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13
Section 1 Introduction and Specifications
General Features and Terms:
1.
Adjustable Pre/Post Flow Control. The Pre and Post
-
Flow control feature is designed to improve weld quality at the begin-
ning and end of the weld where porosity and oxidation is likely to occur. Pre and post flow time is manually adjusted up or
down based off of desired shielding effect to prevent porosity. Of course, the flow times can be shortened to conserve gas if
pre and post weld shielding of the gas is not a concern. A short Pre
-
Flow time of about .3 to .5 seconds and a Post
-
Flow
time of about 2 to 3 seconds is a reasonable starting point when employing these features. Keep in mind that a long Pre
-
Flow time will delay the arc start and wire will not feed the wire until the Pre
-
Flow time is satisfied. Add more flow time if
porosity or oxidation or excessive discoloration is noticed at the beginning and end of welds. Hold the gun in place over the
cooling weld until post flow has terminated or the effect will be lost and gas will be wasted.
2.
Burn
-
Back Control. The Burn
-
back feature is used to control the length of the wire stick
-
out after the trigger is released. It
helps to prevent the welding wire from sticking in the coalescing weld puddle after the arc is terminated. It also saves the
user from having to trim the wire before restarting the arc. Burn
-
Back control consists of two settings: Burn
-
Back time and
Burn
-
Back Volts. Typically Burn back time is set long enough to prevent wire sticking in the weld puddle. The wire should
melt back to the point where trimming is not required to restart the arc and no wire sticking is observed. Burn back time is
usually adjusted to less than .1 seconds, but more time can be added as needed. Thicker wires will need longer burn back
times. For a starting point in Synergic pulse modes, Burn
-
Back Volts (now displayed as trim/Volt offset value) should be set
for a lower value than the trim/Volt offset value used for regular welding.
3.
GMAW Process (MIG). The digitally
-
controlled MIG components precisely control arc functions and give real
-
time feed back
about the welding output parameters. Both Single Pulse and Double Pulse modes are synergically based and make welding
in pulse modes as simple as selecting the correct amperage to match the thickness of the weld. Arc length can be
“
trimmed
”
to the desired length with the voltage offset feature. As already mentioned, the Power i
-
MIG 353DPi is also spool gun and
push
-
pull gun (optional) ready for Aluminum welding or and brazing if needed. Both the spool gun and the push
-
pull gun
unit will function in all MIG modes and with all synergic Pulse settings. The welder can also be used with the flux
-
core wire
(FCAW) when equipped with optional serrated drive rolls. However, if Flux
-
Core is used in synergic mode and synergic
Pulse modes, the welder will not operate correctly. Even with significant adjustment of trim and inductance settings, prob-
lems achieving desirable welds may be encountered. When attempting to use Flux
-
Core or Dual
-
Shielded wires, the stand-
ard mode (without the synergic function enabled) should be used for the most reliable operation.
4.
Slow Run
-
in of Wire. This feature improves arc striking quality in MIG modes by helping prevent arc stuttering (machine
gunning) and push
-
off during arc initiation by slowing the wire speed until the arc is established. Once the arc is established,
the wire feed speed automatically begins to rapidly ramp up to weld at the desired wire speed/Amps. Note: The slow run
-
in
feature prevents the operator from taking accurate measurements of wire feed speed manually as the wire will feed slower
until the arc is struck and maintained. This is not an adjustable feature and cannot be deactivated.
5.
SMAW (Stick). In stick mode the Power i
-
MIG 353DPi delivers a smooth DC low spatter arc. Professional, high
-
quality welds
are obtainable with E7018, 7014, 309L, 316, 6011 and many specialty rods that are designed for use with any stick welder.
NOTE: This unit is not designed for E6010 use. The Stick mode also features adjustable Hot Start intensity control which is
designed to help reduce sticking during arc starts. It will also simultaneously help reduce porosity or inclusions during arc
initiation. The stick arc force control adjusts the quality and feel of the welding arc. The arc force is used to adjust the amp
reaction when the arc gap is shortened and voltage drops. This helps to prevent sticking of the welding rod and helps main-
tain the arc going as arc voltage falls. This action also boosts penetration and controls overall
“
feel
”
of the arc.
6.
Spool Gun and Push
-
Pull Gun Modes. The Power i
-
MIG 353DPi is well equipped to handle the aluminum welding needs of
most customers by being both spool gun and push
-
pull gun ready. The unit can handle several different Everlast spool gun
models, but the most capable and recommended is the 300 amp, Parker® DSP 360A spool gun. However, for professional
fabricating and repair needs, the Parker® SGP 360A Push
-
Pull Gun is an excellent choice to handle welding duties that
require serious or frequent aluminum welding capability. The pull motor on the push
-
pull gun is synchronized with the main
wire feeder in the welder cabinet to weld seamlessly with larger rolls of aluminum wire. When coupled with a push
-
pull gun,
the pulse feature of the Power i
-
MIG 353DPi can greatly increase the quality and speed of out
-
of
-
position welds common in
production welding applications of aluminum. NOTE: Operation of the welder with the Push
-
Pull gun may require the pur-
chase of additional Push
-
Pull drive rolls to match the wire diameter used. Also make sure that if welding aluminum or
bronze with the push
-
pull gun, or the standard MIG gun, the main feeder drive rolls are changed to the U groove type and
that the grooves match the diameter of the wire used. The U
-
shaped groove prevents deformation of the soft aluminum and
bronze wire as the wire is fed. This prevents feeding problems in both the long and short terms.
7.
Synergic MIG Operation. The synergic welding modes are designed to simplify welder setup and adjustment. Synergic MIG
welding allows the customer to input basic parameters of wire type and wire diameter and the machine will automatically set
the unit up to operate based off fully tested algorithmic settings chosen by factory welding engineers. The user only needs to
adjust welding Amps to match the thickness of the metal being welded. Then unit
’
s programming automatically sets the bal-
ance of the relevant parameters. The unit
’
s programming allows fine tuning of the arc length and wire stick out with the use
of the Voltage/Trim adjustment and Inductance control. The machine can be operated synergically in standard MIG mode,
and Single Pulse Mode. For Double Pulse Mode, the half cycles are synergically adjusted (see full explanation found later in
this manual in the detailed Pulse MIG explanation found later in this manual).
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