
B-70314EN/02 3.INSTALLATION
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3.7 LASER GAS
3.7.1 Gas Bottle
Use the gas bottle of the volume of 7m
3
. Store the necessary number
of bottles according to the operation of the laser.
3.7.2 Laser Gas Tubing
Laser gas inlet and outlet fittings on laser are female Rc 3/8".
(1) Gas inlet of oscillator
• Use the tube designated. (FANUC recommends the use of
AS1 tube or Poly-fro Tube manufactured by Jyunkosha or
Imperial Co. Ltd.)
Do not use a tubepossessing high permeability to He. (In the
worst case, the laser will be damaged by improper gas
composition.)
• Use the gas of the correct composition.
(2) Gas outlet of oscillator
The oil mist and the dissociated gas come out from the exit of the
gas. Tie the piping of 3/8 inches or more to the gas exit and put it
out to outdoor.
It will load the exhaust pump when thin piping or extremely long
and the exhaust ability decreases occasionally.
3.7.3 Gas Pipe
Observe the following cautions for piping between the laser gas
cylinder and laser oscillator.
• Use nylon tube having an inside diameter of 8 mm or larger
(Junlon AS1 manufactured by Junkousha, or equivalent) or
polyethylene (Polyfro-tube). Do not use a rubber or urethane
tube.
• Use a swage-lock vacuum joint.
Do not use a one-touch coupler, quick coupler, or ho-se-band
joint.
• Minimize the length of tubing. It should be kept within 5 m.
Never exceed 15 m. For a length of 15 m or longer, use stainless
pipe.
• If it is necessary to use metal pipe for lack of an alternative, use
stainless bright annealed pipe. Minimize the number of joints
used. Connect pipes, if necessary, using a swage-lock vacuum
joint or by IIG welding. Do not use silver soldering or copper
piping. Piping should be installed by a vacuum piping specialist.
Do not extend metal piping over 30 m
• Always keep the piping materials clean. Do not allow foreign
matter to get in the pipe.
• Use a pressure reducer that is free from gas leakage.