Preparations For Operation - ESAB Cutmaster 120 Manual De Instrucciones

ESAB CUTMASTER 120
10. Pressure Indicators
PSI BAR
MAX MAX
90 6.3
85 5.9
80 5.5
75 5.2
70 4.8
65 4.5
MIN MIN
The Indicators will illuminate according to the pres-
sure set by the Pressure Control Knob (number 4).

4.02 Preparations for Operation

At the start of each operating session:
WARNING
Disconnect primary power at the
source before assembling or disas-
sembling power supply, torch parts,
or torch and leads assemblies.
Torch Parts Selection
Check the torch for proper assembly and appropriate
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
ESAB model SL100 / Manual or SL100 / Mechani-
cal 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.
4-2
OPERATION
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 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 temperature condi-
tion 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.
Manual 0-5398
1 2
MIN A MAX
PSI BAR
MAX MAX
+
MIN MIN
!
Art# A-07946
STANDOFF
ESAB Cutmaster 120 Gas Pressure Settings
®
SL100
SL100 (Mechanized Torch)
Leads Length
(Hand Torch) SL100 SV
(Automation Torch)
Up to 50' 75 psi 75 psi
(7.6 m) 5.2 bar 5.2 bar
Each additional Add 5 psi 0.4
Add 5 psi 0.4 bar
25' (7.6 m) bar
3. For Drag cutting, adjust gas pressure from 75 -
95 psi / 5.2 - 6.5 bar (LED's in center of control
panel). Refer to the Drag Cutting chart for pres-
sure setting details.
DRAG (60 amps or less)
ESAB Cutmaster ® 120 Gas Pressure
Settings
SL100
Leads Length
(Hand Torch)
80 psi
Up to 25' (7.6 m)
5.5 bar
Each additional 25'
Add 5 psi 0.4 bar
(7.6 m)
Select Current Output Level
1. Place the Function Control Knob in one of the
three operating positions available:
RUN,
RAPID AUTO RESTART,
or LATCH.
Gas flow stops.
Manual 0-5398 OPERATION
ESAB CUTMASTER 120
2. Set the output current to desired amperage with
the Output Current Control Knob.
Cutting Operation
When the torch leaves the workpiece during cutting
operations with the Function Control Knob in the
RUN position, there is a brief delay in restarting
the pilot arc. With the knob in the RAPID AUTO
RESTART position, when the torch leaves the work-
piece the pilot arc restarts instantly, and the cutting
arc restarts instantly when the pilot arc contacts the
workpiece. (Use the 'Rapid Auto Restart' position
when cutting expanded metal or gratings, or in goug-
ing or trimming operations when an uninterrupted
restart is desired). And with the knob in the LATCH
position the main cutting arc will be maintained after
the torch switch is released.
Typical Cutting Speeds
Cutting speeds vary according to torch output am-
perage, the type of material being cut, and operator
skill. Refer to Section 4T.08 and following for greater
details.
Output current setting or cutting speeds may be
reduced to allow slower cutting when following a
line, or using a template or cutting guide while still
producing cuts of excellent quality.
Postflow
Release the trigger to stop the cutting arc. Gas con-
tinues to flow for approximately 20 seconds. During
post - flow, if the user moves the trigger release to
the rear and presses the trigger, the pilot arc starts.
The main arc transfers to the workpiece if the torch
tip is within transfer distance to the workpiece.
Shutdown
/ Turn the ON / OFF switch to OFF (down).
All Power Supply indicators shut OFF. Unplug
the input power cord or disconnect input power.
Power is removed from the system.
4-3