Stepper motor interference problem solving method - Database & Sql Blog Articles

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In many cases, because the stepper motor has a higher current voltage, such as a stepper motor with a maximum output current of 8A, a voltage of 325V, and its housing is not magnetically shielded with an aluminum alloy casing, it is highly sensitive to the receiver system. Causes interference, makes it unable to work, and interferes with the power supply, especially at high frequencies, which may cause the MCU and the host computer of the control system to fail to communicate normally. In severe cases, the MCU crashes, causing difficulties for normal use, so the interference problem must be solve.

1. Install a power filter to reduce the pollution of the AC power supply.

2. The principle of “one point of grounding”. Cable shield between the ground of the power filter, the driver PE (ground) (the driver is insulated from the chassis base), the control pulse PULSE- and the direction pulse DIR- shorted, the motor ground wire, the stepper drive and the motor The drive shield wires are connected to the grounding post on the wall of the chassis and require good contact.

3. Try to increase the distance between the control line and the power line (L, N) and the motor drive line (U, V, W) to avoid crossover. For example, we are dealing with two of the two-axis drive system in the same chassis. When the drive is installed, one drive nameplate faces forward and the other faces backwards, and the construction is arranged to keep these leads as short as possible.

4. Use shielded wires to reduce external interference to yourself or interference from the outside world (power cord).