Laser Cutting Head - Wuhan Sintec Optronics Co Ltd

Laser Cutting Head
Laser cutting head is one of the most important components in laser cutting machines. Traditional
cutting head consists of only focus lens and cutting nozzle which does not have auto focus function. In
wide range laser cutting machines, different processing parts have slightly different height that causes
the material deviated from actual focal length. As a result variation of focused beam spot, power density
and cutting position will cause laser cutting quality inconsistent and difficult to meet the requirement.
Therefore a quality laser cutting head is very important as the height can be adjusted whenever
processing any material at different height using any cutting method. The distance between cutting
nozzle and workpiece is one of the factors affected cutting speed and quality. Beside selecting suitable
nozzle and air pressure parameter according to cutting situation, the distance between nozzle and
workipiece should also increase or decrease base on workpiece thickness.
To ensure high quality cutting the nozzle during cutting process must always be maintained stability at
the same height, especially on thin, textured surface, inconsistent flatness workpiece or even limited
cutting environment. It is impossible to adjust the height manually during cutting process as human
reaction is slow while cutting speed is very fast. To solve manually adjustment instability, a height
adjustment follower is necessary. With the follower installed no matter how thick the workpiece is, the
height will always be the same.
According to market requirement we developed self-floating auto focus laser cutting head. It uses the
capacitive sensing and automated servo system to ensure the cutting process always in focus to have a
consistent, clean and no glitch cutting result. With stepper motor, ball screw driver, advanced multifocusing system and high quality optical device, this enable the cutting head to keep the distance with
workpiece in stable and reliable condition in long term. It is an essential component for laser cutting
machine in order to obtain the optimum cutting quality.
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1. Mini Fiber Laser Cutting Head
Features:
 This series is a lightweight and high efficient laser cutting head. It has advantages over small area
and small, middle laser power cutting application especially on robot arm.
 Internal structure of cutting head is completely sealed to prevent the optical parts from dust
contamination;
 Using Cam lever structure to adjust 2 focus point at centre accurately;
 Using drawer style protecting lens installation method, easy for maintenance.
ST- MN-001E
ST- MN-001F
Specification:
Model
ST- MN-001E
ST- MN-001F
ST- MN-001B
ST- MN-001B
ST- MN-001C
ST- MN-001C
ST- MN-001D
ST- MN-001D
Collimation
focal Length
75,100mm
Focal Length
125,150mm
125,150mm
125,150mm
100,125,150mm
125,150mm
Vertical Adj.
Range
±4mm
±4mm
±4mm
±4mm
±4mm
Horizontal
Adj. Range
±1.5mm
±1.5mm
±1.5mm
±1.5mm
±1.5mm
Effective
Aperture
20mm
20mm
20mm
20mm
20mm
Max Air
Pressure
25Bar
25Bar
25Bar
25Bar
25Bar
Weight
2.1kg
2.0kg
2.1kg
2.1kg
2.0kg
Connector
QBH
QCS
QCSφ14
QBH
QCS
Laser Power
< 1000W
< 1000W
500W (Raycus)
< 1000W
< 1000W
75,100mm
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2. Fiber Laser Cutting Head
Features:
 This series of cutting head is suitable for large area and middle laser power range of cutting
application;
 Internal structure of welding head is completely sealed to prevent the optical parts from dust
contamination;
 Using Cam lever structure to adjust 2 focus point at centre accurately;
 Using drawer style protecting lens installation method, easy for maintenance.
ST-GQ- 001A
Specification:
Model
ST-RK- 001B
ST-GQ- 001A
ST-GQ-RK- 001C
ST-RK- 001B
ST-GQ- WT-001F
ST-GQ-RK- 001C
ST-GQ- WT-001F
Collimation
focal Length
75,100mm
Focal Length
125,150,200mm
125,150,200mm
125,150,200mm
125,150,200mm
Vertical Adj.
Range
±5mm
±5mm
±5mm
±5mm
Horizontal Adj.
