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CHANNEL MASTER LINEAR ACTUATOR MODEL 6375

12-36VDC

BUILT IN ADJUSTABLE LIMIT SWITCHES

POWDER COATED

18" THROW

UP TO 1,000 LB THRUST (400LB RECOMMENDED LOAD)

SUPPLIED WITH MOUNTING BRACKETS

DESIGNED FOR OUTDOOR USE

These brackets originally made for moving very large satellite dishes are possibly more suitable for closing gates, mechanical machinery, robot wars etc. Our first sale was to a company building solar panels that track the sun!

Two sizes available, 12" and 18" throw.

act12.jpg (71743 bytes)Click to enlarge

act18.jpg (79207 bytes)Click to enlarge

The following text is taken from the 18" version

RETRACTED (LOWER) LIMIT RECALIBRATING

ACTUATOR ELECTRICAL END STOPS

Power is supplied by a reversable 36 volt DC motor driving the
shaft through a gear reduction. The screw shaft causes the
piston rod to travel in and out over its 18" range. An adjustable
limit switch at each end of the travel shuts the motor off when
actuated by the limit rod. A sensor is provided to remotely
detect antenna position.

Terminials 1 and 2 on the terminal strip are connected to the
motor through limit switches LS1 and LS2. Each limit switch is
jumpered with a diode which allows power to flow in the
reverse direction of that which caused the switch to be open. A
positive voltage on terminal (1) will cause the piston rod to
extend. A positive voltage on terminal (2) will cause it to
retract.

The actuator electrical limit switches have been factory calibrated

to engage 1/4 inch before the actuator reaches its mecchanical

end stops (end of acme screw travel).

NOTE: This procedure Must be performed if the inside limit

shaft has been rotated prior to installation on the antenna

system.

1. Place actuator on a flat surface. Hook up the actuator to the

receiver as outlined in the antenna assembly manual.

2. DO NOT restrict inside shaft rotation or travel.

3. Push the button that causes the inside shaft to contract

towards the motor housing. Continue to hold the button

down until the MOTOR stops.

NOTE: The shaft may reach its end stop (mechanical) and

begin to rotate before the motor stops. This is a sign that the

electrical stop is out of adjustment. Continue holding the

button until the MOTOR stops.

4. Now that the motor and shaft have stopped, manually

unscrew the inside shaft 3-4 turns. If the shaft does not

rotate before limit is reached, screw shaft in until motor

rotates, then screw it out 3-4 turns. The arrow label on inner

tube should be even with the wiper on the outer tube. See

sketch.

5. The above procedure will ensure that the electrical stop is

reached before the mechanical stop.
WARNING: FAILURE TO RESET THE END STOP SAFETY SWITCH WILL CAUSE
PERMANENT DAMAGE TO THE GEAR ASSEMBLY & VOID WARRANTY. JACK
MUST NOT BE ALLOWED TO RUN INTO MECHANICAL STOP AT EITHER END OF
ACME SCREW TRAVEL.

CALIBRATION OF ACTUATOR ELECTRICAL EXTENDED

(OUTER) LIMIT END STOP

The actuator electrical limit switches have been factory cali-

brated to engage 1/4 inch before the actuator reaches its

mechanical end stops.
To change these adjustments, follow the procedure below:

1. Set lower limit of travel of actuator when retracted by run-

ning actuator all the way closed (fully retracted).Loosen

four bolts in mounting bracket and slide actuator shaft

through mounting clamp until antenna is aimed a few

degrees below the first satellite closest to the horizon you

wish to receive at the end of azimuth travel.
2. Extend setting if less than 18" travel is desired.

Run actuator shaft out until antenna is aimed a few degrees

beyond the satellite to be received at the opposite end of

azimuth travel. Loosen stroke adjusting rod lock screw and

slide rod towards extension limit switch until contact is

made with the switch button. Tighten screw and check

antenna travel from one end to other of satellite belt.

Replace the motor cover on the actuator.
WARNING: DO NOT EXCEED BEYOND FACTORY SET 18" TRAVEL OR JACK MAY

HIT MECHANICAL END STOP AND CAUSE PERMANENT DAMAGE

AND VOID WARRANTY.
NOTE: Tighten 5/16" clamp bolts to 12ft.lbs.and 1/2" bolts to
25 to 30 ft.lbs.torque.
actw1.jpg (48635 bytes)Click to enlarge

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