LiftMaster SL595 SL595 Manual - Page 24

SOLENOID ACTUATED BRAKE The brake minimizes over-travel caused by gate coasting. An added feature of the brake is to assist in preventing back driving of the gate. The brake is spring-applied whenever the motor is not running. Anytime the motor is running, the electric solenoid physically releases the brake. A solenoid brake is standard on SL585/595 operators. The brake is adjusted at the factory and should not need additional adjustment for the life of the friction pad. Replace friction pads when necessary. Refer to the illustration for identification of components for the solenoid type brake system. WARNING To avoid SERIOUS PERSONAL INJURY or DEATH disconnect CAUTION electric power BEFORE performing ANY adjustments. Solenoid Release Lever FRICTION CLUTCH The friction clutch system is not an automatic reversing device. It only serves to minimize damage to the gate operator and gate, and to help minimize vehicle damage. If you need an external automatic obstruction sensing device, items such as gate edges and photo beams are available to help protect pedestrians (page 4). The clutch mechanism must be adjusted properly. During the installation of the operator, you must tighten the clutch spring lock nut so it is tight enough to operate the gate, yet loose enough so that if the gate meets an obstruction, the clutch will slip. 1. Loosen set screws of torque adjustment nut on the gear reducer output shaft. 2. Back off torque nut until there is very little tension on the Belleville washers. 3. Tighten torque nut gradually until there is just enough tension to permit the operator to move the gate smoothly through a complete open/close cycle, but to allow the clutch to slip if the gate is obstructed. 4. Re-tighten the set screw that is directly over the flat portion of the shaft. Friction Brake Plate Pads Assembly AVERT AVERT ATTEN AVER Friction Clutch CONTROL BOARD PROGRAMMING AND FEATURES MOTOR LEARN FUNCTION (FORCE PROFILE) This function is preprogrammed at factory. If either board or motor is replaced, the control board will need to be reprogrammed to "LEARN" the specific motor RPM profile of your operator, the red button "S3" is provided for this. This is important for accurate force control. Failure to do so may result in improper and unsafe operation. NOTE: Motor Learn must be performed in stand alone mode. 1. Ensure that the operator remains attached to the gate throughout the entire process. 2. Press the motor learn button. The yellow LED should start to flash rapidly. 3. Push and hold down either the open or the close buttons. The motor will run for a few seconds and then stop. If the LED goes out the motor is learned. If the unit activates a limit before completing the learn or some other error occurs the LED will go back to on continuously. If this happens try learning while running in the opposite direction. ADVERTENCIA PRECAUCIÓN Motor Learn Button (S3) 24