The action actuator of the electric motor type for quantitative packaging scales is generally driven by a stepper motor. The stepper motor is an open-loop control motor that converts electrical pulse signals into angular or linear displacement. It is the main executive component in modern digital program control systems and is widely used. A stepper motor is similar to a regular motor. In order for a stepper motor to function properly, a dedicated stepper motor driver is required to drive the stepper motor to operate.

A stepper motor driver is an actuator that converts electrical pulses into angular displacement. When the stepper driver receives a pulse signal, it drives the stepper motor to rotate a fixed angle (called "step angle") in the set direction, and its rotation runs step by step at a fixed angle. The angular displacement can be controlled by controlling the number of pulses to achieve accurate positioning; At the same time, the speed and acceleration of the motor rotation can be controlled by controlling the pulse frequency, thereby achieving the purpose of speed regulation and positioning.

The wiring terminals of the stepper motor driver for packaging scales generally include: power supply+, power supply -, stepper motor output lines A+, A -, B -, pulse signal (PUL)+, pulse signal (PUL) -, direction signal (DIR)+, direction signal (DIR) -, enable signal (ENA)+, enable signal (ENA) -, among which enable signal is generally not used.

Stepper motor forward and reverse adjustment method: By adjusting the A+and A - wires on the driver wiring plug, the forward and reverse rotation can be changed. Similarly, adjusting B+and B - can also change the forward and reverse rotation.

The stepper motor driver usually has an eight digit toggle switch, with the first three digits set for the working current. By referring to the table in the photo above, the corresponding working current can be set. The larger the working current setting, the greater the power of the stepper motor and the greater the heat generated. The fourth dial switch is used to maintain the locking force at a certain position when the stepper motor is rotated. This force can be set to half and full load, with high locking force and high heat generation at full load. The 5, 6, 7, and 8 bits are the subdivision settings. You can refer to the table below in the photo above to set the subdivision settings. Generally, the subdivision settings cannot be changed arbitrarily. You can use the factory settings, but if you replace the new drive, you should also set the new drive to be the same as the old one.

During the use of the packaging machine, the driver usually does not need to be adjusted because it is pre calibrated at the factory. If the stepper motor does not work properly, first check whether the driver lights up red. If the red light is on, it is generally a fault in the output line or automatic protection. At this time, turn off the main power supply for a few seconds, then connect the main power supply and observe whether the driver lights up green. If the red light is still on, it indicates that the driver is faulty and needs to be repaired or replaced. You can also use the replacement method to check if it is a driver fault. The specific operation method is to replace the abnormal motor driver with other normally working drivers to determine whether it is a driver fault. When unplugging and unplugging the driver wiring plug, be sure to turn off the main power to avoid damage caused by the plug being ignited.

When replacing a drive, be sure to refer to the identification of the new and old drive plugins. Different brands of drives have different positions of wiring terminals. If they are different, be sure to replace the wiring first.