Tweco 3000 Merlin - Manual (Page 39)

Manual 0-2532 4-7 OPERATION
ON/OFF switch to the ON position. The Enable
Signal must be turned ON either by a switch or
contact closure
E. Plasma Gas Supply
NOTE
Refer to the Gas Control Option Instruction
Manual 0-2477 for more information.
Connect the desired plasma gases to the gas mani-
fold at the rear panel of the Power Supply. Make
sure plasma gas sources meet requirements (refer
to Torch Instruction Manual). Check connections and
turn plasma gas supplies on.
Select the desired plasma gas at the Gas Control
Option front panel PLASMA gas switch.
F. Secondary Gas Supply
NOTE
Refer to the Gas Control Option Instruction
Manual 0-2477 for more information.
Connect the desired secondary gases to the gas con-
nections at the rear of the Power Supply. Make sure
gas sources meet requirements (refer to Torch In-
struction Manual). Check connections and turn sec-
ondary supplies on.
NOTE
For all secondary gases set the Power Sup-
ply front panel gas selector mode switch to
the gas cylinder symbol position.
Select the desired secondary gas at the Gas Control
Option front panel SECONDARY gas switch.
NOTE
To use tap water there must be a Water Regu-
lator (Catalog No. 8-6118) installed between
the water source and the Gas Control Option
When using water as the secondary it may take two
or three minutes for the water to start flowing out the
front of the torch.
NOTE
Refer to the Torch Instruction Manual for
proper secondary gas selection.
G. Plasma Gas Purge
Enable the system by doing one of the following:
• Turn the Enable switch to ON at the front panel
of the RC6010 Remote Control
• Signal supplied through the CNC control cable
• Signal supplied from a customer supplied switch
connected to the CNC terminal block (TB2) in-
side the Power Supply
Move the Power Supply ON/OFF switch to the ON
position. An automatic gas purge will remove any
condensation that may have accumulated in the torch
and leads while the system was shut down. The gas
purge duration is the same as the post-flow duration
(factory set to twenty seconds but adjustable to 5,
10, 20, or 40 seconds). After the purge is complete,
if the RUN/SET/PURGE switch is in SET position,
gases will flow. If the switch is in PURGE position
only plasma gas will flow. If the switch is in RUN
position there will be no gas flow.
NOTE
RUN/SET/PURGE may be selected at the
RC6010 Remote Control. Both switches must
be in the RUN position for normal operation.
H. Current Output Level
Select the desired current output level from 50 to
150 amps.
I. Additional Gas Purging
NOTE
Additional gas purging should be done when
switching to a new plasma gas. This will make
sure that the old gas in the lines has been
purged.
If additional purging of the plasma gas line is neces-
sary, move the RUN/SET/PURGE switch to PURGE
position. In PURGE mode, the GAS indicator will be
OFF because only plasma gas flows and the secon-
dary gas flow switch is not satisfied.
J. Ready for Operation
Return the RUN/SET/PURGE switch to RUN posi-
tion.
The system is now ready for operation.
NOTE
Refer to Appendix II for a detailed block dia-
gram of the Sequence Of Operation.