
B–70115EN/03
10. REPLACEMENT PROCEDURES
295
When the turbo blower is replaced, the gas circulating system is open to
the atmosphere for a long time. Pay particular attention to the immediate
surroundings to ensure that dust and other contaminants do not enter the
gas circulating system.
Clean the flanges of the turbo blower and the pipe flanges before replacing
the turbo blower.
CAUTION
Do not incline the turbo blower while transporting and
installing it. Doing so will cause lubricating oil to enter the
pump, contaminating the laser gas circulating system and
optical mirrors. Usually, all oil is drained from a turbo blower
prior to shipping. Even so, however, the turbo blower must
not be inclined because trace amounts of oil will inevitably
remain inside the unit.
If a turbo blower is inclined, it can no longer be used.
(1)Replacement procedure
Be careful not to damage the O–rings or their mating surfaces
on the pipes. A damaged O–ring or mating surface will result
in gas leakage.
1) Turn off the power to the CNC, then turn off the power to the laser
oscillator. In addition, open the main circuit breaker for the laser
oscillator.
2) Disconnect the cooling water tubes and power cables from the
turbo blower, then drain the oil from the turbo blower.
3) Disconnect the two pipes from the turbo blower outlet and one pipe
from turbo blower inlet. Cover the removed gas pipes and turbo
blower to prevent dust from entering.
4) Remove the hexagon headed bolt which secures the damping
rubber and blower base, then remove the turbo blower by sliding
it horizontally. Note that the turbo blower weighs about 30 kg.
5) Remove the two metal brackets, used to secure the turbo blower,
from the removed turbo blower, then mount them on the new turbo
blower.
6) Mount the new turbo blower on the oscillator, then fix the gas
pipes. Be careful not to damage the O–rings and ensure that no
O–ring is missing.
10.4
REPLACING THE
TURBO BLOWER