Raytools BM111 Series User manual

BM111 SERIES
3KW Auto-Focusing Laser Cutting Heads User Manual
Hotline: [phone]
Email: [e-mail]
Add: 1500xinfei Road No.72, Shanghai, China

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Historical Version：
Historical
Version
Date of
Relase
Brief description of
alteration
Editor
Date of
Edit
Reviewer
Date of
Review
V1.0
2017/12/22
Establish BM111 User
Manual
Luyuan
2017/12/19
Alex Li
2017/12/22
Thank you for choosing our products!
This manual makes a detail introduction about the use of BM111 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：
2017/12/22

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Index
1Introduction ............................................................................................................................. 4
1.1 Product Features ...................................................................................................................4
1.2 Structure & Function .............................................................................................................4
2Product Configuration..............................................................................................................6
2.1 Configuration Type ................................................................................................................6
2.2 Packing List ............................................................................................................................6
2.3 Cutting Head Shape...............................................................................................................7
2.4 Cutting Head Configuration Diagram ....................................................................................7
2.4.1 Interface Type.......................................................................................................7
2.4.2 Focus length .........................................................................................................8
3Mechanical Installation............................................................................................................9
3.1 Mounting Holes .....................................................................................................................9
3.2 Connection of Water Pipe and Gas Pipe ...............................................................................9
3.2.1 Water-cooled interface.........................................................................................9
3.2.2 Assist gas interface .............................................................................................10
3.3 Connection of Cutting Head Cable ......................................................................................11
3.3.1 Connection of Cutting Head and Cable ..............................................................11
3.3.2 Connection of Cable and Driver .........................................................................12
3.4 Fiber Input Interface............................................................................................................12
3.5Fiber Insertion and Interface Direction Adjustment ...........................................................13
4ETC_F100 Installation.............................................................................................................14
4.1 Interface and Signal.............................................................................................................14
4.2 Wiring ................................................................................................................................17
4.3 ETC_F100 Dimensions .........................................................................................................18
5Adjustment of Beam Center and Focus Position ...................................................................19
5.1 Beam Center Position Adjustment (QBH interface) ............................................................19

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5.2 Beam Focus position Adjustment........................................................................................20
6Maintenance.......................................................................................................................... 21
6.1 Cleaning Lens.......................................................................................................................21
6.2 Removal and Installation of Lens.........................................................................................21
6.2.1 Removal and Installation of Protective Lens ......................................................22
6.2.2 Removal and Installation of Collimating Lens ....................................................22
6.2.3 Removal and Installation of Focusing Lens ........................................................23
6.3 Replace Nozzle Connection Assembly.................................................................................25
6.3.1 Replace Ceramic Structure .................................................................................25
6.3.2 Replace Nozzle....................................................................................................26
6.4 Fault Analysis of ETC_F100 ..................................................................................................26
6.4.1 Alarm Information ..............................................................................................26
6.4.2 Common Problems Analysis...............................................................................27

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1Introduction
This manual includes the general description, basic installation, factory settings, operation and
maintenance services and other aspects of BM111 series products, which have too many optical
and mechanical customization configurations, so only the main parts will be introduced in this
manual.
The BM111 series laser heads are auto-focusing cutting heads for fiber laser, which are
released by Switzerland RAYTOOLS AG in 2017. 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
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 10m / 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: Can collimate the incident laser into a parallel beam and adjust the beam
spot from the center of the nozzle;

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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.
Fig 1 - laser head structure
Collimating module
Focusing driver module
Protective Lens module
Nozzle module
QBH interface

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2Product Configuration
2.1 Configuration Type
Code
Fiber interface type
Collimating lens type
Focus lens type
BM111A01A
QBH
100YYH
125YYH
BM111A02A
QBH
100YYH
155YYH
2.2 Packing List
Name
Quantity
Laser cutting head
1
Driver
1
Controller
1
Power cable
1
Encoder cable
1
Control cable
1
Note:The above form is only for standard factory configuration.

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2.3 Cutting Head Shape
2.4 Cutting Head Configuration Diagram
2.4.1 Interface Type
Interface Type
QBH-100mm
Fig 2.1 –Cutting head shape of BM111
Cable interface
QBH interface
Water-cooled
interface
Cutting gas
interface
Protective Lens
X-Y adjust
Nozzle-cooled
gas interface

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2.4.2 Focus length
Focus Length
125mm FL
155mm FL
MODE
BM111001A
BM111002A
CL/mm
100
FL/mm
125
155
H/mm
393
417.8
Weight/KG
6.28
6.3
Spacer
parallel
H

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3Mechanical Installation
3.1 Mounting Holes
The mounting holes size and position of the BM111 laser cutting head are shown in Figure 3.1,
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.
3.2 Connection of Water Pipe and Gas Pipe
3.2.1 Water-cooled interface
BM111 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 500
watt, we recommend users to use water-cooled. As you can see from Figure 3.2, 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
Fig 3.1 - mounting holes position

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used equipped with external water supplied, the precondition is to meet the requirements in the
list.
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
3.2.2 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
Cutting gas pipe interface
Water-cooled interface
Water-cooled interface
Nobble-cooled gas
pipe interface
Fig 3.2 - position of water pipe and gas pipe interfaces

