SPARCIN 9 / SPARCIN 9C
8
Copper/brass
Copper and brass can depending on alloy be cut with air, nitrogen or a mixture of 10%
hydrogen in nitrogen (NH10). When cutting with air, air electrode must be used. When cutting
with nitrogen or NH10 air electrode as well as gas electrode may be used.
Titanium
Titanium is best cut with a mix of 70% helium in argon. When using this mixture, gas
electrode must be used. Some titanium alloys are better cut with air or oxygen.
Piercing
Piercing is not recommended above 15 mm material thickness at >80A and 12 mm at <80A.
When firing the pilot arc the nozzle must be protected from molten metal spattering back by
keeping an adequate distance to the work piece. The piercing standoff distance must be at
least double the cutting distance.
The piercing capacity is highly material dependant.
How to improve cutting quality
To reach the best possible results the first step is to assure that the plasma cutting system is
properly installed an adjusted.
The cut quality is primarily determined from angle deviation, dross formation and the surface
of the kerf.
Angle deviation
The angle deviation is either positive or negative. A positive angle deviation (V-shaped)
occurs as a result of more material being removed in the upper part than the lower part of the
cut. A negative angle deviation occurs as a result of the reversed conditions.
Problems with angle deviation consists either of the cut having too much angle deviation or
inconsistent angle deviation, i.e. positive on one side, negative on the other.
Too much angle deviation
• Incorrect distance between nozzle and work piece. Adjust the distance.
Too much distance > positive angle deviation
To little distance > negative angle deviation
• Worn or damaged consumables. Check the parts and change if necessary.
• Wrong cutting direction. The left side of the cut seen from the cutting direction of the
torch has less angle deviation than the opposite side. Check the direction and change if
necessary.
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