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IndustryArena Forum > CNC Electronics > Spindles / VFD > VFD Not Responding to PWM, Starts On?
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  1. #1

    Join Date
    Aug 2019
    Posts
    2

    VFD Not Responding to PWM, Starts On?

    So I just upgraded my Shapeoko to a Huanyang 110v 800w Spindle and a 110v Huanyang VFD

    Have everything wired up, settings in, and it works great with manual control through the VFD. When I switch PD001 to 1 for PWM control I can't get it to respond correctly though.

    Shapeoko PWM to VFD VI
    Shapeoko PWM Ground to VFD ACM
    VFD DCM jumped to VFD FOR

    On powerup, the VFD starts the spindle and brings it to 400hz.

    The VFD starts the spindle even if the shapeoko PWM is disconnected. But even so I verified a DMM reads that the Shapeoko PWM voltage is being modulated correctly based on spindle RPM in GRBL by Universal G-Code Sender, and reaches the VF. PD070 is set to 1 for 5v.

    As you would expect, when the DCM and FOR are disconnected it stops.

    Have searched Google, this forum, no luck. Any ideas?

  2. #2

    Join Date
    Aug 2019
    Posts
    2

    Re: VFD Not Responding to PWM, Starts On?

    Ah! Think I solved it.

    So the biggest problem was there was a jumper on the board connecting VF instead of VI that needed to be moved.

    Then I needed to set PD073 to 0 (instead of 120 as I have read elsewhere) or it would come on with VFD power at 120hz.

    Then I needed to set PD011 to 0 (instead of 120 as I have read elsewhere) or it would not shut of with M5, only go down to 120hz.

    Are those settings safe? Is there a way to have the VFD only activate with a VI that gives at least 120, without it automatically starting or not shutting off?

    Hope this info help someone!

  3. #3

    Join Date
    Oct 2020
    Posts
    3

    Re: VFD Not Responding to PWM, Starts On?

    I have the same issue. My jumper has been moved but the parameters are at 120.

    Did this work for you. Any long term use issues?

  4. #4
    Community Moderator Al_The_Man's Avatar
    Join Date
    Dec 2003
    Posts
    23511

    Re: VFD Not Responding to PWM, Starts On?

    Quote Originally Posted by HartLabs View Post
    So I just upgraded to a Huanyang
    Sounds a bit like an Oxymoron!
    Al.
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.

  5. #5
    Member
    Join Date
    Jan 2005
    Posts
    11655

    Re: VFD Not Responding to PWM, Starts On?

    Quote Originally Posted by HartLabs View Post
    Ah! Think I solved it.

    So the biggest problem was there was a jumper on the board connecting VF instead of VI that needed to be moved.

    Then I needed to set PD073 to 0 (instead of 120 as I have read elsewhere) or it would come on with VFD power at 120hz.

    Then I needed to set PD011 to 0 (instead of 120 as I have read elsewhere) or it would not shut of with M5, only go down to 120hz.

    Are those settings safe? Is there a way to have the VFD only activate with a VI that gives at least 120, without it automatically starting or not shutting off?

    Hope this info help someone!
    PD073=100 minimum setting
    PD011=100 minimum setting

    This is the minimum speed your spindle can run at and you have to have these set or you will damage the spindle

    You have a wiring problem, you can not jumper, FOR and DCM there has to be a switch / Relay to turn this connection On / Off
    Mactec54

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