YASKAWA SIEMENS CNC Series, Maintenance Manual, Serviceman Handbook

Page: 53 / 373

2.3 Installation precautions
2-15
2.3.2 Installing the feed/spindle SERVOPACK
When installing the feed or spindle SERVOPACK in an enclosure, observe the following
precautions:
• Since the SERVOPACK is a wall-mounted type, it must be secured vertically to a wall of
an enclosure with screws or bolts.
• The SERVOPACK must be installed such that checking, replacement or other mainte-
nance work is easy.
• The SERVOPACK must be installed such that its heat sink fins are exposed to the out-
side cooling air to reduce the internal temperature rise. This way the panel can be air-
tight and the size of the heat sink can be designed smaller (see the figure below).
• The flow rate of the cooling air flowing through the heat sink fins must be at least 2.5 m/
s as measured near the fins.
• The outside cooling air must be applied to each heat sink at the specified flow rate.
• The fan producing the cooling air should preferably be made of metal. A plastic fan
could be deteriorated by machining oil, causing the drive to be damaged.
Fig. 2.5 Heat sink as exposed to the outside
Feed/spindle
SERVOPACK
Heat sink
Outside air