Patent ID: 8104388
Filing Date: 2012-01-31
Classification: B23D,Y10T

Abstract:
1. A workpiece feeding device used in a saw machine, the workpiece feeding device comprising: a carrier, said carrier comprising a base frame and being movable, and an angle scale fastened to said base frame; a fence unit, said fence unit comprising a rip fence pivotally mounted on said base frame of the carrier and biasable relative to said angle scale; a magnetic plate assembly mounted on said base frame of the carrier, said magnetic plate assembly comprising a magnetic strip; and a magnetic sensor mounted in said fence unit and spaced from said magnetic strip of the magnetic plate assembly at a predetermined distance, said magnetic sensor being movable with said fence unit to change the angular position thereof relative to said magnetic plate assembly and to measure the angle of said fence unit relative to said angle scale subject to change of magnetic induction between said magnetic sensor and said magnetic strip; further comprising a suspension arm mounted on said rip fence of the fence unit to support said magnetic sensor; and wherein said rip fence of the fence unit comprises a sliding groove; said suspension arm comprises a guide block coupled to said sliding groove of the rip fence to guide sliding movement of said suspension arm along said sliding groove.