Abstract: A machine, for example machine for cutting discrete sheets of material from a web, which includes a web supply and a processing station such as a cutoff station, is provided with a variable index drive operating feed structure for moving the web intermittently a predetermined but adjustable distance. The web is advanced intermittently and at which the frequency that varies in direct relation to the continuous speed of an input drive motor. The amount at which the web is fed during each cycle of the intermittent motion is settable by an operator by varying a continuous dial of a variable index drive.