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#043 Motion Mechanism Design - 13 : Electrical Enclosure Interior Design - 2

Category : Drive mechanism design
May28, 2010

Wiring for machine sections that move at high speeds (upper section of an XY table, linear motor forcer coil, etc.) require special concerns to prevent accidents caused by wire breakage. Additionally, if the moving part carries additional devices such as air cylinders and linear encoders for position measurements all the cables must be handles properly so they do not hinder the movement. To do this, a cable carrier is typically used to manage the wiring to the moving body.

[Photo 1]

While the cable carriers offer increased reliability for moving wirings, it has its own moving deformation resistance that may negatively affect the motion accuracy of the system. Following points are to be considered.

(1) How to use a cable carrier

Points to concernUsage tips
Relationship of available stroke (S) and cable carrier length (L).
(see [Fig.1])
Cable carrier length L = S / 2 + (arc + margin) Margin values listed in catalog
Relationship of bend radius and cable diameter.Bend radius = Cable O.D. x (7~8) approx.
Wire anchoring inside the cable carrier
(see [Fig.1])
Only anchor with zip ties at the ends of the carrier. (Wire breakage occurs if anchored at any other location)
Cable carriers in clean environments.Particulate generation is unavoidable since the cable carriers are made of rubbing components. Use air flow management techniques.
Cable carrier cross section dimensions and cable diameter.Cable max. O.D. = carrier height x 0.8 (or less) Internal clearance = cable O.D. max. x 0.1 (or more)
Cable to cable clearance = cable O.D. x 0.1 (or more)

[Fig.1]

[Fig.2]

MISUMI USA eCatalog