Range
±1.5mm
±1.5mm
±1.5mm
±1.5mm
Effective
Aperture
25mm
25mm
25mm
25mm
Max Air
Pressure
25Bar
25Bar
25Bar
25Bar
Weight
3.5KG
3.5KG
3.0KG
3.7KG
Connector
QBH
QCSφ14 c/w
2x Beam Expander
QCS
QBH
500W Raycus Laser
>1000W Laer
>2000W Laser
Laser Power
>2KW Laser
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75,100mm
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3. CO2 Laser Cutting Head
Features:
 This cutting head is suitable for low CO2 laser power range
cutting application; it can be used to cut metal or non-metal
material. It is also economic and easy to operate;
 It use double drawer structure on focusing lens so the user
can easily configure it into long or short focal length;
 Centre focusing position can be adjusted by using simple tools.
Specification:
Model
ST-HQ-001A
Max Power
500W
Focal Length
63.5mm,101.6mm
Effective Aperture
24mm
Sliding range
40mm
Horizontal Adj Range
+-1mm
Weight
4.5kg
4. Fiber Laser Welding Head
Features:
 laser welding head had advantages for thin and tiny material welding
application;
 Internal structure of welding head is completely sealed to prevent the
optical parts from dust contamination;
 Air knife included to prevent optical parts damage by splatter;
 using drawer style protecting lens installation method, easy for
maintenance;
 CCD can be equipped according to customer requirement.
Specification:
Model
ST-GQ-HJ-001A
Max Power
2000W
Collimation Focal
Length
75mm,100mm
Focal Length
125mm,150mm,200mm,
Effective Aperture
24mm
Weight
2.7KG
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5. Capacitive Sensor
We provide custom made service and product to customer. Base on our
designing and manufacturing experience after so many years. The
capacitive sensor not only meets the basis requirements provided by the
customers. It is also fulfilled all relevant parameter while giving the
optimized performance to the customers. This greatly reduces the
customer cost.
6. Optical lens
Collimating lens and focusing lens module
Collimating lens module combining precise washer, spring washer and imported lenses is used to
convert transmission light from fiber to collimated beam. It is small in size and low loss.
Focusing lens module is a convex lens by combining meniscus lens and biconvex lens to get smaller
beam spot, correct the spherical aberration and had sharp cutting effect.
ST-GQ-JT-01, ST-GQ-JT-02
7. Ceramic Ring
Has great brittle and temperature adaptability as using imported ceramic ring material
STC-01
STC-02
8. Cutting Nozzle
Laser cutting Nozzle made of imported copper, has high temperature and high pressure resistance
characteristics. Use external threaded connection, easy to install and use.
SASC-D
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Model (Single)
SASC-D-08
SASC-D-10
SASC-D-15
SASC-D-20
SASC-D-25
SASC-D-30
SASC-D-35
SASC-D-40
ØD
0.8
1.0
1.5
2.0
2.5
3.0
3.5
4.0
D1
D2
H
H1
M12*0.75
25
16
4.5
SAMD-S
SAMD-D
Model (Complex)
SAMD-S-08
SAMD-S-10
SAMD-S-15
SAMD-S-20
SAMD-S-25
SAMD-S-30
ØD
0.8
1.0
1.5
2.0
2.5
3.0
Model (Single)
