| dc.description.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). | en_US |
