Precor GEN06 Series Service Manual page 140

With +3. 3 Vdc is applied across the potentiometer, the center wiper connection will create a
variable voltage between 0 and +3. 3 Vdc representing the position of the lift or incline. This
variable voltage is applied to the input of a 16-bit A/D converter which converts the analog
voltage into a 16-bit binary numeric representation that the processor can understand.
As the potentiometer voltage changes between 0 and 3. 3 Vdc, the corresponding A/D values
change between 0 and 65507. The processor uses the A/D number to track the lift position.
It is important to note that since the potentiometer is mechanically connected to the internal
gearing of the motor, it would be highly unlikely for a lift motor to go out of calibration without
having physical damage to the potentiometer mechanism.
See Also
"System Diagrams" on page 134
Contact Precor Customer Support at support@precor.com or 800.786.8404 with
any questions.
9 Theory of Operation
Treadmill Base Operation
Page 133