Thermal Arc ULTRA FLEX 350, Руководство пользователя

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I
bak
(min): I
bak
(min) refers to a minimum back-
ground current level. If the current falls below this
minimum level, it becomes difficult to maintain a
stable arc.
Arc Length: The distance between the end of the
wire electrode (the wire being fed through the torch
or gun) and the weld pool. This distance is usually
set to give a smooth, spatter-free weld.
The Ultra Flex
®
350 Pulse machine comes with 8
pre-programmed weld schedules for use in the
Pulsed MIG mode. Each schedule was developed
around the particular wire/gas combination given in
tables 5-2. These schedules should give good re-
sults for most applications. It is possible to use a
number of other wire and gas combinations other
then those listed. It will be necessary, however, for
the user to determine the optimum weld schedule to
use.
For welding applications where none of the 8
schedules will give adequate results, any or all 8
schedules can be changed by the operator to fit the
application. In order to change them, an optional
Programming Pendant (204180A-1) is required.
The programming pendant plugs into the PRO-
GRAMMING PENDANT connector located on the
front of the Ultra Flex
® (Item 2, Figure 3-3). Using
the Pendant, a schedule can easily be modified by
changing I
pk
, T
pk
, and V
BAK
to give the proper weld
characteristics.
1. Connect the wire feeder to the power source
using the 19 pin amphenol receptacle on the rear of
the power source.
2. Connect the welding leads to the power source
and wire feeder.
SCHEDULE
STD
WIRE TYPE
WIRE
SIZE
(inches)
I
st
(Amps)
I
pk
(Amps)
T
pk
(msec)
V
Bak
(Volts) GAS MIXTURE
1
Mild Steel
.035 350 300 2.5 20.0
92% Ar 8% CO
2
2
Mild Steel
.045 450 350 2.5 20.0
92% Ar 8% CO
2
3
Stainless Steel
.035 350 276 2.6 18.0
81% Ar 1% CO
2
18% He
4
Stainless Steel
.045 400 326 2.8 19.0
81% Ar 1% CO
2
18% He
5
Aluminum
.035 400 224 1.4 17.0
100% Ar
6
Aluminum
3/64 450 274 1.4 17.0
100% Ar
7
Metal Core
.045 450 400 1.5 16.0
92% Ar 8% CO
2
8
Nickel
.035 350 276 2.6 18.0
75% Ar 25% He
Table 5-2 Pulse MIG Schedules
For The Ultra Flex
®
350
Figure 5-4 Pulse Waveforms
430429-465
OPERATION
February 28, 2000 5-7