Miller STi 270, Owner'S Manual

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OM-263 706 Page 15
5-2. Preparing Unit For Stick (SMAW) Welding (STi 270 Model Shown)
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1 Positive Weld Output Receptacle
2 Negative Weld Output Receptacle
3 Amperage/Parameter Control
4 Arc Force Indicator Light
5 Hot Start Indicator Light
6 Amperage Indicator Light
7 Ammeter/Voltage Display (Meter)
8 Process Control
See Section 5-4.
9 VRD Selector Switch (STi 270
Models)
9a CELL/VRD Selector Switch (STi
270C Models)
10 Parameter Selector Switch
Connect electrode holder and work clamp
(see Section 4-5). Turn power on. Allow
time for unit to complete its start-up cycle.
Press and release Process control to se-
lect Stick welding and light corresponding
LED.
Voltage Reduction Setting (VRD) (STi
270 Model)
To change voltage reduction setting (VRD),
proceed as follows: press and release the
VRD switch to select VRD (LED I) or dis-
able VRD (LED 0). Voltage reduction de-
fault is 12 volts.
Stick Cellulosic Function Setting
(CELL)
To select Cellulosic function (CELL), pro-
ceed as follows: press and release the
CELL/VRD switch to enable CELL function
and light corresponding LED.
Cellulosic electrode provides outstanding
arc stability and penetration. It’s ideal for
welding in all positions.
Hot Start
Use Hot Start to increase output amperage
at the start of a weld to help prevent elec-
trode sticking. To change Hot Start setting,
proceed as follows: press and release pa-
rameter switch until Hot Start light is on.
Use the Amperage/Parameter control to
adjust the Hot Start value.
Arc Force
Use Arc Force to increase short-circuit am-
perage at low arc voltage. Set at 0 for nor-
mal welding amperage. Turn control clock-
wise to increase short-circuit amperage. To
change Arc Force setting, proceed as fol-
lows: press and release parameter switch
until the Arc Force light is on. Use the Am-
perage/Parameter control to adjust the Arc
Force value.
.
Unit will automatically exit the set-up
menu if no activity is detected for more
than five seconds. Press and release
the parameter switch to re-enter set-up
mode.
Weld Amperage
Use control to adjust welding amperage
(see Section 5-7).
6
5
4
3
1
2
10
9
8
7
1
9a