ØD
SAMD-D-08
0.8
SAMD-D-10
1.0
SAMD-D-15
1.5
SAMD-D-20
2.0
SAMD-D-25
2.5
SAMD-D-30
3.0
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D1
D2
H
H1
I
M12*1
25
20
6.5
24
D1
D2
H
H1
I
M12*1
25
20
6.5
24
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SDZ-S
Model (Double)
SDZ-S-08
SDZ-S-10
SDZ-S-15
SDZ-S-20
SDZ-S-25
SDZ-S-30
SDZ-S-35
SDZ-S-40
ØD
0.8
1.0
1.5
2.0
2.5
3.0
3.5
4.0
D1
D2
H
H2
M11*0.75
27.8
15
3.5
D1
D2
H
H2
M11*0.75
27.8
11
3.5
SDZ-D
Model (Single)
SDZ-D-08
SDZ-D-10
SDZ-D-15
SDZ-D-20
SDZ-D-25
SDZ-D-30
SDZ-D-35
SDZ-D-40
ØD
0.8
1.0
1.5
2.0
2.5
3.0
3.5
4.0
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SMZKH-D
SAMC-D
Model (Single)
SMZKH-D-08
SMZKH-D-10
SMZKH-D-15
SMZKH-D-20
SMZKH-D-25
SMZKH-D-30
Model
(Single)
SAMC-D-08
SAMC-D-10
SAMC-D-15
SAMC-D-20
SAMC-D-25
SAMC-D-30
ØD
0.8
1.0
1.5
2.0
2.5
3.0
D1
D2
H
H1
M14*0.75
25
11
4
ØD
D1
D2
H
H1
I
0.8
1.0
1.5
2.0
2.5
3.0
M10*1
15.8
13
6
14
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SAMB-D
SFLL-S
Model (Double)
SFLL-S-08
SFLL-S-10
SFLL-S-15
SFLL-S-20
SFLL-S-25
SFLL-S-30
SFLL-S-35
SFLL-S-40
Model
(Single)
SAMB-D-08
SAMB-D-10
SAMB-D-15
SAMB-D-20
SAMB-D-25
SAMB-D-30
ØD
0.8
1.0
1.5
2.0
2.5
3.0
3.5
4.0
D1
D2
H
H1
M11*0.75
28
11
3.5
ØD
D1
D2
H
H1
I
0.8
1.0
1.5
2.0
2.5
3.0
M12*1
16
18.5
7
12
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SMZKD-S
SMZKD-D
Model (Double)
SMZKD-S-08
SMZKD-S-10
SMZKD-S-15
SMZKD-S-20
SMZKD-S-25
SMZKD-S-30
ØD
0.8
1.0
1.5
2.0
2.5
3.0
Model (Single)
SMZKD-D-08
SMZKD-D-10
SMZKD-D-15
SMZKD-D-20
SMZKD-D-25
SMZKD-D-30
ØD
0.8
1.0
1.5
2.0
2.5
3.0
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D1
D2
D3
H
H1
H2
M10*1
11
14
17.5
6
4.7
D1
D2
D3
H
H1
H2
M10*1
11
14
17.5
6
4.7
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SGN-D
STC-D
Model (Single)
STC-D-10
STC-D-15
STC-D-20
STC-D-25
STC-D-30
Model (Single)
SGN-D-08
SGN-D-10
SGN-D-15
SGN-D-20
SGN-D-25
SGN-D-30
SGN-D-35
SGN-D-40
ØD
1.0
1.5
2.0
2.5
3.0
ØD
0.8
1.0
1.5
2.0
2.5
3.0
3.5
4.0
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D1
H
H1
25
61
5.5
D1
D2
H
H1
M11*0.75
28
15
3.5
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SLHB-S
SLHB-D
型号(双层)
SLHB-S-08
SLHB-S-10
SLHB-S-12
SLHB-S-15
SLHB-S-20
SLHB-S-25
ØD
0.8
1.0
1.2
1.5
2.0
2.5
型号(单层)
SLHB-D-08
SLHB-D-10
SLHB-D-12
SLHB-D-15
SLHB-D-20
SLHB-D-25
ØD
0.8
1.0
1.2
1.5
2.0
2.5
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D1
D2
H
H1
10
10.6
22
6
D1
D2
H
H1
10
10.6
22
6
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SBC-D
SBC-S
Model (Single)
SBC-D-08
SBC-D-10
SBC-D-15
SBC-D-20
SBC-D-25
SBC-D-30
ØD
0.8
1.0
1.5
2.0
2.5
3.0
Model (Double)
SBC-S-08
SBC-S-10
SBC-S-12
SBC-S-15
SBC-S-20
SBC-S-25
ØD
0.8
1.0
1.2
1.5
2.0
2.5
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D1
D2
H
H1
I
M10*0.5
14
17
5
13
D1
D2
H
H1
I
M10*0.5
14
17
5
13
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SLH-LZ
SLH-C
SMZK-D
Model (Single)
SMZK-D-08
SMZK-D-10
SMZK-D-15
SMZK-D-20
ØD
0.8
1.0
1.5
2.0
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D1
D2
H
H1
M5*0.5
6.9
12
2.5
