Tweco 6000GST Merlin Plasma Cutting CE Slave Power Supply - Manual (Page 41)

Manual 0-2653 4-5 OPERATION
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 (see note). The Enable Signal must be turned
ON either by a switch or contact closure.
NOTE
In systems using more than one Power Supply both
front panel ON/OFF switches must be ON.
An automatic gas purge will remove any condensa-
tion that may have accumulated in the torch and leads
while the system was shut down. The gas purge du-
ration is 40 seconds. After the purge is complete, if
the Gas Control Module MODE switch is in one of
the SET positions, gases will flow. If the switch is in
RUN position there will be no gas flow.
NOTE
PLASMA SET, PILOT SET, SEC SET or RUN
are selected at the Gas Control Module
(GCM6000). The RUN switches on the Remote
Control (RC6010) and the Gas Control Module
(GCM6000) must be in the RUN position for nor-
mal operation.
H. Current Output Level
Single Power Supply System:
Select the desired current output level from 50 to
150 amps.
Dual Power Supply System:
Select the desired current output level from 100 to
300 amps.
I. Pressure and Flow Settings
Set the desired gas pressures and flows at the Gas
Control Module. Refer to the Instruction Manual,
0-2641, supplied with the Gas Control Module for
complete details.
NOTE
For recommended gas pressures and flows for vari-
ous cutting operations refer to the Instruction
Manual, 0-2642, supplied with the Maximizer 300
Torch.
J. Ready for Operation
Return the Gas Control Module MODE switch to
RUN position.
The system is now ready for operation.
NOTE
Refer to Appendix 2 for a detailed block diagram of
the Sequence Of Operation.
4.05 System Operational Details
NOTE
Frequently review the safety precautions at the front
of this manual.
This section contains operating information which is spe-
cific to the power supply. Detailed operating informa-
tion for torches can be found in the appropriate Torch
Instruction Manual.
WARNINGS
Disconnect primary power at the source before as-
sembling or disassembling power supply, torch
parts, or torch and leads assemblies, or adding cool-
ant.
It is not enough to simply move the ON/OFF
switch on the unit to OFF position when cutting
operations have been completed. Always open the
power supply disconnect switch five minutes after
the last cut is made.
A. Operational Suggestions
The suggestions below should be followed in all cutting
and gouging operations:
1. Wait five minutes before setting the ON/OFF switch
to OFF after operation. This allows the cooling fan to
run to dissipate operating heat from the power sup-
ply.
2. For maximum parts life, do not operate the pilot arc
any longer than necessary.
3. Use care in handling torch leads and protect them from
damage.
4. In continuous cutting applications using CO
2
as sec-
ondary , it is often necessary to manifold four to six
cylinders together to maintain adequate flow at oper-
ating pressures.