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ATM is a machine that receives and pays money. The gate module of ATM separates forgeries from bills and changes the transfer direction of bills. In this paper, the dynamic behavior of the gate was analyzed numerically and experimentally. The moment of inertia of the gate lever, the driving force of the solenoid and the spring force were measured, respectively. And the displacements of the plunger, the input voltage and current were measured experimentally. The measured dynamic behaviors were simulated numerically using Maxwell program which can accommodate the electromagnetic problem of the solenoid. Through the analysis, the design factors were found to make a fast and reliable new ATM gate module. 攀†책임저자;정회원, 성균관대학교 기계공학부E-mail : yschoi@yurim.skku.ac.krTel:(031)290-7440, Fax:(031)290-5849*정회원, 성균관대학교 대학원 기계공학과攀攀