The development of plastic bag making machines abroad is very fast. Since the 1990s, there has been great progress in technology. In addition to increasingly improved various auxiliary functions, production speed and high efficiency are important aspects, especially in the electrical aspect. Microelectronics technology is widely used, so the performance of the machines has indeed made great progress, which is the direction of development.

The key to improving the functionality of the bag making machine lies in the control part, such as adjusting the length of the bag, adjusting the color code detection, and increasing production speed. In the past, adjustments were made manually. If adjusting the length, it is necessary to carefully adjust the eccentricity value of the crank mechanism, then turn on the bag making machine, check the length of the sample, and repeat several times, which can be quite troublesome. Moreover, due to its intermittent reciprocating motion, the machine vibrates significantly. If a stepper motor is used to directly drive the rubber roller for intermittent reciprocating operation, the pulse number is controlled through electrical circuits to control the length of the motor's working time. A fixed length film can be transported with minimal error, which eliminates the need for a crank connecting rod mechanism and facilitates length adjustment. It also eliminates the need for electromagnetic clutches, brakes, or overrunning clutches, as well as complex and expensive electronic control systems.

The stepper motor (such as 130BC3100) should be equipped with a stepper motor driver and a dedicated stepper motor controller (such as YXD-2) to centralize various electrical buttons. This allows for easy setting of bag making length and other operational items on the control panel using a dialer. Such as machine stop, discharge amount (discharge contact), color coded photoelectric probe switch, machine main switch, welding knife temperature, counter, etc.

The main motor drives the main shaft of the transmission part to rotate, and there is a special cam (optical disc) on the main shaft that can provide signals such as starting and stopping the stepper motor. The machine works in coordination with various set requirements while completing bag making actions such as sealing, cutting, conveying, and color matching.

The production speed of this bag making machine can reach 140-150 times/minute, with a bag length of ≤ 1000mm and a small bag length error of about 0.5-1mm, which is much more efficient than ordinary photoelectric controlled bag making machines.

Due to the fact that all electrical component controllers are produced domestically, including photoelectric probe switches (such as the Futai photoelectric probe produced by a Sino foreign joint venture), proximity switches, etc., which are inexpensive and easy to match, they can be produced independently or supplied as a complete set by specialized manufacturers. This specialized production can provide great convenience for bag making machine manufacturers and also benefit the improvement of overall machine level, providing conditions for the development of more new bag making machines and promoting technological progress.