Ac Waveshape (Dynasty Models Only); Spot Time Control (Reconfigured Rmt 2T Hold Output Selection) (All Models) - Miller Dynasty 300 SD Owner's Manual

5-13. AC Waveshape (Dynasty Models Only)

5-14. Spot Time Control (Reconfigured RMT 2T HOLD Output Selection) (All Models)

SPO
3
1
1.0
2
1
3
Or
Or Or
2
1 AC Waveshape
Press switch pad until desired func-
tion LED is illuminated.
2 Encoder Control (Set Value)
3 Ammeter (Displays Value)
See Section 5-17 for all AC Wave-
shape parameter ranges.
Balance: AC Balance Control is
enabled only in AC TIG to set per-
centage of time polarity is electrode
negative.
Application:
When welding on oxide forming ma-
terials such as aluminum or magne-
sium, excess cleaning is not neces-
sary. To produce a good weld, only
0.10 in (2.5mm) of etched zone
along the weld toes is required.
Joint configuration, set-up, process
variables, and oxide thickness may
affect setting.
AC Frequency: AC Frequency
Control is enabled only in AC TIG.
Use control to set AC frequency
(cycles per second).
Application:
AC frequency controls bead width
and directional control. As AC fre-
quency decreases, weld bead/
puddle gets wider. As AC frequency
increases, weld bead/puddle be-
comes narrower and the arc be-
comes more focused. Travel speed
can increase as AC frequency in-
creases.
1 Spot Time Meter Display
Select Spot function according to
Section 6-2C.
2 Amperage Switch Pad
3 Encoder Control
To set spot parameters, press Am-
perage switch pad once (meter A
LED turns on) and turn Encoder to
set spot amperage. Press Amper-
age switch pad again, (meter S LED
lights) and turn Encoder to set spot
time (.1−25 seconds). Default is 1
second.
Application: To provide a timed
weld for tacking and thin sheet join-
ing.
OM-358 Page 27