Hypertherm HyIntensity Fiber Laser Rev.3 - Manual (Page 213)

Maintenance
HyIntensity Fiber Laser Instruction Manual – 807090 Revision 3 4-21
Set to the closest available process
parameters.
Have you cut this
material before?
Yes
Are the
parameters set to the
cut charts or a process
used in the past?
Dross on mild steel
Is the dross
hard and shiny?
Correct the parameters for pressure,
assist-gas type, focal position, cut
speed, nozzle size, nozzle type, nozzle-to-
workpiece height, and laser power.
Increase oxygen pressure.
Yes
Is the problem corrected?
Decrease cutting speed.
Adjust focal position.
No
Yes
Is the problem corrected?
Is the problem corrected?
Other possible causes:
• Poor material quality
• Incorrect oxygen purity
No
Continue cutting and
record new parameters
Inspect nozzle for damage, dross
adhesion, beam centering, and orifice
condition.
Clean or replace.
Is the dross brittle and
porous?
Decrease assist gas pressure.
Decrease nozzle diameter.
Is the problem corrected?
Is the problem corrected?
Other possible causes:
• Poor material quality
• Incorrect oxygen purity
• Excessive plate temperature
• Contamination of collimator or
fiber optics
Adjust focal position.
Inspect lens for dirt or damage.
Clean or replace.
Yes
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Inspect lens for dirt or damage.
Clean or replace.
Is the problem corrected?
No
Yes
Is the problem corrected?
Is the problem corrected?
Is the problem corrected?