Adjust Controls (Preflow/Post Flow/Dig/Purge) - Miller DYNASTY 200 DX Owner's Manual

5-11. Adjust Controls (Preflow/Post Flow/DIG/Purge)

.
Some features shown are
not available on all models.
3
1 Adjust
Press switch pad until desired function
LED is illuminated.
2 Encoder Control
3 Ammeter
Turn encoder (see Section 5-2) to set ap-
2
propriate value for active Adjust parame-
ter. Value selected is shown on the am-
meter (see Section 5-4). Also, the am-
meter LED for the corresponding unit of
measure (S, %) of the active parameter
will be illuminated.
See Section 5-16 for all Adjust parame-
ter ranges.
PREFLOW - If the TIG HF process is ac-
tive (see Section 5-7) and Preflow is
shown on the control panel, use control
to set length of time gas flows before arc
initiation. To set Preflow time for models
that do not have Preflow Time control on
the front panel, see Section 5-15.
Application: Preflow is used to purge
the immediate weld area of atmosphere.
Preflow also aids in consistent arc starts.
POST FLOW - If the TIG process is ac-
tive (see Section 5-7), use control to set
length of time gas flows after welding
1
stops.
Application:
Postflow is required to cool tungsten and
weld, and to prevent contamination of
tungsten and weld. Increase postflow
time if tungsten or weld are dark in ap-
pearance.
DIG - If the DC Stick process is active
(see Section 5-7), use control to set
amount of DIG. When set at 0, short-cir-
cuit amperage at low arc voltage is the
same as normal welding amperage.
When setting is increased, short-circuit
amperage at low arc voltage increases.
Application:
Control helps arc starting or making ver-
tical or overhead welds by increasing
amperage at low arc voltage, and re-
duces electrode sticking while welding.
PURGE - While in the TIG process (see
Section 5-7), to activate the gas valve
and start the purge function, push and
hold the Adjust switch pad for the desired
amount of purge time. To set from 1 to 50
seconds of additional purge time, contin-
ue to hold the Adjust switch pad while
turning the encoder control. Factory de-
fault setting is 0.
While Purge is active, (PUR) is shown in
the left display, and purge time is shown
in the right display.
Pressing any front panel switch pad will
end the purge time display, but gas will
continue to flow until the preset time has
timed out.
Application: Purge is used to clear the
shielding gas lines of contaminates.
OM-2240 Page 29