Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 181)

Chapter 5: Adjustments PC NC Maintenance Manual
5-1
Chapter 5: Adjustments
The table below provides the adjustment procedures necessary following installation of
the YASNAC PC NC.
Table 5.1 Adjustment Procedures
Location Explanation
Interior and exterior of
control cabinet • Examine the exterior of the control panel for contamination/damage.
• Verify the module connections inside the cabinet are tight.
• Examine the cables and lead bundle inside the cabinet are not damaged.
Screw terminals Check the following screw terminals for tightness:
• Power input unit terminal block
• Power ON/OFF button switches on MDI and CRT unit
• Control power transformer terminal block
Check all terminal block covers for dislocation.
External cables • Verify that the cable shield is connected to the ground block through a
clamp.
• Verify that a protective ground wire is installed between the NC and
machine tool.
• Verify that the protective ground wire is of a one-point ground type.
Power input cable Prior to connecting the power input cable, verify that the power input termi-
nals R, S, and T inside the unit are not shorted.
Connector and module
locations and insertions • Verify that the screws on the module clamps are tightened on the CPU
rack.
• Verify that the clamp claws on the Honda connectors are tightened and
that the clamp screws are securely in place.
• Verify that the clamp claws on the power supply connectors are in place.
• Verify that the clamp claws on the flat cables are in place.
Setting • Verify that the control power transformer setting corresponds to the input
power supply voltage.
Input power supply voltage
and frequency • Verify that the power supply voltage and frequency meet the ratings.
• Verify that the input power supply capacity is high enough for power con-
sumption of the control unit.
Composite power supply
unit Verify that the composite power supply unit outputs are not short-circuited.
Check for short-circuits between:
• +5V and 0V
• +12V and 0V
• +24V and 0V
• -12V and 0V