Raytools BM110 Series User manual

BM110 SERIES (Chinese Model)
3.3KW Auto-Focusing Laser Cutting Head -User Manual
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Add: Friedeggstrasse 13, Postfach, 3400 Burgdorf, Switzerland

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Historical Version：
Historical
Version
Date of
Release
Brief description of
alteration
Editor
Date of
Edit
Reviewer
Date of
Review
V1.0
2021/09/08
Establish BM110 User
Manual
CB
2021/09/05
Thank you for choosing our products!
This manual makes a detail introduction about the use of BM110 series auto-focusing laser cutting
heads, including installation, operation and maintenance instructions etc. If you have other things
need to know, please contact us directly.
Please read the manual carefully before using the series cutting heads. This will help you use it
better.
Due to the continuous updating of product features, please note the product you have received may
differ in some aspects from the illustrations in this manual. We apologize for the inconvenience to
you.
Version：
V1.0
Date：
2020/11/16

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Index
1Introduction .............................................................................................................................3
1.1 Product Features ...................................................................................................................3
1.2 Structure & Function.............................................................................................................4
2Mechanical Installation............................................................................................................4
2.1 Mounting Holes.....................................................................................................................4
2.2 Connection of Water Pipe and Gas Pipe ...............................................................................5
2.2.1 Water-cooled interface.........................................................................................5
2.2.2 Assist gas interface ...............................................................................................6
2.3 Connection of Cutting Head Cable........................................................................................7
2.3.1 Connection of Cutting Head and Cable................................................................7
2.3.2 Connection of Cable and Driver ...........................................................................7
2.4 Fiber Input Interface..............................................................................................................8
2.5 Fiber Insertion and Interface Direction Adjustment .............................................................8
3Electrical Installation and Commissioning...............................................................................9
3.1 FSCUT (BC) with position mode.............................................................................................9
3.1.1 Wiring ...................................................................................................................9
3.1.2 Interface Operation ............................................................................................10
4Adjustment of Beam Center and Focus Position ...................................................................11
4.1 Beam Center Position Adjustment (QBH interface) ............................................................11
4.2 Beam Focus Position Adjustment........................................................................................12
5Maintenance..........................................................................................................................12
5.1 Cleaning Lens.......................................................................................................................12
5.2 Removal and Installation of Lens.........................................................................................13
5.2.1 Removal and Installation of Protective Lens ......................................................13
5.2.2 Removal and Installation of Top Protective Lens ...............................................14
5.2.3 Removal and Installation of Collimating Lens ....................................................15
5.2.4 Removal and Installation of Focusing Lens ........................................................15
5.3 Replace Nozzle Connection Assembly.................................................................................17
5.3.1 Replace Ceramic Structure.................................................................................17
5.3.2 Replace Nozzle....................................................................................................18
6Mechanical and Optical Configuration ..................................................................................18
6.1 Physical Structure................................................................................................................18
6.2 Optical Configuration ..........................................................................................................19
6.2.1 Collimation Length .............................................................................................19
6.2.2 Focus Length.......................................................................................................19

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1Introduction
This manual includes the general description, basic installation, factory settings, operation and
maintenance services and other aspects of BM110 series products, which have too many optical
and mechanical customization configurations, so only the main parts will be introduced in this
manual.
The BM110 series laser heads are auto-focusing cutting heads for fiber laser, which are released by
RAYTOOLS in 2020. The products are equipped with internal servo motor drive units, which use the
linear mechanism to drive the focusing lens to change position in the range of about 22mm
automatically. Users can use the program settings to achieve continuous adjustment of the focus
position to complete the rapid perforation of thick plates and automatic cutting of different
thickness, material plates. The products can be equipped with D30 composite lens groups to
integrate the beam. Diversified interface configurations can be adapted to a variety of fiber lasers,
optimized optical and water-cooled design allows the laser heads work under high power for a long
time continuously and steadily.
1.1 Product Features

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Optimized optical configuration and smooth and efficient airflow design.
Automatic focusing range + 10 ~ -12mm, adjustment accuracy 0.05mm.
Equipped with D30 composite lens groups, the maximum fiber power is up to 3KW.
Maximum acceleration of focus lens driver 10m / s2, maximum speed 6m / min.
The drawer-type of lens mount makes the replacement of protective lens more quickly and
easier.
The composite lens groups are used for beam collimating and focusing to obtain the best
optical quality and cutting effect.
Equipped with QBH, QD and other fiber interfaces can match with various fiber lasers.
1.2 Structure & Function
As shown in Figure 1, the laser head consists of four basic units, such as collimating module,
focusing driver module, protective lens module and nozzle module.
Collimating module: collimate the incident laser into a parallel beam and adjust the beam spot
from the center of the nozzle.
Focusing driver module: The collimating beam is focused into a small beam spot which has high
power density, and the focus position is adjusted by the driving device automatically.
Protective lens module: The protective lens protects the focusing lens from damage by the
returning slag and prolongs the service life of the focusing lens.
Nozzle module: Guide the focus beam to the work piece and produce high velocity jet cutting to
achieve high quality cutting.
2Mechanical Installation
2.1 Mounting Holes
The mounting holes size and position of the BM110 laser cutting head are shown in Figure 2.1,
which can be used to fix the laser head and machine tool. We strongly recommend customers to
install the laser head perpendicular to the process material surface as requested and make sure the
laser head is locked, this is one of the preconditions to ensure the follow-up stable cutting effect.
Note: The Z-axis motor slide plate for fixing the laser cutting head should be connected with
machine tools and make sure there is a good grounding.

