Yeswelder CT2050 Operator's Manual page 45

BASIC KNOWLEDGE OF WELDING
Basic Knowledge of CUT
General Description of CUT (Plasma Cutting)
1. Economic and practical, since it can cut metals by adopting compressed air as the plasma gas source.
2. The cutting speed has increased by 1.8 times when compared with oxyacetylene cutting.
3. It can cut thick steel plates conveniently and quickly.
4. And the post-flow function is available.
5. Metal workpiece such as stainless steel, copper, cast iron, and aluminum can all be cut.
6. With simple operation and high cutting speed, a smooth cutting surface can be obtained, and polishing is unnecessary.
7. It is easy to ignite an arc by adopting HF arc ignition or non-HF pilot arc ignition, especially non-HF pilot arc, which is safer and re-
liable.
Operation Method of CUT (Plasma Cutting)
1. Turn on the power switch of the machine, the power indicator illuminates and the preset CUT current will show on the screen.
2. Check the indicators normal and select proper working mode 2T or 4T.
3. Set cutting current according to the thickness of the workpiece.
4. Bring the copper nozzle of the cutting torch into contact with the workpiece (For models with pilot arc function, keep a distance of
about 2mm between the copper nozzle of the torch and the workpiece.), and then push the torch trigger. After the arc is ignited and
started, raise the cutting torch to the position about 1mm above the workpiece, and start cutting.
Notes for Cutting Operation
It is recommended not to ignite the arc in the air if not necessary, for it will shorten the electrode's lifespan and
the torch's nozzle.
It is recommended to initiate the cutting from the edge of workpiece, unless penetration is needed.
Ensure spatters fly from the bottom of workpiece while cutting. If spatters fly from the top of workpiece, it
indicates that the workpiece can not be fully cut because the cutting torch is moved too fast or the cutting
current is too low.
Keep the nozzle slightly touching the workpiece or keep a short distance between the nozzle and workpiece. If
the torch is pressed against the workpiece, the nozzle may stick to the workpiece, and smooth cutting is
unavailable.
For cutting round workpiece or to meet precise cutting requirement, molding board or other assistant tools are
needed.
It is recommended to pull the cutting torch while cutting.
Keep the nozzle of cutting torch upright over the workpiece, and check if the arc is moving with the cutting line.
If the space is not enough, don't bend the cable too much, step on or press upon the cable to avoid suffocating
of gas flow. The cutting torch may be burned because the gas flow is too small. Keep the cutting cable away
from edge tools.
Clean up the spatters on the nozzle timely, for it will affect the cooling effect of the nozzle. Clean up the dust
and spatters on the torch head after using everyday to ensure good cooling effect.
42