Tweco 20mm Cutmaster - Manual (Page 30)

CUTMASTER 20mm
OPERATION 4-2 Manual 0-5078
4.02 Preparations for Operation
At the start of each operating session:
WARNING
Disconnect primary power at the source before
assembling or disassembling power supply, torch
parts, or torch and leads assemblies.
Torch Parts Selection
Check the torch for proper assembly and appropri-
ate torch parts. The torch parts must correspond
with the type of operation, and with the amperage
output of this Power Supply (60 amps maximum).
Refer to Section 4T.07 and following for torch parts
selection.
Torch Connection
Check that the torch is properly connected. Only
Thermal Dynamics model SL60 / Manual or SL100 /
Mechanical Torches may be connected to this Power
Supply. See Section 3T of this manual.
Check Primary Input Power Source
1. Check the power source for proper input
voltage. Make sure the input power source
meets the power requirements for the unit
per Section 2, Specifications.
2. Connect the input power cable (or close the
main disconnect switch) to supply power to
the system.
Air Source
Ensure source meets requirements (refer to Section
2). Check connections and turn air supply ON.
Connect Work Cable
Clamp the work cable to the workpiece or cutting
table. The area must be free from oil, paint and rust.
Connect only to the main part of the workpiece; do
not connect to the part to be cut off.
Art # A-04509
Power ON
Place the Power Supply ON / OFF switch to the
ON (up) position. AC indicator turns ON.
Gas indicator turns ON if there is sufficient gas
pressure for power supply operation and the cool-
ing fans turn ON.
NOTE
Minimum pressure for power supply operation is
lower than minimum for torch operation.
The cooling fans will turn ON as soon as the
unit is turned ON. After the unit is idle for ten
(10) minutes the fans will turn OFF. The fans
will come back ON as soon as the torch switch
(Start Signal) is activated or if the unit is turned
OFF, then turned ON again. If an over tempera-
ture condition occurs, the fans will continue to
run while the condition exists and for a ten (10)
minute period once the condition is cleared.
Set Operating Pressure
1. Place the Power Supply Function Control
knob to the SET position. Gas will
flow.
2. For Standoff cutting, adjust gas pressure
from 70 - 85 psi / 4.8 - 5.9 bar (LED's
in center of control panel). Refer to the
Standoff chart for pressure setting details.
A
+
PSI BAR
MAX MAX
MIN MIN
!
1 2
Art# A-07946
MIN MAX