How to eliminate multi-axis synchronization interference in motion controller MC

Eliminating interference during multi-axis synchronization in a motion controller (MC) requires addressing three aspects: ground noise, power supply coupling, and signal synchronization. The PWM carriers of the multi-axis drivers should be staggered to avoid the superposition of current peaks caused by simultaneous switching of all axes, thus reducing common-mode noise injection. Each axis's drive power supply should be equipped with an independent LC filter or common-mode choke, such as the CMZ series, to isolate noise coupled between axes via power supply. Communication between the controller and each driver should use fiber optic or isolated electrical interfaces, such as the ADuM series digital isolators, to break ground loops. Synchronization signals, such as enable and alarm signals, are best transmitted differentially with common-mode chokes. For system grounding design, a star grounding configuration should be used, with the controller as the central point and each axis driver's ground wire converging there separately to avoid crosstalk between ground currents. On the software side, a precise synchronization scheduling algorithm should be employed to avoid interference caused by overlapping control pulses due to timing jitter. Multi-axis linkage testing should be conducted to monitor the noise level of each axis's feedback signal, and filtering parameters or grounding methods should be adjusted accordingly.