Retrofit head -2, Requirements -2, Electrical -2 – Hypertherm LR2075 User Manual
Page 15: Purge gas -2, Cutting gas -2, Coolant requirements -2, Lr2075 head -2, Lr2075
SPECIFICATIONS
2-2
LR
2075 Laser Head Instruction Manual
LR2075
This manual provides the information needed to operate and maintain the LR2075 laser cutting head. The LR2075 is
designed to process material with a CO
2
laser cutting system. The LR2075 has 2 models. Both models have focal
lengths of 5" and 7.5" (127 mm and 190.5 mm). One model uses 1.5" (38 mm) diameter optics and the other uses 2.0"
(50.8 mm) diameter optics.
Requirements
Electrical:
Capacitive interface.........................................................................................+/- 15 VDC, 3 Watts
Digital readout sensor.....................................................................................1-10 VDC, 1500 ohm load
Purge gas: air or nitrogen
Gas quality ........................................................................................................Clean, dry and oil-free
Flow rate ............................................................................................................2 liters/minute
The customer must provide a regulated gas supply capable of delivering at a pressure of 1.4 bar (20 psig) to the laser
head.
Cutting gas: air, oxygen, nitrogen
Maximum system pressure ............................................................................27.5 bar (400 psi)*
Coolant requirements:
Coolant type......................................................................................................Water
Water purity.......................................................................................................200 k
Ω
– cm
Flow rate ............................................................................................................9 liters/hour (2.4 gallons/hour)
Pressure ............................................................................................................4.8 bar (70 psi) maximum
Note:
Use purified water as coolant in order to prevent corrosion in the coolant system. The hardness
of the water should be between 0.2 and 8.5 ppm. If using a conductivity meter to measure
water purity, the recommended level is between 0.5 and 5 µ Siemens/cm at 25° C (77° F).
*Maximum pressure is determined by the individual lens used. Check with the lens manufacturer for pressure rating.
Hypertherm 1.5" lenses are rated for 20 bar (290 psi). 2.0" lenses are rated for 20.7 bar (300 psi)