MAINTENANCE MANUAL
92
STE 85357
3.4
Replacing Motor
The motor is to be replaced by our service engineer. If it is replaced by the customer,
we will not guarantee any consequential trouble or accident.
!
DANGER
• The motor should be replaced with a new one only after the controller power supply plug is
removed. If the work is done while the power is connected, you may get an electric shock
or the robot may malfunction, which is very dangerous.
!
CAUTION
• When replacing the motor, take careful precautions not to exert a heavy impact on the motor
shaft. Otherwise, the motor and encoder may be damaged.
• NEVER disassemble the motor and encoder. Otherwise, they cannot be used due to
positional shift, etc.
• Once the motor has been changed, the mechanical home point origin (or origin) will shift
and precise control will not be possible. To avoid this, home return operation is necessary
after motor replacement.
For the home return procedures, see “Section 7. Robot Home Point and Position Detector
Error.”
3.4.1
Type of Motor
The motors employed in this robot are shown below. When you place an order for
a replacement motor, make sure of the robot model (THL500, THL600, THL700), the
serial number, the axis name, and our drawing number according to the following
table.
For the location where
the serial number plate is attached, see the “Safety Manual.”
The motor and pulley for Axis 3 are connected using a key. Thus, key alignment is
necessary during motor replacement.
For the type of the key, also see the table below.
