Solution to the interference of stepper motor driver of woodworking engraving machine

Because the general stepper motor and driver housings on the woodworking engraving machine do not use aluminum, titanium, magnesium alloy housings for magnetic shielding, they cause interference to the highly sensitive receiver system, making it impossible to work, and polluting the power supply, causing the control system's single chip and The host computer can not communicate, and the serious one will cause the single-chip computer to crash and cause difficulties for normal use. Therefore, the interference problem must be solved.

The following measures can be taken to solve:

A. Install power filter to reduce pollution to AC power.

B. "One point ground" principle. Shorten the power filter ground, the driver PE (ground) (the driver is insulated from the chassis bottom), the control pulse PULSE- and the direction pulse DIR- after the shorting of the lead wire, the motor ground wire, the cable shield between the driver and the motor, the driver The shielded wires are connected to the grounding posts on the wall of the chassis and require good contact.

C. Try to increase the distance between the control line and the power line (L, N), motor drive line (U, V, W) to avoid crossing. For example, we are dealing with the installation of two drives in the same chassis in a two-axis drive system When in position, the nameplate of one drive is facing forward, and the other is facing back, and these leads should be kept as short as possible in the structural arrangement.

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

After the above processing, the system works reliably.

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