Hypertherm HyIntensity Fiber Laser Rev.3 - Manual (Page 215)

Maintenance
HyIntensity Fiber Laser Instruction Manual – 807090 Revision 3 4-23
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?
Plasma formation during stainless steel or aluminum cutting
Does plasma
occur only when
cutting in a certain
direction?
Correct the parameters for pressure,
assist-gas type, focal position, cut
speed, nozzle size, nozzle type, nozzle-to-
workpiece height, and laser power.
Inspect nozzle for damage, dross
adhesion, beam centering, and orifice
condition.
Clean or replace.
Yes
Is the problem corrected?
Inspect lens for dirt or damage.
Clean or replace.
Verify proper height tracking.
No
Yes
Is the problem corrected?
Is the problem corrected?
Follow the procedure for uniform plasma
reduction to try and eliminate the plasma.
No
Continue cutting and
record new parameters
Adjust focal position.
Decrease cutting speed.
Decrease assist gas pressure.
Is the problem corrected?
Is the problem corrected?
Other possible causes:
• Contamination of collimator or fiber
optics
Decrease nozzle to workpiece height
Increase cut speed
Yes
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Does the problem occur at the
start of a cut?
No
Yes
Is the problem corrected?
Is the problem corrected?
Is the problem corrected?
Yes
Add or increase creep time
at the start of the cut
to establish a kerf geometry.