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PROBLEM
In some semi-conductor applications the small
amount of electromagnetic interference (EMI) emitted by step motors disrupted precision instruments. To eliminate the EMI, the stators needed to be grounded to the housings.
Conductive tape, soldering a wire to the stator and electrically conductive adhesives were
evaluated as potential solutions. The conductive tape was difficult to apply and often fell off during assembly leaving a high potential for assembly errors. Soldering a wire to the stator and the
housing was time consuming and did not prove to be effective at eliminating the interference.
SOLUTION
After extensive testing, Lin Engineering found that Loctite ? 3888?, a two-part electrically conductive epoxy adhesive, was selected as the optimum solution. To apply the adhesive, the epoxy is mixed in a pre-packaged twin pack. The mixed adhesive is then applied to the interior of the housing with an applicator stick (See Figure 1). Finally, the stator is inserted in the housing and allowed to cure at ambient conditions.
RESULTS
Loctite ? 3888? completely eliminated the EMI with the added benefit that it also structurally reinforced the motor. This has allowed Lin
Engineering step motors to be used in sensitive semi-conductor applications.
Loctite ? 3888? Electrically Conductive Adhesive Eliminates EMI in Lin Engineering Step Motors
Allows step motors to be used in sensitive semi-conductor applications
APPLICATION CASE HISTORY NO. 193
USA
Henkel Corporation
1001 Trout Brook Crossing Rocky Hill, Connecticut 06067 Tel: 860.571.5100 Fax: 860.571.5475
CANADA
Henkel Canada Corporation 2225 Meadowpine Boulevard Mississauga, Ontario L5N 7P2 800.263.5043 (within Canada) Tel: 905.814.6511 Fax: 905.814.5391 MEXICO
Henkel Capital, S.A. de C.V. Calz. De la Viga s/n, Fracc. Los Laureles
55090, Ecatepec, Edo de México Tel: 52.55.5836.1338 Fax: 52.55.5787.9004
Unassembled Housing and Stator Applying Loctite ?
3888 to Housing Inserting Stator Into Housing
北京 ＯＩＯ－８ＯＩ４Ｏ２７８导电胶，导电胶粘剂，导电胶水，导电膏，导电银胶