3.INSTALLATION B-70315EN/02
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3.2 OSCILLATOR CONNECTIONS
The oscillator has connections for laser gas piping, cooling water
piping, and power and signal cables. For details of the electrical
connections for the CNC and machine, refer to the corresponding
connection manual.
3.2.1 Laser Gas
3.2.1.1 Laser gas specification
Supply the laser oscillator with a mixture of gases that satisfy the
conditions listed below.
(1) Composition ratio and accuracy
(For the composition ratio, check the label and specifications of
the oscillator.)
Gas A
for C1000-E, C2000-E, C4000-E, C6000-E
Gas B
for C5000-E
CO
2
5±0.25% 5±0.25%
He 40±2%
60±3%
(He balance)
N
2
55±2.75%
(N
2
balance)
35±1.75%
(2) Water (H
2
O) : 5 ppm or less
(3) Hydrocarbon (C
n
H
m
) : 1 ppm or less
(4) Gas purity : 99.99% or higher
3.2.1.2 Gas pipe
Observe the following cautions for piping between the laser gas
cylinder and laser oscillator.
(1) It is recommended that a polyfro (polyethylene) tube having an
inside diameter of 8 mm or larger (manufactured by Imperial
clevite) be used. Do not use a nylon, rubber, or urethane tube.
(2) Use swage-lock vacuum fittings. Do not use one-touch couplers,
quick couplers, or hose-band fittings.
(3) Minimize the length of tubing. It should be kept within 5 m.
Never exceed 15 m. For a length of 15 m or more, use stainless
bright annealed pipes. In this case, do not extend piping over 30
m.
(4) Minimize the number of fittings used. Connect pipes, if
necessary, using a swage-lock vacuum fittings or by TIG
welding.
A vacuum piping specialist should install piping.
(5) Always keep the piping materials clean. Do not allow foreign
matter to get in the pipe.
(6) Use a regulator that has been degreased and is free from gas
leakage.