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SPCT-D
SPCT-S
Model (Single)
SPCT-D-08
SPCT-D-10
SPCT-D-15
SPCT-D-20
SPCT-D-25
SPCT-D-30
SPCT-D-35
SPCT-D-40
ØD
0.8
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Model (Double)
SPCT-S-08
SPCT-S-10
SPCT-S-15
SPCT-S-20
SPCT-S-25
SPCT-S-30
SPCT-S-35
SPCT-S-40
ØD
0.8
1.0
1.5
2.0
2.5
3.0
3.5
4.0
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D1
D2
H
H1
M11*0.75
28
15
3.5
D1
D2
H
H1
M11*0.75
28
15
3.5
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STC5 Fiber Laser Cutting Head
STC5 series cutting head is a newly designed cutting device for fiber lasers. A fully closed-loop control
method with high performance capacitive sensor enables STC5 to be a cost effective solution, which
demonstrate an impressive auto-focusing features to enable the cutting machine to process any sheet
surface waviness. Besides common communication port, STC5 is equipped with Ethernet port in order
for real-time height detection, step piercing, leapfrog, pen-up height presetting, constant optical path
compensation, extraordinary fast response time, and dual closed servo loop of speed and position
feedback.

Features:
 Fully closed speed and position loop
 Ethernet communication port
 Step piercing
 Leapfrog jumping
 Pen-up height presetting
 Constant optical path compensation
 Extraordinary response time
 Auto-focusing for surface waviness
 Crash protection
 No signal attenuation over long distance
 Thumb drive upgrading firmware
Specifications:
Part number
STC5-xxx
(xxx: QCS or QBH related to fiber adaptor)
Cutting Head
Max power input
1000W
Lens EFL
100/125/150mm
Nozzle diameter
1 to 2mm
Nozzle type
Single outlet
Adjustable focus range
-4 to +4mm
Fiber adapter
QBH(IPG), QCS(Raycus), Other available upon request
Maximum assistant gas
2.5MPa
Cooling water
>1.5l/min, 6mm in diameter
Maximum diameter
50x50mm
Length
241mm @ FL100
Weight
1.6kg @ FL100
Capacitive Sensor & Focus Tracking Controller
Sampling rate
1000Hz
Static accuracy
1um
Dynamic accuracy
50um
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Height sensing range
Max travel speed
Max cable length
Communication port
Firmware upgrade
Capacitive sensor
Alarm
Calibration
Movement
Capacitance monitor
Required DC power input
Controllable motor
0-10mm
500mm/s(depends on the motor and ball screw pitch)
100m
Ethernet
Thumb drive
Self-accommodating to other cutting head and nozzle
Crash protection, edge detection
Control panel access
Leapfrog, step piercing, pen-up height presetting
Oscilloscope
24VDC
Servo motor such as Moon, Panasonic etc
Notes: Fiber core diameter of single mode IPG 500W laser is 50um, and the divergence angle from
QBH is 160mrad. The reduced divergence angle after QBH-A-060 is 0.4-0.6mrad with 16-20mm
diameter, which is less than the cutting head aperture 25mm.
Dimensions:
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STC2 Nd:YAG Laser Cutting Head
We supply the laser cutting heads with auto-focusing function and you can easily cut uneven
surface metals for Nd:YAG laser cutting applications.
