Maintenance 7. Arm #3
116 LS Rev.10
7.3 Replacing the Brake
Maintenance
parts
Solenoid brake 1 R13B030509
Tools
Hexagonal wrench
width across flats: 1.5 mm
width across flats: 2.5 mm
Force gauge 1
Z: Belt tension
Suitable cord (Length about 800 mm)
LS3: A brake is mounted on the Joint #3 motor to prevent the shaft from lowering down
due to the weight of the end effector while the power to the Controller is OFF or
while the motor is in OFF status (MOTOR OFF).
LS6: A brake is mounted on the motor of Joints #3 and #4 to prevent the shaft from
moving down due to the weight of the end effector while the power to the Controller
is OFF or while the motor is in OFF status (MOTOR OFF).
Move the shaft down to its lower limit before the replacement procedure following the
removal steps.
Push down the shaft to its lower limit while pressing the brake release switch. Be
sure to keep enough space and prevent
the end effector hitting any
The brake release switch affects only Joint #3. When the brake release switch
is pressed, the Joint #3 brake is released.
Be careful of the shaft while the brake release switch is being pressed
the shaft may be lowered by the weight of an end effector.
The brake release switch is applied to both Joints #3 and Joint #4.
When the brake release switch is pressed, the respective brakes of the Joint #3
and Joint #4 are released simultaneously.
Be careful of the shaft falling and rotating while the brake release switch
the shaft may be lowered by the weight of an end
Maintenance: 3.1 Arm Top Cover.