Stick Hot Welding Mode - Smaw/Cac-A Process; Optional Low Open Circuit Voltage (Ocv) Welding Modes - Miller XMT 350 MPa Owner's Manual

9-3. Stick Hot Welding Mode - SMAW/CAC-A Process

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Weld terminals are energized at all
times in Stick Hot welding mode.
1 Mode Switch
2 Volts Indicator
3 Left Display
4 Right Display
5 Amps Indicator
6 Adjust Control
7 Arc Control Indicator
8 Setup Button
Setup
For typical system connections refer to
Section 9-1.
Rotate Mode Switch to STICK HOT posi-
tion as shown.
The open circuit voltage is shown in the Left
Display with the Volts Indicator lit, and the
preset amperage is shown in the Right Dis-
play with the Amps Indicator lit.
Operation
While the Amps Indicator is lit under the
9-4.

Optional Low Open Circuit Voltage (OCV) Welding Modes

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Right Display, the Adjust Control is used to
set desired preset amperage.
Pressing the Setup Button allows adjust-
ment of Arc Control, Hot Start Current, and
Hot Start Time.
.
For best results at the end of the weld,
pull back the electrode quickly to extin-
guish the arc.
Arc Control (Dig)
Press the Setup Button so the Arc Control
indicator is lit. DIG appears on the Left Dis-
play, and the corresponding dig setting ap-
pears on the Right Display.
Rotate Adjust Control to select desired dig
setting from 0 to 100.
Dig control allows the arc characteristics,
soft versus stiff, to be changed for specific
applications and electrodes. Lower the dig
setting for smooth running electrodes like
E7018 and increase the dig setting for stiff-
er, more penetrating electrodes like E6010.
Press the Setup Button repeatedly until the
Arc Control light goes out to return to ad-
justment of preset amperage.
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Programmable Hot Start
Press the Setup button repeatedly until
HOT.S appears on the left display. HOT.S
adjusts the Hot Start Amperage to Adaptive
Hot Start (AUTO) or from Min (1) to Max
(50). Adaptive Hot Start (AUTO) automatic-
ally chooses a default amperage. The Min
(1) setting results in no hot start amperage.
Higher numbers result in higher start am-
perage.
Press the Setup button again so HOT.T ap-
pears on the left display. HOT.T adjusts the
Hot Start Time to Adaptive Hot Start
(AUTO) or from Min (1) to Max (50). Adapt-
ive Hot Start (AUTO) automatically
chooses a default time. The Min (1) setting
results in no hot start time. Higher numbers
result in longer start time.
Press the Setup button to return to adjust-
ment of preset amperage.
.
Use this mode for Air Carbon Arc
(CAC−A) cutting and gouging. For best
results, adjust dig setting to maximum.
Low OCV Operation
The unit can be optionally configured for low
open circuit voltage (OCV) operation in Stick
and Scratch Start TIG modes. When the unit
is configured for low OCV operation only a low
sensing voltage (approximately 15 VDC) is
present between the electrode and the work-
piece prior to the electrode touching the work-
piece. Consult a Factory Authorized Service
Agent for information regarding how to config-
ure the unit for low OCV welding operation.
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