Laser cutting head is one of most important parts of laser cutting machines. The traditional cutting head
only includes focusing lens and nozzle and does not have auto-focus function. If there is no auto-focus,
the spacing between the focus lens and workpiece will not be same, which results in different focused
beam diameters and then different power densities at different positions. Thus the cutting quality may
be different at the positions.
Based on the requirements from the market, we have developed self-floating laser cutting heads. By
using capacitive sensor and auto motor moving system, the spacing between the focus lens and
workpiece will be kept same at any position of the cutting field. The response time is millisecond range
only and the system is stable and reliable.
There are following main features of our cutting heads:
1) Suitable to 1064nm wavelength YAG laser cutting system.
2) Suitable to laser power less than 1000W.
3) Spacing between the exit of the nozzle and workpiece is 1-20mm adjustable, response time is less
than 5ms, and the control precision is 0.2mm.
4) Independent, complete Z-axis control and adjustable focus position. Also there are some functions
such as automatic/manual mode, up/down jog control, auto tracking/auto reset function, multiple gap
setting, zero shift compression etc
5) Numerical control port can easily be connected to most controllers. The cutting system automatically
tracks the marking head open, close or back to zero.
6) Multiple focusing lenses with various focal lengths.
7) Cooled nozzle design used for high pressure cutting.
8) Over travel protection, collision protection and power-off protection etc.
Structure Description
High power Nd:YAG self-floating laser cutting head consists of nozzle, focal lenses and auto-focusing
system.
 Nozzle: nozzle is very important for laser cutter. Through in-depth research and tests, we have
obtained a large of optimal data according to the different customers’ requirements to recommend
the best suitable nozzle.
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 Focal lens: in general, the focal lens system consists of a few lenses or non-spherical lenses. The
focal length is longer, the focused beam diameter is larger, the power density is lower, but the depth
of focus is longer, which is beneficial to cutting thick material.
 Auto-focusing system: there is a capacitive sensor used to measure the distance between the nozzle
and workpiece. The measured distance will be online fed backed and then the system will drive the
step motor or servo motor to adjust the distance and always keep the distance same.
Technical specifications:
Part number
STC2
Max. allowed laser power
1000W
Focal length of focal lens
80mm/120mm
Max. input beam diameter
40mm
Adjustable focus range
-4mm~4mm
Length of cutting head
146mm @ FL=80mm
Max. diameter of cutting head
88mm
Required DC power input
24VDC
Weight
0.5kg @ FL=80mm
We also can supply High-power CO2 Self-floating Laser Cutting Head similar to YAG Self-floating Laser
cutting Head after replacing all optics. However, CO2 laser cutting head only can be used to cut metals
due to using capacitive sensor.
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STD80 Fiber-coupled Nd:YAG Laser Welding Head
STD80 series laser welding heads are suitable for the fiber-coupled Nd:YAG laser beam via the
connector D80. The laser beam goes into the welding head via D80 and then the laser beam is focused
onto the workpiece to be welded. The co-axial assistant gas can be input via gas connector. The fiber
connector D80 and focusing lens inside the head will be water-cooled for high power laser.
Part number
Laser
Laser wavelength
Input connector type
Focal length of focal lens
Focusing adjustable range
Cooling
Assistant gas
Max. Allowed input laser power
Option
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STD80-H
Nd:YAG
1064nm
D80
100 or 120mm
15mm
Water cooling for both input
connector and focusing
Co-axial gas inlet & outlet
Average 500W & <30Hz
Co-axial CCD and monitor
Part number
STD80-V
Laser
Nd:YAG
Laser wavelength
1064nm
Input connector type
D80
Focal length of focal lens
100 or 120mm
Focusing adjustable range
15mm
Cooling
Water cooling for both input
connector and focusing
Assistant gas
Co-axial gas inlet & outlet
Max. Allowed input laser power
Average 500W & <30Hz
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Beam Delivery System
These type laser beam delivery devices designed to meet industrial environment constrain providing
safety and sealing against contamination for free space laser beam path. Static and adjustable laser
beam manipulation options are available. Optical mirror replacement can be accomplished without
affecting alignment.
