Umbrella Tool Changer - Shuttle Motor - Test

Applies to machines built from: 
January, 1989

VMC - Umbrella Tool Changer - Shuttle Motor - Test

This procedure tells you how to check the shuttle motor for a short, the correct resistance, and the correct operation of the clutch arm on an umbrella tool-changer. The image shows a 20-pocket umbrella tool changer. The instructions are the same for a 10-pocket umbrella tool changer.

Push POWER OFF. Set the main circuit breaker to the OFF position. Lock the main circuit breaker. Use an approved lock with an approved safety tag.
Remove the tool changer support arm cover [1] and the cable channel cover [2].

Disconnect the shuttle motor cable [3]. Measure the resistance across the (2) pins at the end of the cable [3] from the motor. The correct resistance is between 5 and 20 ohms. Measure the resistance between each motor cable [3] pins and the ground cable. The correct resistance is open or infinite. If the resistance is not correct, replace the motor.

Remove the tool changer motor cover. Make sure the proximity sensor or mechanical switch cables and the motor power cable [4] have labels for their conenction locations. Disconnect the cables [4]. Remove the carousel motor assembly [5]. Remove the cam follower assembly [6].

Push the carousel motor housing in the direction of the spindle to get access to the slip clutch arm [7]. Manually turn the slip clutch arm [7] through 180° of movement. It should rotate smoothly, but with heavy resistance. If the arm does not move smoothly, replace the motor.

Tools Required

Digital Multimeter

Be aware: Many service and repair procedures should be done only by authorized personnel. The service technicians at your Haas Factory Outlet (HFO) have the training, experience, and are certified to do these tasks safely and correctly. You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes.

Danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not completely understand. Contact your Haas Factory Outlet (HFO) and schedule a service technician visit if you have any doubts about doing a procedure.