User`s manual

7-3
7
Maintenance and Inspection
7. Maintenance and Inspection
7.2 Daily inspection and periodic inspection
Check
point
Check item Check item
Check interval
Check method Criteria Instrument
Daily
Regular
1
year
2
years
General
Ambient
environment
Check ambient
temperature, humidity,
dust.
O
Refer to Chapter
3, "Installation
and Wiring".
Ambient temperature
should be 0°C or
more without freezing.
Ambient humidity
should be 90% or less
without condensation.
Thermometer,
hygrometer,
recorder
Overall
equipment
Check for abnormal
vibration or noise.
O
Visual and aural
inspection
No abnormalities.
Power supply
voltage
Check the main and
control power circuit
voltage.
O
Measure the
voltage between
L1, L2 and L3 on
the robot driver
main circuit, and
between L1C
and L2C on the
control circuit.
Voltage should be
within the specified AC
voltage.
Tester
and digital
multimeter
Main circuit
General
(1) Check connections
for tightness.
(2) Check for evidence
of overheating in
various
components.
(3) Cleaning
Note: Do not perform a
megger test.
O
O
O
(1) Retighten.
(2) Visual
inspection
(1)(2) No abnormalities.
Connection
conductors
and cables
(1) Check the
conductors for
deformation.
(2) Check the cable
sheath for wear or
damage.
O
O
(1)(2) Visual
inspection
(1)(2) No abnormalities.
Terminal
block
Check the terminal
block for damage.
O Visual inspection No abnormalities.
Inverter,
converter
Check resistance
between terminals.
O
Disconnect the
cables from
the robot driver
and measure
the resistance
between terminals
L1, L2 or L3 and
(+) or (–), and
between U, V or
W and (+) or (–)
with a tester or
multimeter of ×1
Ω
range.
Refer to the procedure
described in 7.4,
"Checking the converter
and inverter", in this
chapter.
Typical inverter
replacement interval:
10
6
start/stop cycles.
Analog tester
or multimeter
Smoothing
capacitor
(1) Check for liquid
leakage.
(2) Check for bulging.
O
O
(1)(2) Visual
inspection
(Check for
evidence of liquid
leakage and
deformation of the
case.)
(1)(2) No abnormalities.
Typical replacement
intervals: 5 years
(See capacitor life
curve.)
Relay
Check for chattering
noise at on/off.
O Aural inspection No abnormalities.
Braking
resistor
Check for wire
breakage.
O
Remove the
shorting bar
or wire from
control power
connectors B1-B2
(200V class),
and measure
the resistance
with a tester or
multimeter.
Error should be within
±10% of specified
resistance value.
Tester or digital
multimeter
Indicator
Indicator
(1) Check if the
7-segment LED and
charge lamp light up
correctly.
(2) Cleaning
O
O
(1) Visual
inspection
(2) Clean with
wiping cloth.
(1) Check if the LED
and lamp light up
correctly.
Note 1: The capacitor life is affected by ambient temperature. Refer to 7.5, "Capacitor life curve", as a general guide for
replacement.
Note 2: Refer to the robot user's manual for information regarding the robot.