Tweco 1000 Merlin(Dec2004) - Manual (Page 41)

Manual 0-2708 4-5 OPERATION
10. Complete cutting operation.
NOTE
If the torch is lifted from the workpiece, while still
having the torch activated, the main arc will stop
and the pilot arc will automatically restart.
11. 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 transfer distance of workpiece,
main arc will transfer.
12. Gas will flow for 20 seconds (post-flow).
a. Gas solenoid closes.
b. Gas flow stops.
c. GAS indicator turns OFF.
13. Place the ON/OFF power switch on the front
panel of the unit to OFF
a. AC Power indicator turns OFF.
b. Fans turn OFF.
14. 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 operated:
WARNING
Disconnect primary power at the source before
assembling or disassembling power supply, torch
parts, torch and leads assemblies or adding cool-
ant.
A. Coolant Level Inspection
Check the coolant level in the coolant reservoir at the
rear of the unit. If the coolant is down from the top
of the reservoir more than 2 inches (50 mm), add cool-
ant.
B. Deionizer Bag Inspection
Check the condition of the deionizer bag in the reser-
voir basket. If the bag is a yellowish brown (straw
color) then replace the bag.
C. Torch Parts Selection
Check the torch for proper assembly. Install proper
torch parts for the application (refer to Maximizer
300 Torch Instruction Manual, Catalog No. 0-2710).
D. Input Power
Check the power source for proper input voltage.
Make sure that Power Supply is set for the proper
voltage. Close main disconnect switch or plug unit
in to supply primary power to the system.
E. Work Cable Connection
Check for a solid and clean work cable connection to
the workpiece. The area must be free from paint and
rust.
F. Torch Connection
Check that the torch is properly connected.
G. Plasma Gas Supply
Connect desired plasma gas. Make sure gas sources
meet requirements (refer to appropriate Torch Instruc-
tion manual). Check connections and turn plasma
gas supply on.
H. Secondary Gas Supply
Connect desired secondary gas. Make sure gas
sources meet requirements (refer to Torch Instruction
Manual). Check connections and turn secondary sup-
plies on.