1. #1
    CNC 3040T-DJ Router

    Mini CNC Engraving T-D Controller

    Hi All
    I was running a job - and accidentally set my z level too low and in the middle of the job, the bit hit the bed and snapped.
    The strange thing is, the spindle won't stop spinning now. Even when i turn the manual speed control up and down and try to switch off the spindle on the control box. I've tried shutting everything down, including the computer, and rebooting. No help. Tried disconnecting and reconnecting the spindle motor. No help...
    Anybody else experience the same issue? What may have gone wrong, and how do i fix it?

  2. #2
    Hi Chilli, welcome to the forum!

    Did you manage to get to the bottom of this? If so what was the fix?
    Last edited by Lee Roberts; 18-11-2016 at 12:54 PM.
    .Me

  3. #3
    Quote Originally Posted by Chilli View Post
    CNC 3040T-DJ Router

    Mini CNC Engraving T-D Controller

    Hi All
    I was running a job - and accidentally set my z level too low and in the middle of the job, the bit hit the bed and snapped.
    The strange thing is, the spindle won't stop spinning now. Even when i turn the manual speed control up and down and try to switch off the spindle on the control box. I've tried shutting everything down, including the computer, and rebooting. No help. Tried disconnecting and reconnecting the spindle motor. No help...
    Anybody else experience the same issue? What may have gone wrong, and how do i fix it?
    I had that on mine too

    There is a little diode in the drive circuit that tends to burn. Without it you are dumping current into a different circuit. There is info on the net for this circuit but if you cannot find it I will try and get a photo for you as soon as I can.

    Regards
    www.emvioeng.com
    Machine tools and 3D printing supplies. Expanding constantly.

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  5. #4
    if your machine is the one I am thinking of

    the IFR630 FET in the PWM motor control will now be short circuited

    check the IFR630 FET and the two 1 ohm resistors that are used to sense the motor current

    ( I expect they are from CNCZONE)
    Click image for larger version. 

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    John

    PS
    found the CNCZONE post -

    http://www.cnczone.com/forums/chines...oc-pw3024.html
    Last edited by john swift; 18-11-2016 at 05:57 PM.

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  7. #5
    Quote Originally Posted by john swift View Post
    if your machine is the one I am thinking of

    the IFR630 FET in the PWM motor control will now be short circuited

    check the IFR630 FET and the two 1 ohm resistors that are used to sense the motor current

    ( I expect they are from CNCZONE)
    Click image for larger version. 

Name:	YOC-PW3024_Diagram.jpg 
Views:	41 
Size:	148.5 KB 
ID:	19645 Click image for larger version. 

Name:	YOC-PW3024-Layout.jpg 
Views:	37 
Size:	148.2 KB 
ID:	19646

    John

    PS
    found the CNCZONE post -

    http://www.cnczone.com/forums/chines...oc-pw3024.html
    John that was the one I was the post I was refering to. Thanks for finding it.

    The Diode D3 is the one that blows.
    www.emvioeng.com
    Machine tools and 3D printing supplies. Expanding constantly.

  8. #6
    Hi komatias

    if that diode goes short circuit its not going the do the NE555 time chip or C4 the 1000uf 16V capacitor any good

    the FET's in the first speed control boards used in the CL300M mini lathe I have are easy to blow
    http://www.model-engineer.co.uk/foru...s.asp?th=38809


    John

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