What primary function did the sequence of punched cards serve in the Jacquard loom?

Answer

Controlling which specific warp threads were lifted

The crucial function of the cards was to control which specific warp threads were lifted out of the way for the shuttle to pass through, thereby determining the formation of the pattern.

What primary function did the sequence of punched cards serve in the Jacquard loom?
inventortextileloompunch cardJacquard card