Pengontrolan Mesin Laser CNC untuk Paint Stripping

Abstract

Paint stripping has been performed on specimen Aluminium (Al) and Ferro (Fe) using a machine laser CNC (Computer Numerical Control). Laser Nd:YAG pulse is used as an energy source for the paint stripping, which Fundamental Harmonic (1064 nm) and Second Harmonic (532 nm). Paint stripping process begins with the manufacture of laser line pattern design according to size of the specimen with Notepad++ software, then the design is up and running with USB CNC software. CNC USB software will give instructions to motors to moving table machine CNC enter the line of design patterns that have been made. Specimens painted in red (620-750 nm) and green (495-570 nm). The optimization paint stripping using a machine laser CNC of laser beam, and laser energy to paint stripping through the set up of machine CNC and laser Nd:YAG pulse. The optimum energy 12 mJ (1064 nm) and 15 mJ (532 nm), the lens defocus point 8 cm. Cat on specimen can be striped off due to the interaction between beam laser and material, paint experienced evaporation causes the atoms - atoms in the material ended up bouncing off the paint chipped. After paint stripping, the surface of the specimen was observed using optical mikroskope 10x magnification, obtained specimen of red and green is better stripping on Nd:YAG fundamental harmonic (1064 nm) than Nd:YAG second harmonic (532 nm).