Control system for veneer slicer
AssigneeDavid R. Webb Co., Inc.
InventorGeorge Weil
Life of this patent
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Abstract
According to the present invention, a control system is provided for advancing and retracting the knife and pressure bar carriage of a veneer slicer. This system replaces the conventional feed screw carriage actuator and permits the knife and pressure bar tilt mechanism to be eliminated. The control system includes a hydraulic linear actuator for incrementally advancing and retracting the carriage and a programmable linear motion controller for controlling the sequence in which the linear actuator advances and retracts the carriage and the distance which the linear actuator advances and retracts the carriage. The controller includes a memory into which a program is loaded. The program determines the sequence, direction and distance that the linear actuator advances and retracts the carriage.
Claims11
In a reciprocating veneer slicer comprising a flitch table providing a mounting surface, means for securing a flitch to the mounting surface, a knife and pressure bar assembly movable along a path toward and away from the mounting surface, the flitch table being reciprocable between first and second opposite positions transversely relative to the path of the knife and pressure bar assembly in a cutting and return stroke, the improvement comprising a linear hydraulic actuator for advancing the knife and pressure bar assembly toward the mounting surface prior to the cutting stroke to provide a uniform depth of cut and for retracting the knife and pressure bar assembly away from the mounting surface after the cutting stroke and prior to the return stroke, the linear hydraulic actuator advancing and retracting the knife and pressure bar assembly in indexes, an index comprising one or more steps of uniform incremental distance, advance indexes after an initial index consisting of an equal number of steps, retract indexes prior to a final retract index consisting of an equal number of steps, the depth of cut determined by the difference the number of steps in the advance and retract indexes.
A reciprocating veneer slicer comprising a reciprocating flitch table including means for holding a flitch, means for reciprocably moving the flitch table, a knife and pressure bar assembly mounted on a carriage, a linear hydraulic actuator for advancing the carriage toward, and retracting the carriage from, a plane in which the flitch table reciprocates, a programmable control means for causing the linear hydraulic actuator to advance and retract the carriage distances determined by the programmable control means, and means for coupling the programmable control means to the carriage.
Dependencies are inferred from the claim text.