B-2
OPERATION
B-2
WELDER CONTROLS:
FUNCTION/OPERATION
PORTABLE FIELD CONTROL CONNECTION
A “Portable Field Control” complete with 25’ leads is
shipped with each SAM welder.
A “Portable Field Control” is
not required for proper
operation of the SAM welder when connected to an
LN-8, LN-9, NA-3, NA-5, LT-7, or LT-56 wire feeder.
With other wire feeders and when stick electrode weld-
ing, the “Portable Field Control”
must be installed or
the SAM cannot produce its full open circuit voltage.
When installed the “Portable Field Control” is a fine
voltage adjustment when using the SAM as a constant
voltage power source. It is a fine current adjustment
when using the SAM as a variable voltage power
source.
The “Portable Field Control” can be mounted on the
SAM or wherever convenient for the welding operation.
When using an LN-4, LN-5, LN-6 or LN-7 wire feeder,
the control should normally be mounted on the wire
feeder. Specific mounting instructions are given below.
After mounting, connect the “Portable Field Control”
leads to #75 and #76 on the SAM terminal strip locat-
ed behind the lower cover panel directly below the con-
trol panel on the SAM400 or behind the right front
hinged door on the SAM650. Connect the green lead
of the “Portable Field Control” to the grounding stud
marked with the symbol located near the terminal
strips.
MOUNTING ON LN-4 (Discontinued)
1. Place the “Portable Field Control” on the vertical
front panel of the LN-4 on the wire reel side (next to
the rheostat panel) and mark the location of the
mounting slots.
2. Drill two holes in the panel and mount the control
using #10 sheet metal screws.
3. Route the leads with the LN-4 control cable back to
the power source.
MOUNTING ON LN-5 OR LN-6 (Discontinued)
1. Remove the knob from the upper rheostat on the
wire feeder control panel.
2. Be sure the appropriate wire feeder nameplate -
“Constant Voltage” or “ Variable Voltage “ - is in
place.
3. Remove the two screws on the top end of the wire
feeder nameplate.
4. Position the “Portable Field Control” mounting slots
over these holes and replace the screws.
5. Route the leads with the LN-5 or LN-6 control cable
back to the power source.
MOUNTING ON LN-7
1. Remove the top screws on the side of the LN-7 con-
trol box cover. (This is the left side when facing the
nameplate).
2. Position the “Portable Field Control” on the side of
the control box with the mounting slots over these
holes and replace the screws.
3. Route the leads with the LN-7 control cable back to
the power source.
OUTPUT STUDS
With the Engine OFF connect the work cable to the “To
Work” stud.
A. For Stick Electrode Welding
1. Connect the electrode cable to the “Stick” stud
and the work cable to the “To Work” stud.
Connect the “TAP” lead in the SAM650 to the
appropriate stud to adjust current and the arc
characteristics as described under “Current
and Voltage Controls.”
2. Install the “Portable Field Control”.
B. Automatic or Semiautomatic Welding
For all automatic welding processes, connect the
welding power cable from the wire feeder to the
“Connect to Auto. Equipment” stud. Connect the
“TAP” lead in the SAM650 to the appropriate stud to
adjust current and the arc characteristics as
described under “Current and Voltage Controls.”
1. LN-7, LN-8, LN-9, NA-3, NA-5, LT-7 and LT-
56 Wire Feeders.
a. Make the connections exactly as speci-
fied on the connection wiring diagram
included in the wire feeder Instruction
Manual.
b. Install the “Portable Field Control” when
using an LN-7.
SAM400 & 650
