Hypertherm HyIntensity Fiber Laser Rev.3 - Manual (Page 114)

setup and OperatiOn
3-6 Hypertherm Fiber Laser Instruction Manual – 807090 Revision 3
H
2
O valve
The laser power controller uses an electrically-actuated valve to control the water flow into the cabinet. This valve is
turned off if the system has been in the beam OFF state for 15 minutes or if a leak has been detected. This ensures that
there is no condensation on the water cooled components of the system. The valve is turned ON whenever the laser
beam is on. When the H
2
O valve is open the “Remote Chiller Run” contacts are closed. See the drawing below for an
example of the recommended circuit.
Remote chiller run
B6
B7
LPC2
LPC2
Closed when the H
2
O valve is open
Open when the H
2
O valve is closed
Flow meters
The system contains three flow meters to monitor coolant flow. If the input flow is outside its operating range, the system
goes to the fault state and disables the laser beam. If a cut is in progress and the system temperatures are within range,
the system is allowed to finish the cut before going to the fault state.
If the flow to the fiber-to-fiber coupler is outside its operating range, the system goes to the fault state and turns off the
laser beam.
If the process fiber flow is outside its operating range, the system enters the fault state.
Fiber-to-fiber coupling unit
If the fiber-to-fiber coupling unit detects excessive humidity, the system will enter the fault state and disable the laser
beam. The fiber-to-fiber coupling unit is part of the hardware in the Beam Delivery Optical circuit. If the input or output
fiber resistance is outside the specified operating range, the circuit will drop the laser power supply contacts and the
system will enter the fault state.