3.
(7)
(a)
(b)
(8)
(9)
CABINET CONSTRUCTION DESIGN
(Cent’d)
To prevent malfunction due to noise, mount the units more
than 100 mm from cables feeding 90 VDC or greater, AC
power lines, and other components. The following
precautions should be complied with during wiring:
Separate AC and DC cables.
Separate the primary and secondary sides of transformers, line
filters, etc.
The front panels of the units that are exposed to the cabinet
surfaces, such as the CNC operator’s panel, tape reader, and
PO unit should be of a dustproof type. However, do not install
them in locations where cutting fluid may directly splash on
them. Be sure to seal completely around the mounting
sections.
Mount the units so as to allow easy checking, removal and
reinstalling during maintenance work.
(10) Read the instruction manuals of the feed servo and spindle drive
units when mounting them. Heat sink should be installed outside
the cabinet to reduce internal thermal losses. This increases the
possibilities for a change from an open type to a totally-enclosed
type and reduces the capacity of the heat exchanger.
● Example
4
RADIATOR
FIN
3-
* \
J-
AIR
FEED SERVO AND
-+ PINDLE DRIVE UNITS
(11) Precautions for Mounting CNC Unit
Observe the following points particularly during mounting of
the CNC Unit:
(a) Mount the unit in the direction shown in Fig. 3.1.
n
n
(DOWN)
(b) Provide spacing of more than 50 mm in the upper section and
100 mm in the lower section of the unit for better ventilation
and easier maintenance.
(c) For ventilation or maintenance, provide spacing more than 50
mm from the upper side and more than 100 mm from the lower
side of the CNC unit.
(UP)
Fig. 3.1 Mounting of CNC Units
2
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