ESAB m3 G2 System Manual page 66

section 6
surface finish
process induced roughness
Cut face is consistently rough. May or may not be confined
to one axis.
• Incorrect Shield Gas mixture (See Process Data).
• Worn or damaged consumables.
machine induced roughness
Can be difficult to distinguish from Process Induced
Roughness. Often confined to only one axis. Roughness is
inconsistent.
• Dirty rails, wheels and/or drive rack/pinion.
(Refer to Maintenance Section in machine operation
manual).
• Carriage wheel adjustment.
Dross
Dross is a by-product of the cutting process. It is the undesirable
material that remains attached to the part. In most cases, dross
can be reduced or eliminated with proper torch and cutting pa-
rameter setup. Refer to Process Data.
high speed Dross
Material weld or rollover on bottom surface along kerf. Difficult to
remove. May require grinding or chipping. "S" shaped lag lines.
• Standoff high (arc voltage)
• Cutting speed fast
slow speed Dross
Forms as globules on bottom along kerf. Removes easily.
• Cutting speed slow
pt-36 plasma torch
Top View
Process
Induced
Roughness
66
Cut Face
Machine
Induced
Roughness
or
Cut Face
Lag Lines
Rollover
Side View
Cut Face
Lag Lines
Globules
Side View