Tweco 82 PlazMaster - Manual (Page 21)

PLAZMASTER 82
Manual 0-5096 2T-3 INTRODUCTION
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 starter cartridge, around
the electrode, and out through the tip orifice.
The secondary gas flows down around the outside
of the torch starter 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.
D. 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 con-
nected to the workpiece via the work cable and to
the torch through a pilot wire.
E. 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.
A-02997
Torch Trigger
PIP Switch Shield Cup
To Control
Cable Wiring
Torch Switch
Parts - In - Place Circuit Diagram for Hand Torch
PIP Switch Shield Cup To ATC
CNC Start
PIP Switch Shield Cup
PIP Switch Shield Cup
Remote Pendant
Automation Torch
To ATC
To ATC
Art # A-08168
Parts - In - Place Circuit Diagram for Machine Torch