MC80 treadmill motor controller schematic

Discussion in 'The Projects Forum' started by MikeML, Jan 6, 2016.

  1. MikeML

    Thread Starter AAC Fanatic!

    Oct 2, 2009
    5,451
    1,068
    Looking for....

    How different from MC60 (found that)?
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    11,156
    2,658
    Here.
    Cannot vouch for accuracy.
    Max.
     
  3. MaxHeadRoom

    Expert

    Jul 18, 2013
    11,156
    2,658
    From what I understand it is a higher motor rated version, maybe the difference is in the switching device size?
    Max..
     
  4. trolley1

    New Member

    Oct 26, 2009
    9
    4
    Recently, an MC-80 Rev A Motor Controller came into my possession. I am using it to adapt my Jet 12-36 wood lathe to use a treadmill motor for its power. That allows the adjustment of the lathe speed from 0 RPM to too much. Since I had reverse-engineered the MC-60 motor controller back in 2009 and that proved useful to others, I decided to do the same for the MC-80 controller. After about a week of eye-straining effort, I have attached the schematic I developed. As before, I do not guarantee that it is 100 percent accurate.
     
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
    11,156
    2,658
    Wow, you are ahead of time did it in Dec 2017!;)

    I am just in the process of documenting a MC-60 rev-J and noticed it is quite a bit different that the earlier ones reverse engineered?
    I thought the later versions, MC-80 etc, were PWM, or maybe just the MC-70?
    Max.
     
  6. MaxHeadRoom

    Expert

    Jul 18, 2013
    11,156
    2,658
    First time I have seen a large (2200μf) cap across the motor on a SCR bridge type controller.
    Max.
     
  7. MaxHeadRoom

    Expert

    Jul 18, 2013
    11,156
    2,658
    @trolley1 How did you obtain the component annotations, most are under the components themselves which often has to be removed to see them?
    Or did you use your own?
    Max.
     
  8. trolley1

    New Member

    Oct 26, 2009
    9
    4
    I was able to move the components slightly and see the designators. For only 1 or 2 items was that impossible and I was able to deduce what they were. I did not put values on the 2% blue resistors. For the life of me I cannot determine the color bands on the blue background. And most of the 2 %ers are in parallel with others making measurement impossible.
    Tom
     
  9. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    6,058
    1,173
    One trick I've used is to get a sharp close-up pic of the resistor, then analyse the R,G,B components of the pic in a graphics editor on my pc.
     
  10. trolley1

    New Member

    Oct 26, 2009
    9
    4
    I will definitely have to try your technique.
     
Loading...