Inspecting/Replacing Timing Belt - Mitsubishi Electric CR800-D Series User Manual

1.4.2. Inspecting/replacing timing belt

This robot uses a timing belt for the drive conveyance system.
Compared to gears and chains, the timing belt does not require lubrication and has a low noise. However,
if the belt usage method and tension adjustment are inadequate, the life could drop and noise could be
generated. depending on the robot working conditions, elongation will occur gradually over a long time.
The tension must be confirmed during the periodic inspection.
The inspection/replacement method of the timing belt differs depending on the model. Perform
inspection/replacement by referring to "5. Maintenance and Inspection" in the separate volume "Instruction
Manual/Robot Arm Setup & Maintenance".
Timing belt replacement period
The timing belt life is greatly affected by the robot working conditions, so a set time cannot be given.
However, if the following symptoms occur, replace the belt.
1) The belt tension value becomes less than the guideline value.
2) Position mismatch or gear teeth skipping occurs.
3) Cracks or wear occurs on the belt.
4) The tooth bottom of the belt is worn out and the core is exposed.
The timing belt can be replaced by customers; however, if adjustment is not
Caution
appropriate, it could lead to failure of related parts. When the timing belt needs to be
replaced, we recommend that you contact our Mitsubishi Service Department to
request replacement.
If you need to remove the timing belt for repair and others, measure the tension before
Caution
removing the belt.
When installing the belt, make sure to install with the same degree of tension as
before removal.
Failure to do so could shorten the service life of the belt and related parts.
Before starting use 13