YASKAWA SIEMENS CNC Series, Maintenance Manual, Serviceman Handbook

Page: 336 / 373

16.2 Checking Spindle motors and Invertors
16-7
Motor coupling
status Repetitive runout - - Readjustment by direct-cou-
pled centering
1. Shaft
coupling
2. V-belt Sunk key Viewing Scratch or deformation shall
not exist. Replacement
Shaft coupling without
key Dowel marker shall not be
fit loose. Restoration
Fastening reamer bolt Shall not become loose. Retightening
Wear Wear shall be a little. Replacement
Motor Bearing Hearing, vibration
meter and others
(Check timing: Once
per 12000 hours or 2
years.) Shall be free from abnormal
sound, increase in noise
level, or temperature rise. Consumable parts replace-
ment by disassembling and
necessary care
Cooling fan Hearing, vibration
meter and others
(Check timing: Once
per 15000 hours or 2
years.) Cooling fan replacement
Oil seal Viewing (Check tim-
ing: Once per 5000
hours) Wear shall be a little. Seal is to be replaced by
being removed from a
machine. Contact our ser-
vice group.
Overall check Contact our service
group. (Check timing:
Once per 20,000 hours
or 5 years) - Do not disassemble and
clean the machine.
Table 16.5 Periodical check
Check object Check procedure Criteria Corrective action
Item Method
Note that if you are leaving a machine unused for a long time,
take care the following points:
• If you have installed an auxiliary Inverter that is not used normally, check if it operates correctly
by energizing it every 6 month.
Specifically, if you have not used the electrolytic capacitor for more than 1 year, re-transform it
in the following method.
• Open the emergency stop signal and turn on the power. ("CHARGE" indicator turns off.)
• Close the emergency stop signal. ("CHARGE" indicator turns on.)
• In this state, keep energizing it for 30 minutes.
• Slightly rotate the motor axis once a week so that it may be lubricated well.