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Snap-on Tools Corporation Kenosha, WI 53141-1410
SHORT ARC OR DIP TRANSFER (Cont.)
This sequence of events is re-
peated up to 200 times per second.
Short arc transfer is suitable for
positional welding. The heat input
to the workpiece is kept to a
minimum which limits distortion and
makes possible the welding of thin
sheet material.
GLOBULAR TRANSFER
Globular transfer occurs at the
intermediate range of 22 to 24 arc
volts, depending on wire size. As
the name implies, the transfer
takes place in the form of irregu-
larly shaped globules. Globular
transfer is useful in cases where a
lower heat input than that of true
spray is required.
DESCRIPTION
The MIG220 consists of a
combination MIG welding power
source and wire feed unit, a 15TG10
MIG torch, a ten foot ground
cable with ground clamp, a twenty
foot power input cable, a gas
regulator - flowmeter, and a built-
in cylinder rack and industrial wheel
kit. Welder components are cooled
by forced fan cooling.
by forced fan cooling.
Welder controls are simple and
clearly marked. The output voltage
is controlled by a twelve position
tap switch, providing twelve volt-
age selections. Voltages can be
monitored by the voltmeter on the
control panel. Wire feed speed is
controlled by the wire speed poten-
tiometer.
SPECIFICATIONS
PART NUMBER:
MIG220
INPUT POWER REQUIREMENTS:
Voltage 208/230
volts
AC
single
Phase
phase
Frequency 50/60 hertz
Current
cycle
duty
@60%
26/24 amps
NOTE
This welder draws 20 amps at
100% Duty cycle (140
amps
output). A 40 amp 208 or 230
volt electrical service is
required for proper arc start-
ing and full utilization of
its maximum output of 220
amps.
DUTY CYCLE - OUTPUT POWER:
Welding Current
(NEMA) @ 60% 180 Amps
@ 20% 220 Amps
DUTY CYCLE TIME PERIOD:
10 minutes
OPEN CIRCUIT VOLTAGE:
15 - 37.5 volts DC
ELECTRODE
GAS NOZZLE
SHIELDING GAS
WORK
SPRAY TRANSFER
Spray transfer occurs at 22 to 28
arc volts, depending on wire size.
The length of the arc is held
constant by the voltage available.
The higher voltage and current
causes the electrode wire to melt
off before touching the workpiece.
The molten metal crosses the gap to
the workpiece in a spray form.
Spray transfer is used in the down-
hand position and provides higher
deposition rates than short arc
transfer or globular transfer.
ELECTRODE
GAS NOZZLE
SHIELDING GAS
WORK
FIGURE 3. GLOBULAR TRANSFER
FIGURE 4. SPRAY TRANSFER
