Hypertherm HyIntensity Fiber Laser Rev.3 - Manual (Page 145)

setup and OperatiOn
HyIntensity Fiber Laser Instruction Manual – 807090 Revision 3 3-37
Focal position
The cutting head is designed to focus the laser at the nozzle exit when the nozzle extension is set to 18 mm. The actual
focus position can vary due to factors such as optic contamination and collimator adjustments.
Verify the focal position by making a series of test cuts using thin (~1 mm) stainless or aluminum with a nitrogen assist
gas. Start with the nozzle extension at 28 mm. Make test cuts approximately 50 mm (2 in) long with a 1 mm nozzle-to-
workpiece distance. Decrease the nozzle extension setting by 1 mm for each test cut until the nozzle extension setting is
14 mm. Examine the series of cuts to choose the thinnest kerf and it will determine the setting for the focal position on
the material surface. This position can be set as a relative zero using the laser head controller (see laser head controller
in the this section for more information).