If Motor A reaches its upper limit before Motor B micro-switch M2 opens and the down direction
of Motor A is powered through capacitor C2 (blue line), then reverses direction and that rapid
cycle continues on Motor A until Motor B reaches its upper limit.
This could ultimately damage the micro-switches or/and the brake or/and the end product.
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End product rapidly moving back and forth near
their end limits is the sign of parallel wiring