Table of Contents
Advertisement
E-8
MODE SELECTION
The LT-7 is shipped, ready to weld in a Constant Current
mode with the Variable Voltage nameplate visible. (See
Figure E.5). If the constant current process is desired,
be sure that multi process power sources are set in the
Constant Current mode per the instructions in the power
source operating manual.
NOTE: The term constant current (CC) was formerly
known as variable voltage (VV). The LT-7
Nameplate and PC Board still use the Variable
Voltage designation.
If a Constant Voltage power source is being used or the
Constant Voltage process is desired it will be necessary
to make the following changes.
1. Make certain that the Input power is turned
OFF.
2. Remove the four screws (3 phillips and 1 slotted)
that hold the nameplates to the front panel of the
Control Box.
3. Put the Constant Voltage nameplate on top of the
Variable Voltage nameplate and put both name-
plates back on the front panel with the three
Phillips screws.
NOTE: The CV nameplate on newer machines has a
black background with white lettering.
OPERATION
1 0
6
3
2
5
4
7
8
9
1
U s e v a r i a b l e v o l t a g e p o w e r s o u r c e
c o n s t a n t v o l t a g e p o w e r s o u r c e
C U R R E N T
S T A R T
V O L T A G E
S e e O p e r a r i n g M a n u a l f o r u s i n g a
1
1 1
1 1
L T - 7 T R A C T O R
I N C H
D O W N
D C
L I N C O L N W E L D
S O L I D S T A T E
U P
S T O P
8
9
C o d e N o .
7
S e r i a l N o .
T H E L I N C O L N E L E C T R I C C O . C L E V E L A N D , O H I O , M A D E I N U . S . A .
2
3
5
1 0
4
6
I N C H
P O W E R
C O N T R O L
O F F
O N
3
1 0
1 1
2
1
9
S T A R T
L T - 7 T R A C T O R
L I N C O L N W E L D
S O L I D S T A T E
S T O P
D C
5
6
7
8
9
1 0
1 1
4
5
6
V O L T A G E
8
7
C U R R E N T
3
S e r i a l N o .
T H E L I N C O L N E L E C T R I C C O . C L E V E L A N D , O H I O , M A D E I N U . S . A .
2
S e e O p e r a r i n g M a n u a l f o r u s i n g a
U s e c o n s t a n t v o l t a g e D . C . p o w e r s o u r c e
C o d e N o .
v a r i a b l e v o l t a g e p o w e r s o u r c e
1
S e r i a l N o .
C o d e N o .
4
O F F
D O W N
I N C H
U P
I N C H
C O N T R O L
O N
P O W E R
LT-7 TRACTOR
FIGURE E.5 - CC MODE
THE LINCOLN ELECTRIC CO. CLEVELAND, OHIO, MADE IN U.S.A.
Code No.
Serial No.
6
7
5
8
4
3
9
2
10
CURRENT
1
11
Use variable voltage power source
See Operaring Manual for using a
constant voltage power source
6
5
7
VOLTAGE
4
8
3
9
2
10
1
11
START
FIGURE E.6 - CV MODE
THE LINCOLN ELECTRIC CO. CLEVELAND, OHIO, MADE IN U.S.A.
Code No.
Code No.
Serial No.
Serial No.
6
5
7
4
8
3
9
2
10
VOLTAGE
11
1
Use constant voltage D.C. power source
See Operaring Manual for using a
variable voltage power source
6
5
7
CURRENT
8
4
3
9
2
10
1
11
START
E-8
ON
CONTROL
POWER
OFF
INCH
UP
INCH
DOWN
DC
LINCOLN WELD
SOLID STATE
LT-7 TRACTOR
STOP
ON
CONTROL
POWER
OFF
INCH
UP
INCH
DOWN
DC
LINCOLN WELD
SOLID STATE
LT-7 TRACTOR
STOP
Advertisement
Chapters
Table of Contents
