The location and function of the controls used in the
3.2 GENERAL
operation of the Feeder are listed in Table IV. Also
l i s t e d are components closely related to Feeder
The Feeder should only be operated when connected
operation.
within an AIRCOMATIC welding system, This sec-
tion covers only pre-weld requirements such as setting
the wire feed speed dial, a pre-weld checklist, an
operating sequence (Fig. 10) and inspection during and
3.3 SETTING WIRE SPEED DIAL
after operation. As additional aids toward understand-
ing this system, a schematic diagram (Fig. 11) and
Manually set the desired wire feed speed on the dial
wiring diagram (Fig. 12) are included at the end of
of the wire feed speed dial (Fig. 3), as follows:
this section.
TABLE IV
Functions of Controls and Selected Electrical Components
Control or
Function
Symbol
Component
For manual setting of desired wire feed
Wire Feed Speed
Rlll
speed. Rated: 0-20, 000 ohms, 5W, con-
Potentiometer
tinuously variable.
Dial (Fig. 3)
Functions in parallel with Rlll when PUSH-
R113
PULL switch SW107 is in PULL position to
adapt Rlll for pull operation.
PUSH- PULL
PUSH position (for push guns) opens brake
SW107
Switch (Fig. 4)
solenoid circuit to apply drag on wire reel,
PULL position (for pull guns) closes brake
solenoid circuit to retract brake and remove
drag.
LOCAL position switches Wire Feed Speed
SW103
LOCAL-REMOTE
Potentiometer (Rlll) into motor control
Switch (Fig. 4)
circuit so that speed can be hand-set at
panel dial,
REMOTE position switches Rlll out of and
Remote Control (R112) into motor circuit
so that speed can be set on the remote
control.
TG101
Produces electrical equivalent of existing
motor speed for motor control circuit in
Generator (Fig. 4)
control unit.
BS101
Retracts brake during pull operation of
Solenoid:
Brake (Fig. 11)
Feeder when energized by pull gun trigger,
Upon release of trigger, brake engages.
Allows gas flow during push or pull opera-
Gas (Fig. 12)
GS101
tion of Feeder when energized by gun
trigger,
Water (Fig. 12)
Allows water to flow during push or pull
WSl0l
operation of Feeder when energized by
gun trigger.
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