How to avoid coupling of external cables in motion controller MC

To avoid coupling interference between external cables of the motion controller (MC), it is essential to follow standardized laying and shielding principles.

First, classify the cables: power cables, motor cables, encoder cables, communication cables, etc. Different types of cables should be laid separately, using independent cable trays or maintaining sufficient spacing. If parallel laying is unavoidable, a minimum spacing of 30cm is recommended, and crossings should be perpendicular. All cables should be laid as close as possible to a grounded metal surface. Use shielded cables and properly treat the shielding layer according to the grounding strategy. Avoid forming large loops in the cables. Cables should be kept away from strong magnetic field sources such as transformers and motors. Detailed cable laying diagrams should be drawn during the planning phase. After construction, the induced current on the cables can be measured using a clamp meter, or the coupling strength can be checked using a near-field probe. For unavoidable coupling, ferrite cores can be added to sensitive cables or double-shielded cables can be used. Good external cabling is a crucial aspect of system-level EMC.