We characterise the cabling operations on the weight systems of finite
type knot invariants. The eigenvectors and eigenvalues of this family
of operations are described. The canonical deframing projection for t
hese knot invariants is described over the cable eigenbasis. The actio
n of immanent weight systems on general Feynman diagrams is considered
, and the highest eigenvalue cabling eigenvectors are shown to be dual
to the immanent weight systems. Using these results, we prove a recen
t conjecture of Bar-Natan and Garoufalidis on cablings of weight syste
ms.