Adjust Controls (Preflow/Post Flow/Dig/Purge) - Miller Maxstar 300 LX Owner's Manual

5-10. Adjust Controls (Preflow/Post Flow/DIG/Purge)

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Some features shown are
not available on all models.
OM-2222 Page 30
3
1 Adjust
Press switch pad until desired function
LED is illuminated.
2 Encoder Control (Set Value)
3 Ammeter (Displays Value)
See Section 5-14 for all Adjust parameter
2
ranges.
PREFLOW - If the TIG HF process is ac-
tive (see Section 5-6) and Preflow is
shown on the control panel, use control to
set length of time gas flows before arc ini-
tiation. To set Preflow time for models that
do not have Preflow Time control on the
front panel, see Section 5-13.
Application: Preflow is used to purge
the weld area, and aids in arc starts.
POST FLOW - If the TIG process is ac-
tive (see Section 5-6), use control to set
length of time gas flows after welding
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.
1
DIG - If the DC Stick process is active
(see Section 5-6), 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 verti-
cal or overhead welds by increasing am-
perage at low arc voltage, and reduces
electrode sticking while welding.
PURGE - To activate the gas valve and
start the purge function, push and hold
the Adjust switch pad for the desired
amount of time. To set from 1 to 50 sec-
onds of purge time, hold the Adjust switch
pad while turning the encoder control.
Default is 0.
While Purge is active, (-P-) is shown in the
left display, and purge time is shown in
the right display.
Pressing any switch pad will end the
purge display, but gas will continue to flow
until the preset time has timed out.
Application: Purge is used to clear the
gas lines.