Adjusting The Timing Belt Tension - Yamaha FLIP-X Series Maintenance Manual

3.2
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WARNING
THE MOTOR AND SPEED REDUCTION GEAR CASING ARE ExTREMELY HOT AFTER AUTOMATIC OPERATION, SO BURNS
MAY OCCUR IF THESE ARE TOUCHED. BEFORE TOUCHING THESE PARTS, TURN OFF THE CONTROLLER, WAIT FOR A
WHILE AND CHECK THAT THE PARTS HAvE COOLED.
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WARNING
INjURY CAN OCCUR IF HANDS OR FINGERS ARE SQUEEzED BETWEEN THE DRIvE PULLEY AND BELT. ALWAYS TURN OFF
THE CONTROLLER AND USE CAUTION WHEN HANDLING THESE PARTS.
3
c
CAUTION
Since a positional shift occurs after adjusting the belt tension, return-to-origin or absolute reset must be performed
again and the point data must be re-specified.
Prepare tools necessary for the adjustment work
• Belt tension adjustment bolt (accessory)
1 Turn off the controller power.
2 Place a sign indicating the robot is
being adjusted.
Place a sign indicating the robot is being
adjusted, to keep others from operating the
controller or operation panel.
3 Enter the safety enclosure.
4 Temporarily tighten the motor
installation bolt.
5 Install the adjustment bolt.
Remove the belt cover and install the
adjustment bolt (M5).
6 Apply a tension to the belt.
7 Tighten the motor mounting bolt.
8 Pluck the belt span with a hex.
wrench.
Put the head of the measuring meter close
to the belt and pluck the center of the belt
span with a hex. wrench.
9 Adjust the belt tension.
Adjust the belt tension by measuring the
frequency with the tension meter while
referring to the table below.
Recommended tension meter: U505 (made by UNITTA)
Frequency
(Hz)
207 to 219
0 After the belt tension has been adjusted to the proper level, measure the tension
once again.
After the belt tension has been adjusted to the proper level, retighten the motor mounting bolts and
measure the tension once again. As the bolts are retightened, the tension may increase. So, carefully
check this point.
q Remove the adjustment bolt, and install the belt cover.
3-10

Adjusting the timing belt tension

Tension
Span length
(mm)
(N) (kg)
88 to 98 9 to 10 100
• Tension meter
Step 6
53308-A9-00
Step 8
53309-A9-00
Belt unit
weight (kg/m)
0.051
Applying a tension to the belt
Plucking the belt span with a hex. wrench