Yaskawa YASNAC PC NC Maintenance Manual Manuale Utente Pagina 13

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PC NC Maintenance Manual Chapter 1: General Installation and Electrical Connection
1-10
1. The heat generated by the CNC unit varies depending on the addition of
options. The heat generated by the I/O module varies with I/O status.
2. Internal heat generation is the heat remaining inside of the enclosure when the
fin of the servo is exposed outside of the enclosure, and when the external air is
applied to the fin at greater than 2.5m/s
3. The thermal design of the enclosure to house the servo unit varies with
machine specifications, but is acknowledged to use a value of 70% of the load
factor.
Servo Unit
SGDC-05AJ A 28 10 2.5
SGDC-10AJ A 48 12
SGDC-15AJ A 73 15
SGDC-20AJ A 108 18
SGDC-30AJ A 148 22
SGDC-50AJ A 208 28
Table 1.3: Heat Generation (Continued)
Unit Type
Total Heat
Generation (W)
Internal Heat
Generation (W)
Minimum Wind
Velocity for
Cooling
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