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10 MS/STT PANEL (LARGE PANEL)
The MSP2 or MS/STT Panel provides a selection of numerous process specific and generic Power Source modes. In addition, it provides for the adjustment of the following parameters: preflow, run in, arc control, burnback, postflow and spot time. Only one parame- ter, as defined by the parameter indicator, may be dis- played and adjusted at a time.
The installation and operation of the MS/STT panel is identical to the MSP2 panel. The difference is that the MS/STT selects STT procedures and is only function- al when used with a Power Wave 455 STT Power Source.
Description:
Indicator Lights - Extra bright red LED for viewing at almost any angle. Always indicate the active parame- ter being displayed.
Display - Extra bright, 3 1/2 digit, .56” (14.2 mm) char- acter height, red LED display for viewing at almost any angle. Displays the value or status of the active parameter.
Parameter Ranges
WELD MODE - Adjustable per mode schedule. PREFLOW - 0.0 to 2.5 seconds (0.1 sec. increments). RUN IN - Low Range: 50 to 150 IPM (1.25 to 3.80 MPM).
-High Range: 75 to 150 IPM (2.00 to 3.80 MPM). ARC CONTROL - Trim
mode only).
Mode Schedule - Table on the front of the option used by the operator to correlate the displayed mode number to an actual Power Source mode.
Due to the nature of the system, the following feature is required for safety reasons: upon entering any con- stant current (CC) mode, the right encoder, labeled “Volts”, “Trim”, on the Display/Control Panel acts as a “soft” contactor switch. The encoder knob must be turned Clock Wise at least 45° to activate the output (turning Counter Clock Wise 45° deactivates the out- put). This prevents the output from inadvertently becoming “hot” when scrolling through the weld modes. The exception to this rule is when the weld mode is entered by a change in procedure (using a memory panel such as the
In the CC modes, the output current is set by the Amps control, and the Volts/Trim adjustment has no effect in this mode. In this mode, the Arc Control adjusts the arc force. Increasing the Arc Control set- ting increases the arc force, making the arc more harsh but less likely to stick. Decreasing the Arc Control setting decreases the arc force, making the arc softer and smoother.
Parameter Selection
The PARAMETER SELECT switch is a momentary large bat three position toggle switch that defaults to the center (off) position. Moving the switch bat up advances the parameter indicator in the upward direc- tion, down advances it in the downward direction. Holding the switch in either direction will result in the indicator advancing at a high rate of speed in that direction, until the switch is released. When the indica- tor reaches its upper or lower limit, advancing ceases until the direction of the switch is changed.
Parameter Adjustment
The value of the active parameter, as defined by the parameter indicator, is displayed on the parameter display. The PARAMETER SET switch is a momen- tary large bat three position toggle switch that defaults to the center (off) position. Moving the switch bat up advances the displayed value in the positive direction, down advances it in the negative direction. Holding the switch in either direction will result in the displayed value advancing at a high rate of speed in that direc- tion, until the switch is released. When the indicator reaches its upper or lower limit, advancing ceases until the direction of the switch is changed.
GMAW Pulse Procedures
In these procedures, the actual voltage greatly depends on the waveform used. The peak currents, background currents, rise times, fall times, and pulse times all affect the actual voltage. The actual voltage for a given wire feed speed is not directly predictable unless the waveform is known. In this case, it is not practical to preset an actual voltage for the procedure. Instead, an arc length adjustment is provided. The machine “knows” what the best arc length is at the given wire feed speed but allows the operator to change it.
The arc length trim (usually referred to simply as “trim”) can be adjusted between 0.500 and 1.500 on the Control Boxʼs Volts/Trim display. An Trim of 1.000 means that no adjustments will be made to the preset arc lengths. A Trim setting less than 1.000 decreases the preset arc lengths. The arc length trim adjustment is factored in at all wire feed speed settings. Increasing the Trim by 10 percent at a given wire feed speed also increases all the other arc length trim set- tings of the procedure by 10 percent.
POWER FEED 10