Hypertherm HyIntensity Fiber Laser Rev.3 - Manual (Page 212)

Maintenance
4-20 HyIntensity Fiber Laser Instruction Manual – 807090 Revision 3
troubleshooting routines
Mild steel O
2
cutting
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?
Over burning or excessive cut-edge roughness
Is it only present
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?
Decrease oxygen pressure.
Inspect lens for dirt or damage.
Clean or replace.
No
Yes
Is the problem
corrected?
Is the
problem corrected?
Other possible causes:
• Poor material quality
• Poor material surface condition
• Excessive plate temperature
• Bent or damaged nozzle holder
No
Continue cutting and
record new parameters
Inspect nozzle for damage, dross
adhesion, beam centering, and orifice
condition. Clean or replace.
Is the problem
corrected?
Decrease assist gas pressure.
Adjust focal position.
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
Decrease nozzle diameter.
Is the problem
corrected?
Inspect lens for dirt or damage.
Clean or replace.
Is the problem
corrected?
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes