Tweco A80-A120 CutMaster - Manual (Page 30)

CUTMASTER A80, A120
OPERATION Manual 0-5119
4-2
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 (120 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 SL100 / 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 volt-
age. 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 work-
piece; 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
cooling 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
STANDOFF
Gas Pressure Settings
Leads
Length
SL100
(Hand Torch)
SL100
(Mechanized Torch)
SL100 SV
(Automation Torch)
Up to 50'
(7.6 m)
75 psi
5.2 bar
75 psi
5.2 bar
Each additional
25' (7.6 m)
Add 5 psi
0.4 bar
Add 5 psi
0.4 bar