Static edge finder and tool height gauge for computer numerical control (cnc) machines

A method for finding an edge of a workpiece loaded in a CNC machine, the method comprising:

• providing a static edge finder comprising:
• a body having a distal end and a proximal end;
• an opening formed in the distal end of the body and extending toward the proximal end of the body, the opening terminating in a shoulder;
• a slot formed in the body and communicating with the opening;
• a plunger having a distal end and a proximal end, the proximal end of the plunger being disposed in the opening of the body and the distal end of the plunger extending out of the opening of the body;
• a spring disposed between the proximal end of the plunger and shoulder of the opening;
• and
• a retaining pin mounted to the plunger and extending through the slot;
• mounting the static edge finder to the spindle of the CNC machine;
• positioning the distal end of the plunger against the top face of the workpiece;
• lowering the spindle of the CNC machine so as to cause the proximal end of the plunger to move closer to the shoulder of the opening against the power of the spring;
• moving the spindle of the CNC machine laterally until the distal end of the plunger moves off the top face of the workpiece and sits in engagement with the edge to be found;
• and
• storing the position of the spindle, and then adding or subtracting half the diameter of the distal end of the plunger so as to find the edge of the workpiece.