In this video I show the location of resistor R19 on Treadmill Speed control board MC-60. Clipping a lead on R19 and raising it out of the circuit allows the treadmill motor to start spinning and ramp up to the last controlled speed.
Background Info: When a treadmill is in use there are only two ways to slow it down to a stop. You can return the speed control knob to zero speed manually or you can yank the emergency stop lanyard which pulls an emergency stop key out of the treadmill. Both methods stop the treadmill. The second method leaves the speed control at its last setting. If you then put the emergency stop switch key back in the treadmill, the treadmill will not begin to move until the manual speed control knob (slide, etc.) is returned to zero and then advanced to a higher speed. This is a safety feature to prevent the treadmill from unexpectedly speeding up to an unknown speed the user might not be prepared for after inserting the emergency stop switch key.
For uses other than treadmills, it might be desirable to have the treadmill motor immediately speed up and return to its last set speed when the stop switch is turned on. To defeat the safety feature, an internet search revealed that removing resistor R-19 from the circuit board will accomplish this goal. In this video R-19 is found and one lead is cut and then the resistor is raised out of the circuit. The treadmill motor will now immediately increase in speed upon applying power via the by emergency stop switch key.
