9
Plasma Cutter
Operating Instructions and Parts Manual
Plasma Cutter
Plasma 275
60Hz, single phase, 20 amp power
source.
1. Set up
- Check the plasma cutter to see if it
has been connected correctly and is
in good working condition as
described in Section 1 on Safety and
that it complies with safe operation
requirements.
- Switch on the power supply switch
of the cutter to observe if the
operation is normal. If it is normal, the
fan should start up and the Power
Supply Indicator Light should be on. If
there is no compressed air or the air
pressure is low the Low Pressure
Indicator Light will be on.
- Adjust the air supply valve until the
air pressure is up to the cutting torch
requirement. (Lowest pressure should
be no less than 50PSI), the Low
Pressure Indicator Light will not be lit
up in those conditions.
- Adjust the air flow to be sure it is
consistent.
- Pull the torch trigger. The cutting
operation begins after the cutting
plasma pilot arc is made.
2. Cutting Operation
2.1. Metal Sheet Cutting
- Put the torch’s nozzle at the start of
the work piece. Turn on the torch
switch to ignite the plasma pilot. After
the work piece is cut thorough, move
the torch along the cutting direction
uniformly. The cutting speed is
determined by watching to see if the
cutting goes all the way through. If
the speed is too fast, the work piece
won’t be cut thorough, or if too slow,
the cut quality would be affected,
excessive warping may occur, or the
arc could stop.
- When you’ve completed the cutting
process, turn off the torch; the plasma
pilot arc will stop.
2.2. Metal Mesh Cutting
-Fix the work piece and connect the
earth cable with the work piece.
-Put the cutting nozzle onto the work
piece, lift torch up slightly from the
work piece and turn on the switch
to cut.
2.3. Notice while cutting
- Unnecessary igniting of the pilot arc
in the air will reduce the life-span of
the torch’s electrode and nozzle.
- It is best to start cutting at the edge
of the work piece, unless you are
piercing the work piece.
- Keep a space between the nozzle
and the work piece. Pressing the
nozzle on the work piece could cause
the nozzle to stick, reducing the
smoothness of the cutting action
creating an undesirable result.
- Keep the torch’s nozzle vertical
against the work piece, and watch to
be sure the arc is moving along the
- Do not rapidly switch the torch
trigger on and off; this will damage
the pilot arc system and work piece.
