Tweco PakMaster 75XL Plus (CE) - Manual (Page 33)

Manual 0-2782 4-5 OPERATION
4.04 Preparations for Operating
Follow this set-up procedure each time the system is op-
erated:
WARNING
Disconnect primary power at the source before dis-
assembling the power supply, torch, or torch leads.
A. Torch Parts Selection
Check the torch for proper assembly and appropriate front
end torch parts. The torch parts (shield cup, tip and elec-
trode) must correspond with the type of operation (cut-
ting or gouging). Refer to the Instruction Manual sup-
plied with the Torch Assembly for proper parts selection.
B. Check primary power source as follows:
1. Check the power source for proper input voltage.
Make sure the input power source meets the power
requirements for the unit per Section 2.03-A, Specifi-
cations/Design Features.
2. Connect the input power cable (or close the main dis-
connect switch) to supply power to the system.
C. Gas Selection
Select desired gas (air or nitrogen). Make sure gas source
meets pressure and flow requirements (refer to Section
3.08, Gas Connections). Check connection and turn gas
supply on.
D. Work Cable Connection
Check for a solid and clean work cable connection to the
workpiece. The area must be free from paint and rust.
Make a solid work cable
connection to the work-
piece or cutting table
A-00925
Figure 4-7 Work Cable Connection To Workpiece
E. Torch Connection
Check that the torch is properly connected.
F. Power Supply On
Move the ON/OFF switch to ON position.
G. Select Output Current
Select the desired current output level for the operation:
• 15 to 60 amps for standoff cutting and gouging
• 15 to 35 amps for drag cutting
NOTE
At output settings over 35 amps, the power sup-
ply automatically reduces output current to 35
amps if the torch tip touches the workpiece.
H. Set Operating Pressure
Move the RUN/SET/LATCH switch to SET position. Ad-
just the gas pressure to 60 - 75 psi (4.1 - 5.2 bar). Refer to
the Torch manual for specific pressure settings.
I. RUN/SET Switch
Set the RUN/SET/LATCH switch to RUN position.
The system is now ready for operation.
NOTE
For general cutting, use the RUN position which
provides normal touch operation where the torch
switch must be held throughout the main arc trans-
fer.
For specific applications, use the LATCH position
where the torch switch can be released after the main
arc transfer. The torch remains activated until the
main arc breaks from the workpiece.