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4000 Series Laser Systems with
multi-axis motion
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| System Concept |
Laser |
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The
4000 Series Laser Systems are designed to perform demanding, precision
laser processing tasks in a production environment. They combine
accuracy and precision with stability and ruggedness for many
applications including micro-machining, precision welding, scribing,
drilling, resistor trimming, soldering, and ablation.
The
series is conceived as a set of standard building blocks, which are
combined to optimize performance for specific process and
environment.
The
major building blocks are the laser, beam delivery optics, motion
control, and frame structure.
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The
laser is selected from U.S. Laser's wide range of lamp pumped Nd:YAG
lasers, including CW, pulsed, Q-switched, and frequency
multiplied. Diode pumped systems are also available. The
table below lists the range of available lasers, with power levels and
typical applications.
In
many cases, a single laser can be configured to address more than one
application. For instance, the Q-switched lasers can also run CW.
Similarly, TEM00 lasers can also run in low order mode, and
frequency multiplied lasers can operate at the fundamental wavelength
(1064 nm).
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| Laser
Operating Mode |
Wavelength |
Power
or Energy Range |
Applications |
| CW, TEM00 |
1064 nm |
1-18
watts |
soldering,
welding |
| CW, low
order mode |
1064 nm |
10-150
watts |
soldering,
welding |
| CW,
multimode |
1064 nm |
10-2400
watts |
welding,
cutting, rapid manufacturing, heat treating |
| Pulsed,
low order mode |
1064 nm |
up to 50
joules/pulse |
welding,
drilling |
| Q-switched,
TEM00 |
1064 nm |
1-18
watts |
micro-machining,
scribing/dicing, ablation, resistor trimming |
| Q-switched,
low order mode |
1064 nm |
10-250
watts, up to 60 mj/pulse |
scribing/dicing,
ablation, marking |
| Q-switched,
frequency multiplied |
532, 355,
266 nm |
up to [6,
1.5, 0.25] watts |
micro-machining,
ablation, resistor trimming |
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Table 1- Laser
Application Guide
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Beam
Delivery Optics
The
conventional optical system in the 4000 series combines
diffraction limited beam delivery with high resolution coaxial and
parfocal CCTV viewing. The system design (incorporating
upcollimator, objective lens, and camera lens) allows for
independent selection of spot size, working distance, and image
magnification.
The
heart of the system is a series of high-aperture multi-element
apochromatic lenses designed exclusively by U.S.
Laser.
Fiber
optic and galvanometer beam delivery systems are also available.
Frame
Structure
For
rigidity and stability in industrial environments, the 4000 Series
is integrated in a welded steel box tubing frame, with tooling
plates supporting the laser rail and the workpiece area.
Cleanliness of the optical components is maintained by hinged
covers and an air filtration system.
C.D.R.H.
Class I systems include a workpiece area enclosure. The
enclosure includes a large sliding access door with laser-safe
viewport, internal illumination, and a baffled exhaust
port.
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Motion
Control
The
4000 Series is available with four types of X-Y motion control:
moving table, moving overhead optics, split axis and
galvanometer. Z-axis and rotary stages for 3, 4 and 5 axis
systems are also available.
For
highest accuracy and minimum spot size, the moving table
configuration is recommended. The standard XY table utilizes
a closed loop DC drive system, with accuracy to < 2µ.
When
it is undesirable to move the part, the moving overhead optics
configuration offers the accuracy and range of the moving table
system, with the beam delivery/viewing system above.
When
high speed motion and low cost are the most important
considerations, a moving mirror (galvanometer) system is
available.
All
configurations are driven by a PC based controller and Friendly
MotionTM , U.S. Laser's enhanced NC programming
system.
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Specifications:
Standard Configuration
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Laser
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Motion
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Type:
Nd:YAG,Lamp Pumped or Diode Pumped
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Type:
Available X-Y systems include
moving table,
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| Operating Mode: Application
dependent (See Table 1) |
moving overhead optics and split axis; |
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motorized and rotary stages for |
| Beam Delivery |
3, 4 and 5 axis systems available. |
| Conventional |
Control: Closed Loop DC |
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Type:
Coaxial, parfocal
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Range: Moving table to 24"
x 24" |
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Viewing:
High resolution CCTV
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Moving Overhead Optics to 12" x 12"
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Objective
Len: Apochromat
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Split Axis to 6 ft x 3 ft |
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Focus
Range (standard): 1" fine, 2" coarse manual
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Z-axis to 16" |
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Optional motorized |
Accuracy: < 2µ |
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Spot
Size/magnification: Selectable
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Maximum Speed: to 80 inches per
second |
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Interpolation:
linear, circular |
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Fiber
Optic
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Type:
Step Index or Gradient Index (GRIN)
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Utility
Requirements |
| Size:
600, 800 and 1000 micron |
Electrical:
203-230 V or 440-480 V, |
| Output
imaging: 1:1 standard, others available |
50-60 Hz, 3 phase |
| Viewing:
Optional CCTV system available |
Cooling
Water: See laser specification |
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| Galvanometer |
Physical |
| Flat
field sizes: 4", 6" and 12" square |
Size: Varies;
90" wide x 34" deep x 60" tall |
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Weight: Varies;
approximately 1500 lbs.
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