All the beam delivery devices come with Z-axis adjustable, gas inlet and nozzle. Custom-made devices
are available upon request. For high power laser, water cooling is provided.



Sealed for industrial requirements
Stable and accurate
Easy mounting
Classification: LBD-1064-20-80W
LBD: laser beam delivery
1064: laser wavelength, 1064nm, 10.6um, 532nm, 355nm or
355nm
20:
clear aperture in mm.
80:
focal length of the focusing lens in mm
W:
W means water-cooling.
Examples:
LBD-10.6-20-80:
length 80mm
LBD-10.6-20-100:
LBD-10.6-15-60:
LBD-1064-20-75:
Air-cooled CO2 laser beam delivery, focal
maximum allowed input beam diameter 20mm
Air-cooled CO2 laser beam delivery, focal length 100mm
maximum allowed input beam diameter 20mm
Air-cooled CO2 laser beam delivery, focal length 60mm
maximum allowed input beam diameter 15mm
Air-cooled Nd:YAG laser beam delivery, focal length 75mm
maximum allowed input beam diameter 20mm
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21
CO2 Compact Manual Attenuator
We supply CO2 compact Manual Attenuators that allow you to vary laser output power.
Our Manual Attenuators allow the user to externally vary the power delivered from the laser. Many
lasers only vary their output power by pulsing full power on and off, and this does not always provide
the fine levels of control needed for some materials. This device will give infinitely variable control of the
transmitted beam from approximately 6% to 100%. Using ‘enhanced’ coated Brewster plates the
transmittance range can be changed from 0.04% to 98%.
When used with a laser of up to 100W the CO2 compact
Manual Attenuator can left be air-cooled. When used above
100W then the optional water-cooled jacket should also be
fitted.
Features:
 Vary power delivered from the laser
 Optional cooling jackets
 Provide fine levels of control
The attenuator is a cost-effective solution to low-power
beam delivery that is easy to understand, easy to use and
easy to order.
Table 1: Manual Attenuator specifications
Part Number
Height
Length
STC-MA
55mm
120mm
Clear Aperture
19mm
Table 2: specifications
Laser Power
Clear Aperture
Up to 500W
14.5mm to 22mm
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22
Laser Beam Splitter
Beam splitter, which splits input laser
beam into two or more beams
(called sub-beam), is widely used in
laser applications. Sub-beam can be
delivered in wanted direction with
optics, and all the sub-beams can be
assigned different power percentage
to cater versatile applications.
Typical beam splitter produced by
Sintec is a 2-channel splitter which divides the input beam into two equal power with same optical
properties. Multiple reflectors and transmissions are employed in the splitter system, and special optical
design delivers sub-beams with same property, which enable the same spot size and equal power
density at the focus of following convergent optics, so that same application performance can be
achieved in different channels.
High efficiency can be obtained where a beam splitter is involved to output multiple laser beams. It is
the most perfect solution for multiple beam processing production lines because of the beam splitter’s
high advantages: multiple channel, no power difference, sharing laser source and low cost.
The power difference measurement has been conducted in the 2-channel beam splitter of a fiber laser
marking system, which shows only 0.37% power difference between 2 channels.
Input Laser Power
8W
10 W
12 W
14 W
16 W
18 W
20 W
http://www.SintecOptronics.com
Sub-beam1
3.61 W
4.32 W
5.82 W
6.95 W
7.74 W
8.52 W
9.65 W
Sub-beam 2
3.65 W
4.29 W
5.77 W
6.89 W
7.68 W
8.50 W
9.59 W
sales@SintecOptronics.com
Difference
0.55%
0.35%
0.43%
0.43%
0.39%
0.12%
0.31%
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