Yaskawa YASNAC PC NC Connecting Manual - Manual (Page 29)

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YASNAC PCNC Connecting ManualChapter 1: General
1.3.2 Dust proof Design
Dust proof Design and Construction
PCNC units and other components (especially CRTs) housed in a machine tool enclosure are
exposed to an environment with airborne matter, e.g., dust. oil, coolant mist, etc.Since these
elements could cause control component malfunction, enclosures should be designed and built
to prevent such matter from entering as follows:
• Use an air-tight enclosure.
• Seal the cabinet inlet with packing material. Refer to Fig. 1.3.2.1.
• Secure the rear door lid with packing material. Refer to Fig, 1.3.2.2.
• The enclosure’s front surfaces with PCNC operating panels and are dust proof, but do not
install them where liquid coolants are present. The periphery should be sealed with suitable
materials.
The CRT unit’s high voltage will attract airborne dust, so when mounting the CRT unit’s
pendant box please take note of the following:
1. Seal the cable inlet, door, rear lid opening clearances with packing material.
2. The CRT Unit’s mounting surface has been factory sealed.
3. Seal any other openings.
4. Since oil will enter the enclosure through screw holes and collect on the
internal ceiling surface, apply suitable packing material to seal these holes.
Metal fitting
Packing
Cable
Fig. 1.3.2.1 Cable Inlet