User guide

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User Guide
103
VLS3.60, VLS4.60 and VLS6.60 Accessories
HPDFO
High Power Density Focusing Optics (HPDFO) produces a smaller, focused laser beam “spot”
than a standard laser beam delivery optical system. Depending on the type of material being
processed, and the desired eect, the eective spot size produced by this option can be as
small as 1/4th the size of a standard 2.0 focusing lens.
With a smaller spot size (higher power density), and depending on your application material,
you can engrave smaller text, produce higher resolution graphics and photographs, vector
mark and cut thinner lines with the same laser power. It is possible to scribe and/or etch some
uncoated metals, such as stainless steel, directly without the assistance of chemicals or coatings.
The HPDFO consists of two parts: the Beam Expander, which is mounted in place of the Beam
Window, and the High Resolution Optics (HROS), which replaces the Focus Lens Kit. Through
specialized optics, the HROS expands the diameter of the laser beam and concentrates that
expanded energy at the focus point to produce a smaller focused spot that has a much higher power density.
Installation
Turn o the laser system.1.
Bring the X-Arm forward.2.
Remove the three thumbscrews that hold the lens kit in place and slide the lens kit out.3.
Replace the standard lens kit with the HPDFO lens kit.4.
Before running a le, select HPDFO from the lens size list on the UCP’s System Tab.5.
Lens Kits
A
B
C
D
E
There are four optional Focus Lens Kits available other than the standard
2.0: 1.5, 2.5, 4.0 and the High Power Density Focusing Optics (HPDFO)
kits. Included in these kits are the focus lens (A), #3 mirror (B), front plate
(C), thumbscrews (D) and a focus tool (E).
Dierent lenses produce dierent spot sizes and have dierent focal
ranges. For example, the 1.5 lens produces a spot size of 0.003” (0.076
mm) and has an eective focal range of +/- 0.075” (1.91 mm). This lens can
engrave very ne detail, but can only be used on very at materials.
On the opposite end, the 4.0 lens has a spot size of 0.013” (0.330 mm), but has an eective focal range of +/- 0.2”
(5.08 mm). Although this lens cannot engrave very ne detail, its focal range allows you to engrave on slightly rounded
or curved objects without the need for rotation.
Using a baseball as an example, focus the beam halfway between the
highest point and the lowest point of the engraving. Since a 4.0 lens has a
greater focal range than a shorter lens, you can engrave a considerable
distance around the ball without having to rotate it. Attempting to
engrave further around the ball will result in a loss of engraving power
and a distorted image.
Eective Engraving Area
High Point
Low Point
0.2” (5.08 mm)
0.2” (5.08 mm)
Focus Here