Originally Posted by
A_Camera
Not really necessary for steppers. I know it is common, but overkill in my opinion. What I think might cause problems later is that he is using bare wires, not the type that is meant to be used in this sort of application with constant bending and twisting. The insulation, or the wires inside will wear out very fast, causing short circuits or connection issues, and in the worst case can even cause fire. So even if shielding is not necessary, better quality wiring is definitely a MUST.