
7.UNITS B-70315EN/02
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7.16 FAN UNIT
There are two major types of fan unit in the oscillator.
(1) Fan unit
Consists of several fans and a terminal block.
(2) Fan-assisted radiator
Consists of a water-cooled radiator, several fans, and a terminal
block.
7.16.1 Replacing a Fan Unit
(1) Turn off the power to the CNC, then turn off the main circuit
breaker and power supply for the laser oscillator.
(2) Disconnect the power supply cable and ground cable from the
terminal block.
(3) Remove the fan unit from the oscillator.
(4) Mount a new fan unit, then secure it by tightening the screws.
(5) Connect the power supply cable and ground cable.
(6) Close the main circuit breaker, turn on the power to the oscillator,
then turn on the power to the CNC. Then, check that the fans
rotate.
7.16.2 Attaching and Detaching a Cable to and from the Terminal
Block
(1) The cable is held by the fitting of the terminal block. By pressing
the fitting from the top with a sharp screwdriver, the securing
force is released, and the cable can be extracted.
(2) When inserting a cable, press the fitting from the top with a sharp
screwdriver. Ensure that the cable is not pulled out.
7.16.3 Replacing a Fan-assisted Radiator
(1) Turn off the power to the CNC, then turn off the main circuit
breaker and power supply for the laser oscillator. Turn off the
power to the chiller unit.
(2) Cooling water is passed through the radiator of the fan unit.
Drain the water from the radiator, then disconnect the water
pipes.
(3) Disconnect the power supply cable and ground cable from the
terminal block.
(4) Remove the fan unit from the oscillator. At this time, the radiator
may still contain water. Therefore, plug the radiator fittings with
rag to prevent water being spilled on the other units.
(5) Mount a new fan unit, then secure it by tightening the screws.
(6) Connect the water tubes.
(7) Connect the power supply cable and ground cable.