1. An articulated support for a manually-operated power tool, wherein the tool, when mounted on the articulated support, is movable to at least one predetermined tool position in which a selected tool operation is to be performed on a work, the articulated support comprising: a pair of rigid elongated segments connected end-to-end to form a joint permitting rotation of one segment relative to the other segment about a joint axis, whereby a joint angle is formed at the joint; a first sensor generating a first output signal representative of a joint angle formed between the connected segments about the joint axis; and a controller for the power tool receiving the first output signal, wherein the controller determines an indicated position for the tool based at least in part on the first output signal and enable the first operation of the tool when the indicated position is the predetermined tool position.