8
Systematics, Inc. West Chester, PA. 19380
PROCESS SELECTION
The following controls are lo-
cated on the front of the PBE250.
F. (-)NEGATIVE TERMINAL
Negative output terminal. The
work cable is plugged into this
terminal during standard weld-
ing operation. The torch selec-
tor cable can be plugged into
this terminal for straight po-
larity welding on very light
sheet metal, or for using flux
cored gasless wire.
G. MODE SWITCH (PBE250S ONLY)
Controls mode of operation of
welding machine. "CONT." posi-
tion is for normal, continuous
welding operation. "SPOT" posi-
tion puts the spot timer in the
circuit for automatic MIG Con-
sumable Spot Welding. "STITCH"
position is used for stitch
welding on very light materials.
H. SPOT/STITCH TIME (PBE250S ONLY)
After the torch trigger is actu-
ated, the timer allows the wire
to feed and the gas and power to
flow for the time selected. The
Mode Switch must be set in "SPOT
or STITCH" position for timing
operation.
I. TORCH PANEL MOUNT
Combination power output, con-
tactor switch connection, gas
supply connection, and wire feed
output in a single unit.
J. TORCH SELECTOR CABLE
Plugs into (+) positive terminal
for standard welding operation
or (-) negative terminal for
straight polarity welding on
very light sheet metal, or for
using flux cored gasless wire.
K. (+)POSITIVE TERMINAL
Positive output terminal from
the welder DC power source. The
torch selector cable is plugged
into this terminal for standard
welding operation. The work
cable can be plugged into this
terminal for straight polarity
welding on very light sheet
metal, or for using flux cored
gasless wire.
A.
WIRE
SPEED
B.
MIG/TIG
VOLTAGE
SWITCH
C.
VOLT-
METER
D.
CIRCUIT
BREAKER
E.
"ON"
INDICATOR
LIGHT
F.
(-)NEGATIVE
TERMINAL
G.
MODE
SWITCH
(PBE250S
ONLY)
H.
SPOT/
STITCH
TIME
(PBE250S
ONLY)
I.
TORCH
PANEL
MOUNT
J.
TORCH
SELECTOR
CABLE
K.
(+)POSITIVE
TERMINAL
A. WIRE SPEED
Potentiometer controls speed of
wire drive motor to give wire
speed of 50 to 800 inches per
minute.
B. MIG/TIG VOLTAGE SWITCH
Twelve position switch provides
"4" TIG (requires optional TIG
PACK) and "8" MIG voltage set-
tings.
C. VOLTMETER
Indicates open circuit voltage
when torch trigger switch is
activated and arc (welding)
voltage during welding.
D. CIRCUIT BREAKER
Primary power switch and over-
load protection device.
E. "ON" INDICATOR LIGHT
Illuminates when the circuit
breaker on the machine is "ON".
FIGURE 11. FRONT PANEL
