3.ASSEMBLY HANDLING, DESIGN, AND ASSEMBLY B-65382EN/02
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3.4 ASSEMBLING THE MAGNET PLATE WITH PROTECTION
COVER
3.4.1 Notes on Attachment
The width of the magnet plate with a protection cover is 15.5 mm.
Since the protection cover itself is slightly warped, however, an air
gap of 0.5 mm may cause rubbing. Therefore, when the protection
cover is attached, set the air gap to 1.0 to 1.5 mm, which is wider than
usual.
When the air gap becomes wider, the maximum force is reduced.
Widening the air gap also reduces magnetic attraction, improving the
feed smoothness. For reduction in the maximum force and magnetic
attraction, see Section 2.3, "LINEAR MOTOR AIR GAP" earlier.
3.4.2 Precision of Joined Magnet Plates
When multiple magnet plates are joined, the straightness of the datum
planes of the magnet plates must be ±0.1 mm or less for proper
attachment of the protection cover. Measure the straightness by, for
example, pushing the plates against the stoppers with a height of
approximately 1 mm, as shown in the figure below.
Datum
plane
Datum
plane