Tweco Hefty II CC CV Voltage Sensing Wire feeder - Manual (Page 19)

Internal Controls And
Connections (Wire Spool Side):
See Figure 3-4 for details.
13. WELD CABLE CONNECTION - This is where
the weld cable from the power source connects to
the wire feeder. Connections must be tight; other-
wise, arcing or overheating could result.
NOTE: The mating connector for the weld
cable connection has been supplied with
the unit and is located in the owner’s man-
ual bag.
14. GAS VALVE INLET - This is where the shield-
ing gas hose (if used) is connected to the wire
feeder.
15. HUB TENSION BOLT - The hub tension bolt
is used to adjust the wire spool tension which acts
as a mechanical brake to assist in the stopping of
the welding wire at the completion of a weld.
16. INCH/PURGE SWITCH - Depressing the inch
portion of the switch will feed wire at a speed set by
the wire feed speed control. The wire will not be
electrically “hot” when using the inch switch. De-
pressing the purge portion of the switch will allow
shielding gas to flow out of the welding gun without
feeding wire.
17. GUN SWITCH RECEPTACLE - The gun
switch receptacle accepts the welding gun control
wires. The gun switch receptacle is where a gun
switch closure is inputted to the wire feeder.
18. VOLTAGE SENSING LEAD - This lead
serves as an input power connection point for the
wire feeder and must be connected to the work
piece for proper operation. If the voltage sensing
lead from the wire feeder and the weld cable from
the power source are not connected to the work
piece, the wire feeder will not work.
Description Of Feedhead
Assembly:
See Figure 3-5 for details.
19. LOWER RETAINING KNOB - This knob is
used to secure the drive feed roll. Remove this knob
to change the drive feed roll.
20. INPUT WIRE GUIDE - This guide is required
to direct the welding wire from the wire spool to the
drive feed roll.
21. INPUT GUIDE LOCKSCREW - Tighten this
screw to secure the input wire guide.
22. SPRING TENSION KNOB - Use the spring
tension knob to adjust the amount of force the
bearing feed roll exerts on the welding wire.
23. UPPER RETAINING KNOB - This knob is
used to secure the bearing feed roll. Remove this
knob to change the bearing feed roll.
24. OUTPUT GUIDE LOCKSCREW - Tighten
this screw to secure the output wire guide.
Figure 3-4 Internal Controls And Connections
(Wire Spool Side)
430429-456
DESCRIPTION OF EQUIPMENT
3-6 November 17, 1999