Tweco PakMaster 50XL Plus (CE) - Manual (Page 28)

SECTION 4: OPERATION 22 Manual 0-2780
5. Place RUN/SET/LATCH switch to RUN mode.
a. Gas flow stops.
b. GAS indicator turns OFF.
6. Protect eyes and press or activate torch switch
a. Gas pre-flows starts.
b. GAS indicator turns ON.
7. After gas pre-flow (approximately 2 seconds)
a. Power supply enabled.
b. DC indicator turns ON.
c. Pilot relay closes.
8. Pilot arc is established
9. Move Torch within transfer distance of workpiece.
a. Main arc transfer.
b. Pilot arc OFF.
10. Optional - LATCH mode feature.
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.
11. Complete cutting operation.
NOTE
If the torch is lifted from the workpiece, while still
having torch switch activated, the main arc will
stop and the pilot arc will automatically restart.
12. Release or deactivate the torch switch.
a. Main arc stops.
b. Pilot arc stops (power supply enable signal re-
moved).
NOTE
If torch is activated during post-flow, pilot arc will
immediately restart.
If torch is within 3/8 in (9.5mm) transfer distance
of workpiece, main arc will transfer.
13. Gas will flow for 20 seconds (post-flow).
a. Gas solenoid closes.
b. Gas flow stops.
c. GAS indicator turns OFF.
14. Place the ON/OFF power switch on the front panel
of the unit to OFF.
a. AC Power indicator turns OFF.
b. Fan turns OFF.
15. Place the main power disconnect to open.
a. Main AC power is removed from the system.
4.05 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).
A-02470
Standoff Cutting Tip
40 amp (.036 in orifice)
Catalog No. 9-6500
Drag Cutting Tip, Air
(.031 in orifice)
Catalog No. 9-6501
Electrode, Air/N2
Catalog No. 9-6506
Gas Distributor
Catalog No. 9-6507
Standard Shield Cup
Catalog No. 9-6003
Crown Shield Cup
Catalog No. 9-6004
Gouging Tip
(0.046 in orifice)
Catalog No. 9-6502