Miller Maxstar 400 Owner's Manual page 67

3T Specific Trigger Method
B.
Current (A)
*
A
Preflow
Initial Amps /Initial Slope
* 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.
1 3T (Specific Trigger Operation)
Sequencer is required to reconfigure for 3T.
3T requires a specific type of remote con-
trol with two independent momentary-
contact switches. One will be designated
initial switch, and it must be connected be-
tween 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.
2 Encoder Control
To select 3T, rotate Encoder control.
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.
OM-275857 Page 58
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A complete Parts List is available at www.MillerWelds.com
Remote Trigger Operation
*
*
*
B C
Main Amps
Operation
Press and release initial switch within 3/4
second to start shielding gas flow. To stop the
preflow sequence before preflow time
elapses (25 seconds), press and release fi-
nal switch. The preflow timer 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 initial
switch press and release is necessary to
start the weld sequence again.
Press initial switch to start arc at initial amps.
Holding switch will change amperage at initial
slope rate (release switch to weld at desired
amperage level).
When main amperage level is reached, initial
switch can be released.
Press and hold the final switch to decrease
amperage at final slope rate (release switch
to weld at desired amperage level).
When final amperage has been reached, the
arc extinguishes and shielding gas flows for
the time set on the Postflow control.
*
*
*
D
Final Slope /Final Amps Postflow
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 am-
perages.
E