BM111 SERIES 3KW Auto-Focusing Laser Cutting Heads User Manual
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.
QBH interface
Collimating module
Focusing driver module
Protective Lens module
Nozzle module
Fig 1 - laser head structure
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BM111 SERIES 3KW Auto-Focusing Laser Cutting Heads User Manual
2.3 Cutting Head Shape
Cable interface QBH interface
Water-cooled
X-Y adjust interface
Protective Lens
Cutting gas
interface
Nozzle-cooled
gas interface
Fig 2.1 – Cutting head shape of BM111
2.4 Cutting Head Configuration Diagram
2.4.1 Interface Type
QBH-100mm
Type
Interface
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BM111 SERIES 3KW Auto-Focusing Laser Cutting Heads User Manual
2.4.2 Focus length
125mm FL 155mm FL
Focus Length
Spacer
H
parallel
MODE BM111001A BM111002A
CL/mm 100
FL/mm 125 155
H/mm 393 417.8
Weight/KG 6.28 6.3
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BM111 SERIES 3KW Auto-Focusing Laser Cutting Heads User Manual
used equipped with external water supplied, the precondition is to meet the requirements in the
list.
Water-cooled interface
Water-cooled interface
Nobble-cooled gas
Cutting gas pipe interface pipe interface
Fig 3.2 - position of water pipe and gas pipe interfaces
Cooling water pipe
6mm
diameter(outside diameter)
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
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BM111 SERIES 3KW Auto-Focusing Laser Cutting Heads User Manual
4.2 Wiring
Fig 4.1 - ETC_F100 Wiring Instructions
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BM111 SERIES 3KW Auto-Focusing Laser Cutting Heads User Manual
4.3 ETC_F100 Dimensions
Fig 4.2 - ETC_F100 Dimensions (Unit: mm)
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BM111 SERIES 3KW Auto-Focusing Laser Cutting Heads User Manual
Protective lens module Laser head body
Nozzle module
M4 screws
Slag-Block plate
M4 screws
M4 screws
Fig 6.5 - Remove the protective lens and the nozzle component
As shown in figure 6.6, use a lens removing tool to remove the focus lens mount.
Focus lens base
Lens removing tool
Fig 6.6 - Remove and install the focusing lens
base
Remove the spring pressure ring and focusing lens with a lens removing tool.
Replace or clean the focusing lens.
As the direction shown in figure 6.7, put the focusing lens and the spring pressure ring in
the lens mount carefully and tighten the pressure ring properly.
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