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Nd:YAG Laser Workstation 80 W |
Topics:
Nd:YAG Laser
Flash Lamp Pumping
Pulsed and CW Mode
Q-Switch Mode 250 kW
CNC Material Processing
Laser Welding
Laser Cutting
Laser Soldering
Laser Drilling |
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Principle of operation
Material processing is a major domain in industrial laser
applications. The type of the material to be processed decides
the laser type to be used. The most commonly used lasers are the
Nd:YAG and the CO2. The Nd:YAG Laser emits a beam with a
wavelength of 1,064 µm and a power up to 2 kW, whereas the
wavelength of the CO2 Laser is 10,6 µm with an output power of
up to 25 kW. Since the interaction of light with matter depends
on the wavelength, it is clear that particular materials can be
processed more efficiently with Nd:YAG Laser and with the CO2
Laser. However the output power of the CO2 Laser can be much
higher than that of the Nd:YAG Laser. Choosing the right laser
for the demanded process, such as welding, cutting, drilling,
etc. and the kind of material to be processed is the subject of
this workshop. The Nd:YAG Laser will be used to train on
material processing itself and to evaluate optimum process
parameters for a given material like steel, aluminium alloy,
stainless steel, brass, ceramics and so on. Furthermore, the
influence of assisting gases like oxygen and inert gases on the
process will be studied. The Nd:YAG Laser resonator is equipped
with an active Q-switch device which allows the increase of the
output power to a 250 kW peak power per pulse. The repetition
rate can be varied from 0-1 kHz. This kind of operation is
useful for Laser drilling. Although the power is available only
for a duration of 60 ns, the material evaporates and the laser
penetrates the material like a pneumatic hammer. When using
oxygen as an assisting gas, which can be blown coaxial through
the laser nozzle, the application range can be expanded even
further . The laser as well as the workstation is controlled by
a computer. By means of an external CAD program the structure or
shape to be processed is generated as an HPGL file and passed to
the system where a parser converts it to movement commands for
the motorised X-Y stage. The working area is 100 x 100 mm and
for safety reasons completely covered in a such a way that the
entire laser system can be classified as a Class I Laser. |
Required Equipment
| Cat. No. |
Qty. |
Description |
Illustration |
07.0306 |
1 |
SMC800
Stepper motor control for laser workstations
This control unit contains the stepper motor controller
and computer interface to be used in connection with the
laser workstations. Beside an emergency stop, the front
panel is also provided with a master key controlled
input to manually operate the laser
|
 |
09.0182 |
1 |
Nd:YAG
Laser head 80W/250kW, power supply, electronics cabinet
The monolithic designed laser is a flash lamp pumped
Nd:YAG laser with the following specifications:
Output Power: 80 W continuous
Power Range: 0 - 80 W
Pulse Frequency: 0 - 1 kHz
Peak Effective Power: 250 kW at 1 kHz
Pulse Duration: 60 ns at 1 kHz
Beam Diameter: 3.0 mm
The complete electronics cabinet has a length of 600 mm,
a width of 800 mm and a height of 630 mm. The cabinet
contains the main control unit which controls the laser
head, and all safety interlock circuits. Another control
unit contains the stepper motor controller and computer
interface. The operating voltage is 3 x 400 volts AC at
16 Amps. The laser head is equipped with a primary
closed loop cooling system which is cooled by a
secondary loop by means of a heat exchanger requiring a
water flow rate of 5.5 l/min at a temperature range of
10 - 35° C. Water pressure should be 205 - 520 kPa and
the hardness < 250 mg/l. The primary cooling system must
be filled with distilled and deionised water which comes
along with the system.
|
 |
09.0184 |
1 |
Laser workstation incl. suction pump, XY
translation stages
The entire system is shielded in such a way that no
hazardous radiation can leave it. Therefore, the system
is specified as a Class 1 Laser. For loading the
workstation, the front door can be opened. A micro
switch passes the state of the door to the main safety
interlock controller. When the workstation is opened, it
is not possible to start the laser. To observe the laser
in action a black and white CCD camera is located inside
the workstation and a monitor outside.
|
 |
09.0188 |
1 |
Motor and
laser control software
The entire system is controlled by the external personal
computer. The software is able to monitor all safety
circuits of the system and to control the output power
of the Nd:YAG Laser as well as the mode of operation,
like Q-switch or continuous mode. Furthermore, the
repetition rate for Q-switch mode can be set as well via
the software. By means of an external CAD program, the
structure or shape to be processed is generated as HPGL
file and passed to the system where a parser converts it
to movement commands for the motorised X-Y stage.
|
 |
10.0180
|
1 |
EXP 18 manual |
No
illustration |
Required Options
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19.1000 |
1 |
IBM compatible PC, incl. VGA monitor and keyboard
For some experiments a PC is a must whereas others can
operate without one. However, some nice features may be
not accessible. Due to the steadily changing models and
operating systems a picture is not given. Please ask for
current models.
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No
illustration |
Options
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09.0189
|
1 |
Set of spare parts |
No
illustration |
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