Roland LV-290, User Manual

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7.3 Focus Lens Options
7.3.1 CO2 Laser Focus Lens
Roland DG Cop. offers four different focal lenses namely the 1.5”, 2.0”, 2.5”, and 4.0” for different applications. The
number description, 1.5”, 2.0”, 2.5”, and 4.0” signifies the distance of where passed through beam will converge. For
example, when a laser beam passes through a 2.0” focus lens, the beam will converge at a 2.0” distance resulting in a
concentration of energy at that spot.
The resulting spot size from the different focus lens are also different and the following chart shows the different
spot sizes achieved from the different lenses.

1.5” Lens: The 1.5” lens is best when used for engraving of very fine details

2.0” & 2.5“ Lens: The 2.0” & 2.5“ lenses are good for normal engraving and cutting of up to 10mm thick
acrylic.
 4.0” Lens: The 4.0” lens is good for 10mm and above acrylic cutting.
Engraving effects achieved with the different lenses
Unscrew the three thumb screws on lens
carriage to remove the carriage panel. Take
out the lens carriage and insert the
optional one for different applications.
Thumbscrew