V1.1
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BM114 SERIES 6KW Laser Cutting Head User Manual
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2.2.2
Assist gas interface
The impurity in auxiliary gas such as hydrocarbon and steam will damage the lens and cause cutting power
fluctuation as well as inconsistencies between the sections of the work piece. The firm below is the recommended
auxiliary gas specification. The higher the purity of the gas, the better the quality of the cutting section.
Impurity can be filtered out in gas supply tube, but Oxygen and water vapor can permeate light path through
nonmetal materials, which is the source of the appearance of dust and hydrocarbon. Stainless steel fittings are
recommended, at the same time must use filters which can remove a minimum of 0.01 micron particle to purify.
A pressure gauge with a stainless steel diaphragm is recommended. Industrial pressure gauges suck in air.
Rubber diaphragm produce hydrocarbon by aging or other factors.
CAUTION:
Gas interface 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.
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
Diameter of auxiliary gas
pipe (Outer diameter)
10mm
Diameter of cooled gas
pipe (Outer diameter)
8mm