Tweco 39 CutMaster - Manual (Page 37)

cutmaster 39
Manual 0-4975 4T-1 OPERATION
SECTION 4 TORCH:
OPERATION
4T.01 Introduction
This section provides a description of the SL60
and SL100 Torch Assemblies followed by operat-
ing procedures.
4T.02 Functional Overview
The Torch is designed to operate with vari-
ous Power Supplies to provide a plasma cutting
system which can cut most metals. With gouging
torch parts the torch can be used for plasma arc
gouging.
NOTE
Refer to Appendix Pages for additional informa-
tion as related to the Power Supply used.
4T.03 Getting Started
Follow this procedure at the beginning of each
shift:
WARNING
Disconnect primary power at the source
before assembling or disassembling power
supply, torch parts, or torch and leads as-
semblies.
Torch Parts
Check the torch for proper assembly. Install proper
torch parts for the desired application (refer to next
SubSection called "Torch Parts Selection").
Input Power
Check the power source for proper input voltage.
Close main disconnect switch or plug unit in to
supply primary power to the system.
Work Cable
Check for a solid cable connection to the work-
piece.
Gas Supply
Select desired single gas supply. Make sure gas
sources meet requirements (see Note). Check con-
nections and turn gas supply on.
NOTE
Refer to Appendix Pages for additional informa-
tion as related to the Power Supply used.
Power On
Place the ON - OFF Switch on the Power Supply to
the ON position.
Function Control Knob
If the Function Control Knob is in SET position, gas
will flow. If the control knob is in the RUN position
there will be no gas flow.
Current Output Level
At the Power Supply, set the desired current output
level. For drag cutting set the control at 40 amps or
less only.
Pressure Settings
Place the Function Control Knob to the SET position.
Adjust the gas pressure control on the Power Sup-
ply for the proper gas pressure. Refer to Appendix
Pages for gas pressure and other specifics.
Ready for Operation
Return the Function Control Knob to RUN posi-
tion.
NOTES
For general cutting, use the RUN position which
provides normal torch operation where the torch
switch must be held throughout the main arc
transfer.
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.
Refer to Appendix 1 for a typical detailed block
diagram of Sequence of Operation.
The system is now ready for operation.
4T.04 Torch Parts Selection
Depending on the type of operation to be done
determines the torch parts to be used.
Type of operation:
Drag cutting, standoff cutting or gouging
Torch parts:
Shield Cup, Cutting Tip, Electrode and Starter
Cartridge