7 | 29
www.raytools.net
BM114S SERIES 6KW Laser Cutting Head User Manual
2.2.2
Assist gas interface
The impurity in assist 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 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.
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
