Miller Dynasty 400 Owner's Manual page 68

B. 3T Specific Trigger Method
3T Trigger Operation
* Arc can be extinguished at any time by
pressing and releasing both initial and final
switches, or by lifting the torch and breaking
the arc.
P/R = Push and Release (in less than 3/4 of
a second)
P/H = Push and Hold
R = Release
I = Initial Switch
F = Final Switch
Sequencer is required to reconfigure for 3T.
3T requires a specific type of remote control
with two independent momentary-contact
switches. One will be designated initial
switch, and it must be connected between
Remote 14 receptacle pins A and B. The
second will be designated as the final
switch, and it must be connected between
Remote 14 receptacle pins D and E.
To select 3T, turn Encoder control.
OM-275857 Page 58
Definitions:
Initial slope rate is the rate of amperage
change determined by the initial amperage,
initial slope time, and main amperage.
Final slope rate is the rate of amperage
change determined by the main amperage,
final slope time, and final amperage.
Operation:
1 Press and release initial switch within 3/4
second to start shielding gas flow. To
stop the preflow sequence before pre-
flow time elapses (25 seconds), press
and release final switch. The preflow tim-
er will reset and the weld sequence can
be started again.
�
If an initial switch closure is not made
again before preflow time ends, gas
flow stops, the timer resets, and an ini-
tial switch press and release is neces-
sary to start the weld sequence again.
2 Press initial switch to start arc at initial
amps. Holding switch will change amper-
age at initial slope rate (release switch to
weld at desired amperage level).
3 When main amperage level is reached,
initial switch can be released.
4 Press and hold the final switch to de-
crease amperage at final slope rate (re-
lease switch to weld
amperage level).
5 When final amperage has been reached,
the arc extinguishes and shielding gas
flows for the time set on the Postflow
control.
Application:
With the use of two remote switches instead
of potentiometers, 3T gives the operator the
ability to infinitely increase, decrease, or
pause and hold amperage within the range
determined by the initial, main, and final
amperages.
at desired