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2.2 Connection of Water Pipe and Gas Pipe
2.2.1 Water-cooled interface
BM110 laser cutting head has 2 sets of water-cooled channels, the direction of water entry and exit
can be arranged arbitrarily. It is important to note that when the laser power is greater than 500W.
we recommend users to use water-cooled. As you can see from Figure 2.2, the position and
quantity of the water interfaces, and the table below details the recommended water flow rate.
The design of this water-cooled interface is closed loop water-cooled system, and it also can be
used equipped with external water supplied, the precondition is to meet the requirements in the
list.
Fig 2.1 - mounting holes position

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Cooling water pipe diameter
(outside diameter)
6mm
Minimum flow speed
1.8 l/min(0.48gpm)
Entry pressure
170-520kPa(30-60 psi)
Entry temperature
≥room temperature /＞dew point
Hardness (relative to CaCO3)
＜250mg/liter
PH range
6 to 8
Particles size available
Diameter less than 200 microns
2.2.2 Assist gas interface
The impurities in cutting gas such as hydrocarbons and water vapor can damage the lens and cause
laser power fluctuation as well as inconsistencies between the sections of the work piece. The
following table is the recommended cutting gas specifications. The higher the purity of the gas, the
better the quality of the cutting section.
Impurities can be filtered out in gas supply tube, but Oxygen and water vapor can permeate light
path through non-metallic materials, which is the source of the appearance of dust and
hydrocarbons. Stainless steel fittings are recommended, at the same time customers must use
filters which can remove a minimum of 0.01micron particle to purify.
We recommend customers to use the pressure gauges with stainless steel diaphragm. Industrial
pressure gauges suck in air. Rubber diaphragm produces hydrocarbons by aging or other factors.
Cutting gas
Purity
Maximum content of
water vapor
Maximum content of
hydrocarbon
oxygen
99.95%
<5 ppm
<1 ppm
nitrogen
99.99%
<5 ppm
<1 ppm
argon
99.998%
<5 ppm
<1 ppm
helium
99.998%
<5 ppm
<1 ppm
Tracheal tube diameter specification
Fig 2.2 - position of water pipe and gas pipe interfaces

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Note: Gas interfaces cannot be replaced arbitrarily, especially do not use PTFE TAPE.
Otherwise, the gas path will be blocked, the normal cutting will not be possible and the
laser head parts will be damaged at the same time.
2.3 Connection of Cutting Head Cable
2.3.1 Connection of Cutting Head and Cable
Connect the corresponding connector of cutting head with motor power cable, encoder cable,
sensor cable respectively (as shown in figure 2.3). After the proper length is reserved, the cable is
inserted into the track groove of the machine tool and fixed.
2.3.2 Connection of Cable and Driver
Connect motor power cable (8-pin) and encoder cable (12-pin) with the corresponding interfaces of
driver according to the definition in cable sleeve. (Note: limit sensor is NPN NC type. It outputs
NPN signal when the limit sensor is not triggered)
Note: All wiring is in the state of power-off and the power can be debugged after
inspection.
Cutting gas pipe diameter
（outside diameter ）
10mm
Fig 2.3 - cable interface of laser cutting head

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2.4 Fiber Input Interface
BM110 is suitable for most industrial fiber lasers. It is equipped with collimating lens assembly.
The connection between the end of the fiber and the cutting head is called fiber interface.
Commonly used fiber connectors include QBH, QD and so on, and every fiber interface has its
unique fixation method. Please refer to corresponding instruction of fiber interface.
Note: The optical devices must be kept clean and all dust must be removed before use. If
the optical fiber is vertically inserted in the laser head, the laser head must be rotated 90
degrees to the horizontal level and then inserted the optical fiber in it to prevent dust
from entering the interface and falling on the surface of the lens. Insert the optical fiber before
fixing the laser head.
2.5 Fiber Insertion and Interface Direction Adjustment
In this section, an optical fiber insertion method is described in conjunction with QBH connector.
First, align the red point at the end of the QBH connector with the red point of the handwheel; then
remove QBH dust proof cover, the red mark of fiber output end is aligned to QBH red mark, insert
the fiber interface straight to bottom; Then turn the QBH handwheel clockwise. It is in place when
you hear the "Da" sound, then pull the handwheel up and turn clockwise again.

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3Electrical Installation and Commissioning
3.1 FSCUT (BC) with position mode
3.1.1 Wiring
The motor is mixed stepper motor. The Vdc, GND and PE shall be connected to 24V, 0V and earth.
A+, A-, B+ and B- are for power interfaces of motor and shall be wired as below.
White
Red
Pink
Blue
+24V
0V
Up limit
Low limit
Note: The limit sensor is NPN-NC and it continuously outputs 0V signal when it is not triggered.
Open the platform configuration tool, enter the value shown below.
1. Set parameter as the figure (only for reference).
2. Select J axis for detection, open loop and initiate enable to travel and detect the
encoder in (-12mm~+10mm) to determine the encoder direction.
3. Save the parameters and enter the interface
Figure4.4 — Position loop FSCUT wiring diagram