ESAB Precision Plasmarc Installation, Operation And Maintenance Manual For Residential Installation page 46

SECTION 4
NOTICE
Stainless Steel
Material Thickness: .125" to .625" (3,2 mm to 15,9 mm) Material Thickness:
Material Thickness: Material Thickness:
Cut Qualities: Cut Qualities: Cut Qualities: Cut Qualities:
Plasma Gas: Plasma Gas: Air Plasma Gas: Plasma Gas:
Shield Gas: Shield Gas: Air/Methane
Shield Gas: Shield Gas:
Discussion: Discussion:
Discussion: Discussion:
Material Thickness: Material Thickness: .125" to .625" (3,2 mm to 15,9 mm) Material Thickness: Material Thickness:
Cut Qualities: Cut Qualities: Cut Qualities: Cut Qualities:
Plasma Gas: Nitrogen Plasma Gas: Plasma Gas: Plasma Gas:
Shield Gas: Shield Gas: Nitrogen Shield Gas: Shield Gas:
Discussion: Discussion:
Discussion: Discussion:
Material Thickness: Material Thickness: .187" to .625" (4,7 mm to 15,9 mm)
Material Thickness: Material Thickness:
Cut Qualities: Cut Qualities: Cut Qualities: Cut Qualities:
Plasma Gas: Nitrogen Plasma Gas:
Plasma Gas: Plasma Gas:
Shield Gas: Shield Gas: Nitrogen/Methane Shield Gas: Shield Gas:
Discussion: Discussion: Discussion: Discussion:
Refer to Cutting Process Data for recommended
flow/pressure settings.
Matted cut edge appearance
•
Light gray color
•
Much smoother finish
•
Possible slight increase in cut angle
•
Too much methane in the shield gas mixture can result in more dross
formation. 4:1 ratio air to methane is recommended. Because methane
is a fuel gas, possible slight increase in cut angles could be experienced.
Dark cut face similar to air
•
Excellent dross performance
•
Good cut angle
•
Shield and plasma gases combine, the volume/pressure of shield gas
can negatively affect cut squareness. Higher shield volume produces a
negative cut angle. A lower volume, produces a positive angle.
Shiny cut face
•
Lip formation at the bottom
•
Dross formation can be extensive and difficult to remove
•
Because methane is a fuel gas, flow/pressure rates can affect the cut
angle. High flow/pressure results in a negative cut angle, low
flow/pressure results in a positive cut angle. Nitrogen to methane ratio is
10 to 14 parts N / 1 part CH
2
severe, making Nitrogen/Methane shield gas combination unsuitable for
some finished part applications.
4-12
. The lip formed on the cut face bottom is
4
OPERATION