A crown molding jig device may include first and second frames. Each of the first and second frames may have a vertex portion, and first and second legs extending from the vertex portion. The second legs of the first and second frames may define a recess between. The first leg of the second frame may define first and second slots. The crown molding jig device may include first and second adjustable studs carried by the first leg of the first frame, and being slidably received by the first and second slots so that the recess is adjustable in size.

Gauge system, including methods and apparatus, for positioning workpieces according to entered and/or calculated target dimensions and processing the workpieces with a tool to generate products having the target dimensions.

A guide assembly, or rip fence, supported by guides of a table saw includes a clamping apparatus having locking mechanisms located at each end of the guide assembly. Each of the locking mechanisms is independently adjustable to provide accurate and repeatable positioning of the guide assembly with respect to the table and with respect to the saw blade with self-alignment and desired force. An adjustable locking self-alignment spring provides for self-alignment of the rip fence with respect to the blade.