We present a new 3D printing method using Over-extrusionthat is one of the printing errors. The over-extrusion means that 3D printers extrude too much materials and result in excess materials that ruin the outer dimensions of printed objects. In this paper, we control this over-extrusion positions and amount of overflowing materials by instructing a temporary stop during printing. Our method allows user to print patterns and characters on an external wall of object using the over-extrusion. In addition, users cannot check the print preview so that this over-extrusion occurs during printing. We conduct preliminary experiments for setting suitable parameters and implement a designing system that allows users to create a design of the object surface by drawing operations. We demonstrate example objects and discuss the expression using the over-extrusion.

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