Mitsubishi Electric CR750-D Series, Instruction Manual

Page: 117 / 126

5Maintenance and Inspection
Inspection items 5-105
5.2 Inspection items
The controller inspection items are shown below.
Refer to section "Maintenance and Inspection" in the separate manual "Robot arm setup and maintenance",
and inspect the robot arm at the same time.
5.2.1 Daily inspection items
Carry out daily inspections following the procedures given in Table 5-1 .
Table 5-1 ： Daily inspection items (details)
5.2.2 Periodic inspections
Carry out periodic inspections following the procedures given in Table 5-2 .
Table 5-2 ： Periodic inspection items (details)
Procedure Inspection items (details) Remedies
Before turning the power ON (Check the following inspection items before turning the power ON.)
1 Is the power cable securely connected?
(Visual)
Securely connect.
2 Are the machine cables between the robot arm and controller securely
connected?
(Visual)
Securely connect.
3 Is the controller cover cracked, has any foreign matter adhered, or is
there any interference? Replace with a new part, or take remedial measures.
After turning the power ON (Turn the power ON while monitoring the robot.)
1 Is there any abnormal movement or noise when the power was turned
ON? Refer to the Troubleshooting section and remedy.
During operation (Try moving with an original program.)
1 Check that the operation point is not deviated. If deviated, check the
following items.
1) Are any of the installation bolts loose?
2) Are the bolts at the hand installation section loose?
3) Is the position of the jigs, other than the robot, deviated?
4) If the positional deviation cannot be eliminated, refer to
"Troubleshooting", and remedy. Refer to the Troubleshooting section and remedy.
2 Is there any abnormal movement or noise?
(Visual)
Refer to the Troubleshooting section and remedy.
Procedure Inspection items (details) Remedies
Monthly inspection items
1 Are any of the connector fixing screws or terminal block terminal
screws loose? Securely tighten the screws.
2 Is the controller filter dirty?
(Visual)
Clean or replace with a new part.
Inspect, clean and replace the filter by refer to
Page 109, "5.3.2 The check of the filter, cleaning,
exchange."
.
Yearly inspection items
1 Replace the backup battery in the controller. Exchange it referring to Page 106, "5.3.1 Replacing
the battery" .