ESAB CUTMASTER 50+ Operating Manual page 27

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Power
Supply
+
C
Typical Torch Head Detail
By forcing the plasma gas and electric arc
through a small orifice, the torch delivers a
high concentration of heat to a small area.
The stiff, constricted plasma arc is shown in
Zone C. Direct current (DC) straight polar-
ity is used for plasma cutting, as shown in
the illustration.
Zone A channels a secondary gas that
cools the torch. This gas also assists the
high velocity plasma gas in blowing the
molten metal out of the cut allowing for a
fast, slag - free cut.
B. Gas Distribution
The single gas used is internally split into
plasma and secondary gases.
The plasma gas flows into the torch
through the negative lead, through the
start cartridge, around the electrode, and
out through the tip orifice.
The secondary gas flows down around the
outside of the torch start cartridge, and out
between the tip and shield cup around the
plasma arc.
C. Pilot Arc
When the torch is started a pilot arc is
established between the electrode and
cutting tip. This pilot arc creates a path for
the main arc to transfer to the work.
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D.
E.
A
B
Workpiece
A-08331
To Control
Cable Wiring
A-02997
INTRODUCTION
CUTMASTER 50+, CUTMASTER 70+
Main Cutting Arc
DC power is also used for the main cutting
arc. The negative output is connected to
the torch electrode through the torch lead.
The positive output is connected to the
workpiece via the work cable and to the
torch through a pilot wire.
Parts - In - Place (PIP)
The torch includes a 'Parts - In - Place' (PIP)
circuit. When the shield cup is properly
installed, it closes a switch. The torch will
not operate if this switch is open.
Automation Torch
PIP Switch
To ATC
Parts - In - Place Circuit Diagram for Machine Torch
Torch Switch
PIP Switch
Parts - In - Place Circuit Diagram for Hand Torch
Shield Cup
Torch Trigger
Shield Cup
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