mc-70 motor controller speed issue

Discussion in 'The Projects Forum' started by jlattin1, Jul 14, 2011.

  1. jlattin1

    Thread Starter New Member

    Jul 14, 2011
    MC-70 motor controller for an image 10.6q treadmill.

    I had no motor output and have since replaced zener diodes 1,2 and 4 and the 1k resister with higher wattage replacements. My motor now runs. :)However, when I try to calibrate the speed @85% duty cycle, I can only adjust the speed pot to 8.4 mph. When I try to walk with a manual speed setting and try to go anything faster than about 2.8mph, it appears limited to a speed of about 2.7mph. Any suggestions?