PWM support and 0-10v and there are PWM pins on the controller so I wouldn't need any converter if these match up.

    I'm just not sure how to get it working with mach3 but it sounds like I'll have to figure it out.



    Sent from my SM-T860 using Tapatalk

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