Tweco 2460 Heavy Duty CC CV Control Wire Feeder - Manual (Page 26)

Fuse 5 A — Protects motor from excessive stall
current.
Label — Identifies 5 A fuse rating and location
(inside control box).
CC/CV Switch — This is a two-position switch that
controls the droop characteristics of the motor con-
trol circuit. When in the CV position, the circuit uses
IR compensation giving an almost flat speed torque
curve. When in the CC position, the IR compensa-
tion is eliminated and the speed torque curve has a
fairly high droop. The CV position is recommended
for all CV types of power sources. The CC position
is generally recommended when using a CC power
source. For many types of wires however, the CV
position is recommended even when a CC power
source is used.
A 12-volt gas valve and P.C. Board control the
shielding gas for solid wire welding. Welding gas will
flow when the gun switch is closed.
The circuit board uses the output voltage of the
bridge rectifier CR1 and converts this output into a
12-V DC voltage. The gas valve is a part of the total
DC to DC converter circuit and is always connected
in the circuit.
The circuit board is installed next to the motor
control board.
Installation
Location
The model 2460 heavy duty CC/CV wire feeder is
designed to withstand high moisture conditions en-
countered in outdoor welding applications. How-
ever, the wire feeder is not waterproof and therefore
should not be stored outdoors for extended periods
of time.
Connections
1. Make sure that the proper welding cable con-
nections exist between the feeder feedhead (elec-
trode) to power source and work connection to
power source. Connect Feeder work lead (Figure 1)
to work.
Figure 2 Connections (Rear End of Enclosure)
TIP-218
CONTROL BOX ASSEMBLY NO. 376783A & 376783B
Page 2 May 29, 1996 Revised