Reciprocating saw comprising a program-controlled feed conveyor for advancing the item to be cut

A mill saw comprising

• (a) a saw frame comprising parallel saw blades cutting only in a stroke direction,
• (b) a slider-crank drive imparting cutting strokes to the saw frame at a given frequency,
• (c) a feed conveyor for feeding stock to be cut by the saw blades in a feed direction,
• (1) the saw blades being cantilevered in the feed direction, and
• (2) the saw frame moving at a cutting speed relative to the stock during the cutting strokes,
• (d) at least one motor separated from the slider-crank drive for intermittently driving the feed conveyor conveying step-by-conveying step during the cutting strokes of the saw frame in dependence on the cutting speed,
• (e) a controlling system connected to the at least one motor, the controlling system comprising
• (1) a stored computer control program for the conveying steps adapted to the frequency of the cutting strokes, the stored control program comprising a first memory for a control program dependent on the speed of the slider-crank drive and a second memory independent thereof for feeding the stock to be cut in dependence on a saw blade disengagement determined by the cantilever of the saw blades, and
• (f) a signal transmitter connected to the controlling system, the signal transmitter transmitting an electronic signal indicating a preset position of rotation of the slider-crank drive to the controlling system.