Automatic metal printer

An automatic metal printer, comprising:

• a platform reciprocating forward and rearward in a lower portion of a body by a motor-operated first ball screw, with a seat depression formed at a middle portion of an upper surface of said platform to seat thereon a hard material to be printed with an image by the printer;
• a saddle installed at a position above the platform so as to reciprocate to the left and right in said body by a motor-operated second ball screw;
• and
• a dotter vertically installed on said saddle so as to dot an upper surface of the hard material seated on the platform to print the image on the surface of the hard material, said dotter comprising:
• a diamond tip vertically installed at a lower portion of a front surface of said saddle while being biased by a spring so as to reciprocate upward and downward;
• a solenoid actuator vertically installed at the front surface of said saddle such that a plunger of the solenoid actuator comes into contact with an upper surface of said diamond tip and repeatedly pushes the upper surface of the diamond tip downward;
• and
• an automatic loading unit, said automatic loading unit comprising:
• two vertical cartridges standing upright at a rear portion of said body, and each sequentially receiving a plurality of metal materials therein;
• and
• a feeder installed at the rear portion of the body to surround lower ends of the two vertical cartridges, said feeder reciprocating to the left and right in the body by a motor-operated third ball screw so that the feeder alternately pushes metal materials stacked in the two cartridges to sequentially load the metal materials into the seat depression of the platform.