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In the continuous packaging machine, the stepper motor rotates continuously, and the packaging film is uniformly and continuously conveyed. When changing the bag length, it can be achieved by simply using a dip switch.

Compared with ordinary motors, Jin's stepper motors have different control methods. Control the rotation angle by controlling the number of pulses. One pulse corresponds to one step angle. The servo motor controls the rotation angle by controlling the length of the pulse time.

The characteristics of stepper motors mainly belong to three aspects, one is good overload resistance. Its speed is not affected by the size of the load, unlike ordinary motors, which experience a decrease in speed when the load increases. Therefore, stepper motors are used in situations where strict requirements are placed on speed and position; Secondly, it is easy to control. Stepper motors rotate in units of 'steps', with clear numerical features, which brings great convenience to computer control. In turn, the emergence of computers has opened up a broader market for the use of stepper motors; Thirdly, the overall structure of the machine is simple. The traditional mechanical speed and position control structure is relatively complex and difficult to adjust. After using stepper motors, the structure of the whole machine becomes simple and compact.