Tweco 281 Thermal Arc Fabricator - Manual (Page 43)

FABRICATOR 281
April 10, 2006 4-5
Positive and Negative Welding Terminal Knobs
Welding current flows from the Power Supply via
heavy duty terminals. It is essential, that these terminal
knobs are tight to achieve the necessary electrical
connection.
CAUTION
Loose welding terminal connections can cause
overheating and result in failure of the
terminals.
Gun Switch Receptacle
The Torch Trigger 4-pin receptacle is used to connect
the two wires from the torch gun to the Fabricator
281. Only pins 1 and 2 are used for this.
To make connections, align keyway, insert plug, and rotate
threaded collar fully clockwise.
1
2
Art # A-07171
Figure 4-3: Gun Switch Receptacle
Spool Gun Interface Amphenol Connector
The Spool Gun Interface 10 pin connector is used to
connect a spool gun to the A2281 Wirefeeder (refer
to Figure 4-4 and Table 4-1).
A
B
C
D
J
I
E
F
G
H
Art # A-07181
Figure 4-4: Spool Gun 10 pin receptacle
To make connections, align keyway, insert plug, and
rotate threaded collar fully clockwise. The socket
information is included in the event the supplied cable is
not suitable and it is necessary to wire a plug or cable to
interface with the SPOOL GUN 10-pin receptacle.
Socket Pin Function
A Not Used
B Spool Gun Motor (-)
C Spool Gun Motor (+)
D Spool Gun Switch
E
Spool Gun Speed C.W.
Potentiometer
F
Spool Gun Speed Wiper
Potentiometer
G Spool Gun Switch
H
Spool Gun Speed C.C.W.
Potentiometer
I Not Used
J Not Used
Table 4-1: 10-pin Receptacle Pin Functions
NOTE
When the SPOOL GUN is properly attached
and the trigger is depressed, the system
automatically disables the internal wire feed
and gas control and selects the SPOOL GUN
feeder and gas control.
Wirefeeder Control Socket
The Wirefeeder 7 pin receptacle is used to connect a
Wirefeeder to the welding Power Source.