Preparing Unit For Tig Welding (Sti Model) - Miller Electric Si 160 Owner's Manual

4-6. Preparing Unit For TIG Welding (STi Model)

=Light Off
*
=Light Flashing If Voltage Reduction Device Is On
Process Selection
8
7
Press And Release
Weld output terminals are ener-
gized when power is On, and
Ready Light is lit.
1 Positive Weld Output Terminal
2 Remote Control Receptacle
3 Negative Weld Output Terminal
4 Amperage/Set-Up Adjustment
Control
5 Ammeter And Parameter Display
(Meter)
6 Process/Set-Up Selector Switch
7 TIG Welding Light (LED)
8 Ready Light (LED)
9 Set-Up Light ( LED)
Prepare unit for TIG welding as follows:
Connect electrode holder to negative
weld output receptacle.
Connect work clamp to positive weld out-
put terminal.
If desired, connect a remote control to the
remote control receptacle.
Turn power on. Allow time for unit to com-
plete its start up cycle.
Press and release Amperage/Set-Up
Adjustment control to select TIG welding
and light corresponding LED. Display
meter displays TIG for three seconds
=Light Flashing
=Light On
Set-Up Menu
*
6
Press And Hold
and then the factory default setting of 50
amperes.
Voltage Reduction Setting
To change voltage reduction setting, pro-
ceed as follows:
Press and hold Amperage/Set-Up Ad-
justment Control to enter set-up mode.
Upon entry, the Set-Up light begins to
flash, and the display meter displays
VRD.
Voltage Reduction default is Off. Use
Amperage/Set-Up Adjustment control to
enable or turn setting On.
When Voltage Reduction is enabled, TIG
Welding light flashes continuously. VRD
is set to 20 volts.
.
Unit will automatically exit the set-up
menu if no activity is detected for
more than three seconds. Press and
hold Amperage/Set-Up Adjustment
control to re-enter set-up mode.
Slope Down Setting
To change Slope Down setting, proceed
as follows:
While in the set-up menu, press and re-
lease the Process/Set-Up Selector
9
1
2
switch. The Set-up light continues to
flash.
The display meter will display SL.
Use the Amperage/Set-Up Adjustment
control to reduce amperage over a set
period of time (0−10 seconds) at the end
of the weld. The default setting is 0
seconds.
Application:
Slope Down should be used while TIG
welding materials that are crack sensit-
ive, and/or the operator wants to elimin-
ate the crater at the end of the weld.
Anti Stick
Anti Stick prevents the electrode from
sticking while welding.
This function is automatically active while
using the TIG welding process. Anti Stick
increases amperage when arc voltage is
below four volts for more than two
seconds.
.
The amperage range while TIG
welding is from 4 to 160 amps.
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4
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OM-250 147 Page 17