Toshiba TH650A - Adjusting and Replacing Timing Belt; Type of Timing Belt

MAINTENANCE MANUAL
2.6 Adjusting and Replacing Timing Belt
The timing belt 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 timing belt should be replaced with a new one only after the controller
power is turned off with the power supply plug removed. If the work is done
while the power is turned on, you may get an electric shock or the robot may
malfunction, which is very dangerous.
!
CAUTION
• The axis 3 motor is provided with a brake. At replacement of the axis 3 timing
belt, this brake becomes inoperative. Before starting the work, therefore,
move down the ball screw spline to the lower limit. Otherwise, the shaft will
drop due to the dead weight of the shaft or workpiece, and your hand or finger
may be caught.
• Because the timing belt is disconnected, the mechanical home point shifts and
proper control cannot be done. To avoid this, home return operation is
necessary after replacement of the timing belt. For the home return
procedures, see Section 4.
2.6.1 Type of Timing Belt
The timing belts used in this robot are shown below.
When you place an order for the timing belt for replacement, specify the robot model
(TH650A), axis name, type and our drawing number.
Description
Axis name
Width
Type
Our drawing No.
Timing belt
Axis 3 10 mm 705–UP–3M–10–HC S816773
Axis 4 30 mm 575–UP–5M–30–HC S816774
STE 85306
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