
B-65222EN/03 APPENDIX C.MAGNET PLATE SURFACE PROTECTION
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C MAGNET PLATE SURFACE
PROTECTION
As shown below, the magnet side of a magnet plate (that faces the
coil slider) is completely coated with epoxy resin selected to endure a
severe use environment.
Iron plate (bottom)
Magnet
Epoxy resin
Cross section of a magnet plate
If foreign matter is caught between the coil slider and magnet plate,
epoxy resin protects the magnets. The most suitable type of epoxy
resin is selected. So, resin may be flawed or chipped, but a serious
and unrecoverable failure such as the peeling of the entire resin
coating involving other peripheral components is unlikely to occur. If
a slight flaw not extending to a magnet occurs, apply epoxy resin of
heat resistant type A or higher onto the flaw to recover the original
height. With such a remedy, the epoxy resin coating can be practically
used permanently.
If a damage that reaches a magnet occurs, a large and hard foreign
material is caught. In such a case, the probability that the coil slider is
also damaged is very high. In this case, perform maintenance
according to Part V, "MAINTENANCE". Moreover, take measures to
prevent foreign matter from being caught in order to protect against
similar trouble.
NOTE
It is recommended that periodic maintenance be
performed according to Part V, "MAINTENANCE" in
order to use the linear motor safely for a longer time.