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filters which can remove a minimum of 0.01 micron 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.
About the nozzle cooling gas, Nitrogen or finely filtered air is recommended. The pressure
should be less than 10 bar. Do not use oxygen as a cooling gas.
Note: Gas interfaces can not 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.
3.3 Connection of Cutting Head Cable
3.3.1 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 3.3). After the proper length is reserved, the cable is
inserted into the track groove of the machine tool and fixed.
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
Cutting gas pipe diameter
（outside diameter ）
10mm
Cooling gas pipe diameter
（outside diameter ）
8mm

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3.3.2 Connection of Cable and Driver
Connect motor power cable and signal cable with the corresponding interfaces of driver
according to the definition in cable sleeve.(Note: The low level output of the limiting sensor is
normally closed output mode.)
Note: All wiring is in the state of power-off, and the power can be debugged after
inspection.
3.4 Fiber Input Interface
BM111 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. Figure 5 shows
the installation interface of QBH connector.
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.
Fig 3.3 - cable interface of laser cutting head
Signal cable interface
Motor cable interface

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3.5 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. ( see
Figure 3.4 )
When the fiber interface insert into the QBH connector, the red point on fiber is too far away
from the red point on laser head interface, causing an out of alignment insertion, users can refer to
these steps below to adjust the position of fiber interface on laser head for solving the problem. As
shown in Fig. 3.4, loosen the 4 locking screws of the part with a wrench, rotate the QBH interface ,
then tighten the locking screws after the red mark is in place.
Fig 3.4 - Schematic diagram of fiber interface insert in QBH connector
Locking screws

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4ETC_F100 Installation
4.1 Interface and Signal
1.Interface
Interface
Description
CON1
DB15 female connector, the interface to connect servo driver.
CON2
Interface to connect external IO devices.
CON3
Interface to 24V DC power supply.
CON4
Interface to connect external IO devices.
2.Signal
Pin signals of the CON1 Interface:
Pin
Description
1
OUT_Servo_DA（Drive speed command）
2
Servo_TGON（Drive brake signal）
3
Servo_CLR（Drive alarm clear signal）
4
Servo_OS（Drive zero speed clamp, used to control motor lock
shaft）
5
PGND（Power ground）
6
E1_A_N（Encoder A negative）
7
E1_B_N（Encoder B negative）
8
E1_C_N（Encoder C negative）
9
AGND（Analog ground）
10
Servo_ALM（Drive alarm signal）
11
Servo_SON（Drive enable signal）
12
VDD_24V（power supply）

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13
E1_A_P（Encoder A positive）
14
E1_B_P（Encoder B positive）
15
E1_C_P（Encoder C positive）
Pin signals of the CON2 Interface:
Pin
Description
N/A
/
N/A
/
Alarm output
When an abnormal alarm occurs, a high level signal is output,
normally high impedance state
Zero returning
Input signal calibration
Analog Ground
Analog signal common ground, analog signals include: focus set
input, focus feedback output
Focus set input
The input signal of setting the focus height, analog.
Focus feedback
output
Output the current focus height, analog.
Clasp brake +
Brake signal cable of the brake function motor, the negative pole is
connected to the negative pole of the power supply. ETC-F100
comes with internal relay, which can be connected with brake
cable directly
Note: "N / A" is an interface without definition, please leave it blank.
Pin signals of the CON4 Interface:
Pin
Description
Quick stop input
In emergency, press the emergency button to achieve emergency
stop, OUT_Servo_DA output 24V
N/A
/
Focusing in
Output 24V after the focus reaches the setting height.

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place
N/A
/
N/A
/
Focusing
enables
High-level control focus on, low-level control focus off
Lower limit
The lower limit of the input signal, active low
Upper limit
The upper limit of the input signal, active low
Note:
“N / A" is an interface without definition, please leave it blank.
The above table shows the ETC-F100 controller only for factory default settings.
To adapt the external circuit, there is a jumper cap inside the ETC_F100 to select the active-low
or active-high input signal. The output signal is selected active low or active high. To change the
signal level, contact us to change it.

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4.2 Wiring
Fig 4.1 - ETC_F100 Wiring Instructions

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4.3 ETC_F100 Dimensions
Fig 4.2 - ETC_F100 Dimensions (Unit: mm)

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5Adjustment of Beam Center and Focus Position
5.1 Beam Center Position Adjustment (QBH interface)
Cutting quality in a great extent depends on whether the beam spot is in the center of nozzle
or not. If the beam spot is not in the center, the laser beam may hit the nozzle or inner wall of the
laser head, that leads to produce high temperature deformation. Beam center position adjustment
should be considered when nozzle is replaced or the cutting quality is decreased.
Beam center position adjustment of the laser cutting head can be finished by adjusting
Collimating lens, X-Y direction. The adjusting screws are located on the top of the cutting head as
shown in Figure 5.1. By using inner hexagon spanner users can loosen or tighten the adjusting screw
until the beam spot is located in the center of nozzle. Make sure the laser beam output from the
center of nozzle. A method commonly used, tape dotting method:
Pick a scotch tape, flatten it, and stick it to the nozzle end face.
Open the inner guiding red light of the laser. Finding and observing the position that the
red light on the scotch tape relative to nozzle center;
open and adjust laser generator at the range of 80W-100W ,then laser dotting.
Tear off the tape and check the hole is in the center of the nozzle or not;
Repeat the above steps until the beam spot is in the center of the nozzle .
This center adjustment requires a series of steps, which is the basic operation of general
laser adjustment.
Fig 5.1 - QBH interface beam centering
X-Y adjust screws