High precision vision guided positioning device

A positioning device comprising:

• a head assembly;
• a work-space spaced below the head assembly for receiving at least one tray;
• an X moving means for moving the head assembly in the X direction;
• a Y moving means for moving the head assembly in the Y direction;
• a Z moving means for moving the head assembly in the Z direction;
• a scanning means for scanning the work-space;
• an elevator unit having a plurality of shelves arranged in a series one above another each shelf adapted to receive at least one tray, the shelves being movable in the Z direction;
• a tray moving means for moving a tray between the elevator unit and the work-space;
• and
• a control system operably connected to the head assembly, X moving means, Y moving means, Z moving means, scanning means, elevator unit and tray moving means for controlling the movement of the head assembly in the X, Y and Z direction, for controlling the movement of the shelves in the Z direction and for controlling the tray moving means.