Tweco Hefty II CC CV Voltage Sensing Wire feeder - Manual (Page 14)

DESCRIPTION OF EQUIPMENT
General:
The HEFTY II STAINLESS is a portable, solid state
controlled, voltage sensing wire feeder that operates on
arc voltage and can be used with most constant voltage
(CV) and constant current (CC) DC-type power sources.
The only connection required between the power source
and the wire feeder is the welding cable.
The unique design of this wire feeder allows op-
eration in a constant wire feed speed mode when
used with CV power sources, and in a voltage
sensing wire feed speed mode (wire feed speed
varies with respect to arc voltage) when used with
CC power sources.
The stainless steel case totally encloses the solid
state control circuitry, welding wire, and wire drive
system. A hinged, latched door allows quick and
easy access to the welding wire and feedhead
assembly that features quick change, gear-driven
feed rolls and a hand operated knob for clamping
the welding gun into the feedhead.
The HEFTY II STAINLESS comes with an abun-
dance of standard features, which include: (1)
on/off rocker switch, (2) wire feed speed control
knob, (3) inch/purge switch, (4) carrying handle, (5)
contactor, (6) gas valve, (7) CC/CV mode switch,
(8) input circuit breaker for complete system protec-
tion, (9) electronic controlled protection circuitry to
protect against an undervoltage, an overvoltage, a
voltage spike, a shorted or locked motor, a shorted
contactor coil, and a shorted gas valve, (10) elec-
tronic controlled dynamic brake, (11) electronic con-
trolled current limit to motor, (12) electronic
controlled start circuit for improved arc starting, (13)
low voltage gun trigger circuit for operator safety,
and (14) a feed roll kit for 0.035 and 0.045 size filler
wire.
The HEFTY II STAINLESS has been designed to
comply with CSA NRTL/C and NEMA EW 3 stand-
ards.
Product Specifications:
Input Voltage Range ..........................15 - 100 VDC
Input Frequency ..................................... 0 Hz (DC)
Maximum Input Current.............................. 8 Amps
Wire Speed Range
(Dependent On Arc Voltage) .......... 50 - 700 IPM
..................................................... (1.3 - 17.8 MPM)
Wire Sizes ........................................ 0.024 - 5/64"
......................................................... (0.6 - 2.0 mm)
Maximum Wire Spool Capacity ...... 12" (304.8 mm)
....................................................... 30 Lbs. (13.6 kg)
Feed Rolls ............................. 2 (Both Gear Driven)
Welding Current (I) ........... 330A at 60% Duty Cycle
Welding Gun Diameter ....................... 5/8" Nominal
Maximum Shielding Gas Inlet Pressure ....... 75 PSI
Weight (Less Wire)...................... 38 Lbs. (17.2 kg)
Approvals .......................................... CSA NRTL/C
........................................................... NEMA EW 3
Figure 3-1 Dimensional Information
430429-456
DESCRIPTION OF EQUIPMENT
June 5, 2000 Revised 3-1