4. DAILY MAINTENANCE AND PERIODIC INSPECTION AND MAINTENANCE
4.1 Maintenance Tools
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4. DAILY MAINTENANCE AND PERIODIC INSPECTION AND
MAINTENANCE
4.1 Maintenance Tools
(1) Measuring
instruments
The following measuring instruments are used to confirm that the voltage is being supplied
correctly to the NC unit, to confirm that the wiring to the NC unit is correct, and to carry out simple
troubleshooting.
Table 4.1 Maintenance tools
Tool Condition
Application
Tester
To check that the wiring to the NC unit is correct
before turning the power ON.
AC voltmeter
Measure the AC power voltage.
The tolerable error is
±
2%
or less.
To measures the AC power voltage being
supplied to the external 24VDC power supply
unit.
DC voltmeter Max. scale 30V.
The tolerable error is
±
2%
or less.
To measure the DC power voltage. External
power supply 24V (control section, machine
input/output interface) Battery voltage HR081
DC output
Phase
rotation meter
To check the connection order of the AC
3-phase input power supply.
Synchroscope
General measurement and simple
troubleshooting
Note 1)
Currently, a high precision digital multi-meter is commonly used as a tester. This digital
multi-meter can be used as both an AC voltmeter and an DC voltmeter.
Note 2)
A logic analyzer (200MHz or more) is required for complicated troubleshooting.
(2) Tools
Screwdriver (large, medium, small)
Radio pliers