Miller DYNASTY DX, Technical Manual

Page: 11 / 80

TM-357 Page 9 Dynasty DX
SECTION 3 – OPERATION
3-1. Controls
Ref. ST-187 198
1 AC Frequency Control
Range is 20 to 250 hertz. For most applica-
tions, increasing frequency improves arc
stability.
2 Balance/DIG Control
Control functions as a balance control for
GTAW (TIG) process, and in the DIG mode
for SMAW (STICK) process, depending on
position of Process control.
Balance Mode:
See Section 3-2.
DIG Mode:
When set lower, short-circuit amperage at
low arc voltage is the same as normal
welding amperage.
When set higher, short-circuit amperage is
increased at low arc voltage to help with arc
starting and making overhead or vertical
welds, as well as to reduce sticking while
welding.
3 Voltmeter (see Section 3-3)
Voltmeter displays voltage (to the nearest 0.1
V) at the weld output terminals, but not nec-
essarily the welding arc due to cable resis-
tance, poor connections, etc.
4 Ammeter (see Section 3-3)
Use ammeter to preset amperage. Meter dis-
plays weld amperage output of unit when
welding.
5 Amperage Adjustment Control
Turn control clockwise to increase amperage
from 5 to 300 amps.
6 Output Control Switch
See Section 3-4.
7 Amperage Control Switch
For front panel control, place switch in Panel
position.
For remote control, make connections to
remote 14 receptacle, and place switch in
Remote 14 position.
8 Trigger Hold
To start weld, press and release gun trigger
within three seconds after an arc has been
struck. To end weld, press and release gun
trigger. If gun trigger is not released within 3
seconds, unit switches to standard trigger
control operation.
9 Process Control
Use control to select either of the GTAW
(TIG) welding process and polarity, or the
SMAW (Stick) welding process.
Selecting any GTAW (TIG) position enables
the gas valve, which is disabled when SMAW
(Stick) position is selected.
10 Sequence Control
See Section 3-5.
11 Start A (Amperage) Control
Use control to select a starting amperage
that is different from the weld amperage.
12 Start t (Amperage Time) Control
Use control to select length of time in
seconds that amperage remains at start
amperage before changing to weld
amperage.
For example, to select start amperage of 300
A for 3 seconds and weld amperage of 200
A: Set Start A amperage control to 300 A, set
Start t time control to 3 seconds, and set front
panel or remote amperage control to 200 A.
13 Crater Control
Control sets length of time in seconds to
taper weld output from weld amperage
setting to 0 A .
14 Postflow Control
Control sets length of time in seconds gas
flows after the welding stops.
1 2
3 4
5
8
6
7
9 14 11 10
12
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