5.2 Digital Torque Amplifier Inspection
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5.2 Digital Torque Amplifier Inspection
Digital torque amplifier inspection is summarized in the table below. Although there is no
need for daily inspection, perform inspections at least once per year.
■ Component Replacement Timeline
The components in the table below are subject to mechanical wear or degradation over
time. Inspect these periodically for purposes of preventative maintenance.
Digital torque amplifiers overhauled by Yaskawa are shipped with their system switches
returned to their factory default settings. Be sure to verify these switches before
operating.
■ Use Conditions
• Ambient Temperature: Yearly average 30°C
• Load Ratio: 80% or less
• Operation Rate: 20 hours or less per day
Table 5.2: Digital Torque Amplifier Inspection
Inspection
Item
Inspection
Period
Inspection Content
Measures Taken at
Error
Unit, Board
Cleaning
Once per year
minimum
There should be no grime,
dust, or oil on the unit.
Clean with air or cloth.
Loose Screws
Once per year
minimum
There should be no
looseness in the terminal
block and connector
mounting screws.
Tighten
Component Fault
in Unit or Board
Once per year
minimum
There should be no changes
in coloration due to heat,
damage, or wire breakage.
Consult Yaskawa.
Table 5.3: Periodic Inspection of Components
Component Name
Standard
Replacement
Period
Replacement Method, Other
Cooling Fan 4 ~ 5 Years Replace with a new item.
Smoothing Capacitor 7 ~ 8 Years
Replace with a new item. (determine by
inspection)
Relays
―
Determine by inspection
Fuses 10 years Replace with a new item.
Discharge Capacitor on
Printed Circuit Board
5 years
Replace with a new board. (determine
by inspection)
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