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Chapter 4 - Commissioning the System
4.4
Using the Brake Release Button
Brakes
Joints 1, 2, and 4 have dynamic brakes that are used only to stop the robot in an emergency
condition, such as when the emergency stop circuit is open or a robot joint passes its soft-
stop. These brakes will not prevent you from moving the robot manually once the robot
has stopped (and High Power has been removed).
Joint 3 has an electric brake. The brake is off when high power is enabled. When High
Power is turned off, the brake actuates and holds the position of Joint 3.
Brake Release Button
Under some circumstances you may want to manually position Joint 3 without turning on
High Power. For such instances, a Brake Release button is located on the robot backplate
(see Figure 2-11 on page 32). When system power is on, pressing the button releases the
brake, which allows movement of Joint 3.
If this button is pressed while High Power is on, High Power will automatically shut
down.
CAUTION: When the Brake Release button is pressed, Joint 3 may drop to
the bottom of its travel. To prevent possible damage to the equipment,
!
make sure that Joint 3 is supported while releasing the brake and verify
that the end effector or other installed tooling is clear of all obstructions.
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Adept 550 Robot Instruction Handbook, Rev A
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