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Speed Calibration: SPRINT 4/PRG/SST CLOSED LOOP (speed sensor)
1. Enter the O.L.S. Mode (Open Loop Speed) by pressing “FAST” and “START” simultaneously.
2. Adjust the max speed first. Bring the set speed to 12mph. Let actual speed stabilize.
3. Adjust the MAX potentiometer on the pwm motor control board accordingly.
CW = increase speed / CCW = decrease speed. The actual speed will be displayed in the center
display window.
4. Decrease set speed to 1.0mph. Let actual speed stabilize.
Adjust the MIN pot accordingly.
NOTE: This speed calibration procedure is engineered as an auxiliary motor control board adjustment.
In most cases, all pwm motor control boards are pre-set at the factory prior to shipping.
Speed Calibration: SPRINT 3/2/1 /PRG/SST OPEN LOOP (NO speed sensor)
1. Turn machine on, increase speed until 9 mph is displayed.
2. Adjust "MAX" pot on the motor control board until belt speed is between 8.95 - 9.00 mph using a
tachometer (or 83.0 - 83.4 rpm).
3. Decrease speed to 1.0 mph and let belt stabilize (30 seconds).
4. Adjust the "MIN" pot until belt speed is between 0.95 -1.00mph using a tachometer
(or 8.8 - 9.3 rpm counting belt revolutions).
5. Since the "MAX" and "MIN" pots will affect each other during the adjustment, It may be necessary
to repeat steps 2 - 5 several times.
Continue calibration until neither pot needs readjustment.
Formula: Treadbelt Speed 8700 (Standard Length)
1mph x 1rev. x 1hr. x 12in. x 5,280ft = 9.3rpm
1hr. 114in. 60min. 1ft. 1mile
Formula: Treadbelt Speed 8700 XL (Extended Length)
1mph x 1rev. x 1hr. x 12in. x 5,280ft = 8.0rpm
1hr. 132in. 60min. 1ft. 1mile