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SERIES 90 MODUTROL IV™ MOTORS
63-2190—3 8
SETTINGS AND ADJUSTMENTS
Before Setting Stroke
1. Remove the top cover from the motor.
2. Disconnect the controller from the motor.
3. Connect a potentiometer to the motor as shown in Fig. 7.
IMPORTANT
Detach linkage from motor before adjusting stroke.
Setting Stroke
On adjustable stroke motors, stroke is field-adjustable
between 90° and 160°:
• The mechanical adjustment (cams) establishes the fully
open (clockwise, as viewed from the power end) and fully
closed positions of the motor shaft.
• The electrical adjustment (trim pot) matches the feedback
resistance change to the motor stroke.
• TRADELINE motors are shipped with stroke set at 160°.
CAUTION
Careless Installation Hazard.
Use of excessive force while adjusting cams
damages the motor.
To avoid damaging motor end switches, set cams by
moving only the top of the screwdriver.
CAUTION
Careless Installation Hazard.
Forcibly turning the motor shaft damages the gear
train and stroke limit contacts.
Never turn motor shaft manually (by hand or with a
wrench).
CAUTION
Equipment Damage Hazard.
Can damage the motor beyond repair.
Set cams by moving the top of the screwdriver only.
Pressing screwdriver against cam slot sides or use of
excessive force can damage motor end switches.
1. Adjust the trim pot:
a. For 160° stroke, turn trim pot fully clockwise.
b. For 90° stroke, turn trim pot fully counterclockwise.
2. Drive the motor to mid-position by jumpering R-W-B.
3. Adjust the cams:
a. For 160° stroke:
(1) Insert 1/8 in. screwdriver blade into an inner cam
slot and move screwdriver top as far as possible
counterclockwise (viewed from power end).
See Fig. 9. Repeat in successive cam slots until
inner cam is against the counterclockwise stop.
(2) For low torque motors (75 lb-in. or less), skip to
step 4.
(3) Insert 1/8 in. screwdriver blade into an outer cam
slot and move screwdriver top as far as possible
clockwise (viewed from power end). See Fig. 9.
Repeat in successive cam slots until outer cam
is against the clockwise stop.
b. For 90° stroke:
(1) Insert 1/8 in. screwdriver blade into an outer cam
slot and move screwdriver top as far as possible
counterclockwise (viewed from power end).
See Fig. 9. Repeat in successive cam slots until
outer cam is against the counterclockwise stop.
(2) For low torque motors (75 lb-in. or less), skip to
step 4.
(3) Insert 1/8 in. screwdriver blade into an inner cam
slot and move screwdriver top as far as possible
clockwise (viewed from power end). See Fig. 9.
Repeat in successive cam slots until inner cam
is against the clockwise stop.
4. Check the motor stroke before connecting the linkage:
a. Remove R-W-B jumper.
b. Short R-W. The motor should drive fully clockwise
(viewed from power end).
c. Remove R-W jumper and short R-B. The motor
should drive fully counterclockwise (viewed from
power end).
5. Reconnect the controller, replace the motor top cover,
and attach the linkage to the motor.
Fig. 5. Terminals and adjustments.
STROKE
ADJUSTMENT
CAMS
INNER AUXILIARY
SWITCH
INNER AUXILIARY
SWITCH CAM (BLUE)
POWER
END
OUTER AUXILIARY
SWITCH CAM (RED)
OUTER AUXILIARY
SWITCH
ADJUSTABLE STROKE POTENTIOMETER
HIGH TORQUE (150 lb.-in., 300 lb.-in.) MODELS HAVE TWO
YELLOW ADJUSTMENT CAMS. LOW TORQUE MODELS HAVE
ONLY ONE BROWN INTERNAL STROKE ADJUSTMENT CAM.
NOTE: NOT ALL FEATURES AVAILABLE ON ALL MODELS.
M17625A
B
W
R
T2
T1
1
1