Computer-controlled band saw sharpener

An electro-mechanical driver for providing a reciprocating drive force, comprising:

• a. driver frame;
• b. a servo motor mounted on said frame, said motor having a rotary output shaft;
• c. a ball screw, said ball screw having one end attached to said rotary shaft and the other end mounted for rotation on said driver frame, said ball screw further having a threaded portion between said one end and said other end;
• d. a ball nut mounted on said threaded portion, said ball nut having internal threads and further including a plurality of balls captive between said internal threads and said threaded portion;
• e. a carrier box, said ball nut being secured within and fixed to said carrier box;
• f. a drive arm connected to said carrier box;
• g. computer means interconnected to said motor, for selectively actuating said motor for rotation first in one rotational direction and then in another rotational direction, thereby moving said carrier box in reciprocating fashion;
• and,
• h. a position encoder connected to said motor rotary output shaft, said position encoder providing an output to said computer means corresponding to an extent, rate, and a direction of rotation for said servo motor.

An electro-mechanical driver for providing a reciprocating drive force, comprising:

• a. driver frame;
• b. a servo motor mounted on said frame, said servo motor having a rotary output shaft;
• c. a ball screw, said ball screw having one end attached to said rotary shaft and the other end mounted for rotation on said driver frame, said ball screw further having a threaded portion between said one end and said other end;
• d. a ball nut mounted on said threaded portion, said ball nut having internal threads and further including a plurality of balls captive between said internal threads and said threaded portion;
• e. a carrier box, said ball nut being secured within and fixed to said carrier box;
• f. a drive arm connected to said carrier box;
• g. a position encoder connected to said motor rotary output shaft, said position encoder providing an output corresponding to rotation of said servo motor;
• and,
• h. computer means interconnected to said motor and to said output of said position encoder, for selectively actuating said motor for rotation in a first rotational direction and then in a second rotational direction, thereby moving said carrier box in reciprocating fashion.

An electro-mechanical driver for providing a reciprocating drive force, comprising:

• a. driver frame;
• b. a motor mounted on said frame, said motor having a rotary output shaft;
• c. a ball screw, said ball screw having one end attached to said rotary shaft and the other end mounted for rotation on said driver frame, said ball screw further having a threaded portion between said one end and said other end;
• d. a ball nut mounted on said threaded portion, said ball nut having internal threads and further including a plurality of balls captive between said internal threads and said threaded portion;
• e. a carrier box, said ball nut being secured within and fixed to said carrier box;
• f. a first bellows extending from one end wall of said carrier box covering a first enclosed section of said threaded portion of said ball screw, and a second bellows extending between the other end wall of said carrier box covering a second enclosed section of said threaded portion of said ball screw;
• g. a drive arm connected to said carrier box;
• and,
• h. computer means interconnected to said motor, for selectively actuating said motor for rotation first in one rotational direction and then in another rotational direction, thereby moving said carrier box in reciprocating fashion.

An electro-mechanical driver for providing a reciprocating drive force, comprising:

• a. driver frame;
• b. a motor mounted on said frame, said motor having a rotary output shaft;
• c. a ball screw, said ball screw having one end attached to said rotary shaft and the other end mounted for rotation on said driver frame, said ball screw further having a threaded portion between said one end and said other end;
• d. a ball nut mounted on said threaded portion, said ball nut having internal threads and further including a plurality of balls captive between said internal threads and said threaded portion;
• e. a carrier box, said ball nut being secured within and fixed to said carrier box;
• f. a drive arm connected to said carrier box;
• g. computer means interconnected to said motor, for selectively actuating said motor for rotation first in one rotational direction and then in another rotational direction, thereby moving said carrier box in reciprocating fashion;
• and,
• h. a micro switch mounted on said driver frame, said micro switch providing an output to said computer means when said carrier box reaches a homing position.