A WILKINSON STAR LIMITED PRODUCT 01-19 ISSUE 1
NOTES ON CUTTING
will start. Once the arc is completely through the
material start to move the torch along the required
cutting path at the correct speed.
Travelling too fast will cause blow back of material
and failure to cut through. Travelling too slow will
cause an excessive build up of material under the
cut and give poor performance.
Maintain the torch at 90
0
to the work piece to
ensure a straight cut edge.
Typical issues when cutting
The work piece is not cut fully. This may be caused
by:
The cutting current is too low.
The cutting speed is too high.
The electrode and nozzle of the torch are burned.
The work piece is too thick.
Molten slag drops from the bottom of work piece.
This may be caused by:
The cutting speed is too low.
The electrode and nozzle of the torch are burned.
The cutting current is too high.
Cutting speed guide - Quality cut
12 mm at 500 mm/min
19 mm at 250 mm/min
It is recommended not to ignite the arc in the air if not necessary, for it will shorten the
lifespan of the electrode and nozzle of the torch.
It is recommended to initiate the cutting from the edge of the work piece unless
penetration is needed.
Ensure spatter flies from the bottom of work piece while cutting. If spatter flies from
the top of the work piece, it indicates that the work piece is not fully cut because the
cutting torch is moved too fast or the cutting current is too low.
Keep the nozzle slightly touching the work piece or keep a short distance between the
nozzle and work piece. If the torch is pressed against the work piece, the nozzle may
stick to the work piece, and smooth cutting is difficult.
For cutting shaped work pieces or to meet precise cutting requirement a template may
aid accuracy.
It is recommended to pull the cutting torch while cutting.
Keep the nozzle of the cutting torch upright over the work piece and check if the arc is
moving with the cutting line.
Clean up the spatter on the nozzle regularly as this can affect the cooling of the nozzle.
Check the torch and consumable condition daily.
