Install guide

D. Contains the display LEDs and LED drivers. 12 VDC from the

lower PCB is regulated to 5 VDC, which powers the LEDs.

E. Contains five (5) and eight (8) VDC voltage regulators to power

various circuits on the upper PCB.

F. Contains the memory and processor components

4. Elevation motor

A 120 VAC motor with 345 inch-pounds of torque is attached to a 600-to-1

ratio gearbox. It draws 1.5 to 2 amps nominally, but like all constant

speed motors, it draws five (5) to six (6) times it’s nominal current when

energized (this is called inrush current). Its duty cycle is two (2) minutes.

5. The starter cap

Is a 25uf 250VAC oil capacitor that provides the immediate energy

required (the inrush current) for the elevation motor. The value of this cap

is critical.

6. The elevation potentiometer--“EPOT”

Is a 10-turn 2K ohm potentiometer that functions as the elevation servo-

positioning device. It is fed a voltage from the lower PCB and depending

on its position it variably drops the voltage and returns it.

7. Omron general-purpose limit switches

Are used for calibration and safety only. They are attached to the right

side of the frame next to the elevation rack. They have one (1) input and

two (2) outputs (normally open N.O. or normally closed N.C.). The N.O.

contacts are used, but they are N.O. held closed. The switch opens when

it hits the limits (the indentations on the elevation rack).

8. 2.5HP DC Drive Motor

A. 3025 RPM, 20AMP, 2.5 HP, 100VDC, constant duty motor.

B. The red wire of the motor goes to the positive (+) terminal and black

wire to the negative (-) terminal on the lower PCB.

C. Turns the front roller via a HTD belt, which turns the running belt.

9. Hand Grip (Contact) Heart Rate (HGHR)

The PCB has right and left grip inputs, its own program, and hardware that

output a square wave to the upper PCB. Power and ground are provided

by the upper PCB.

10. Wireless Heart rate PCB

Like the HG heart rate, it also outputs a square wave. Power and ground

are provided by the upper PCB. This PCB has a 30” range and position is

critical.