Dual Head / Dual Procedure with Memory

BB-13	OPERATION	BB-13

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Each procedure contains/stores the following information:

•Basic weld parameters as applicable - WFS, Volts, Trim, Amps

•Weld Mode - Mode Number

•Preflow/Postflow - Time in Seconds

•Run in - WFS Only (work point determined by next active sequence state)

•Start Parameters - Status, Slope Time, WFS, Volts, Trim, Amps

•Arc Control - Setpoint

•Crater Parameters - Status, Slope Time, WFS, Volts, Trim, Amps

•Burnback - Time in Seconds

•Limits - All applicable limits.

In general terms, dual procedure and memory are essen- tially independent storage locations for information. Procedures can be thought of as temporary or working storage locations because they contain the weld settings readily available for use, and when active, are easily mod- ified. The dual procedure feature allows the operator to switch between procedures (A and B) "on the fly" while welding. In addition to their procedure set-up functions, the procedure select push buttons serve as a means to manually select the active feed head (wire drive). Memory is more of a permanent storage location that cannot be accessed while welding. It contains one complete set of procedure information which can be recalled into the active procedure (A or B). Conversely, the active proce- dure can be saved into memory for safe keeping.

Dual Procedure / Head Select

This feature allows the user to select Procedure A, Gun (Remote Select), or Procedure B, as well as selecting the active feed head (wire drive). The active feed head is indi- cated by the procedure group (A, Gun, B) with the illumi- nated LED(s), and only one procedure group / feed head can be active at a time. Changing the active feed head can be done in one of two ways. Either remotely, by pulling the trigger of the inactive feed head, or locally by momentarily depressing the procedure select pushbutton of the inactive head.

When a procedure group / feed head is active, momen- tarily depressing the procedure select pushbutton will change from A to Gun, from Gun to B, or from B to A. The corresponding LED will be lit to let the user know which procedure is active. When the Gun position is selected, the Gun LED will be solid red, and the active procedure LED (A or B) will be flashing.

The active procedure is determined by the dual procedure (Gun) input located in the gun receptacle, or through the "Procedure Change with Trigger" feature if properly con- figured.

Note:

When in the Gun position, if no dual procedure (Gun) switch is plugged in, the Procedure defaults to A.

There are a total of four independent procedures avail- able on this panel. Two for each feed head.

Both the contents of the active procedure, and the active procedure itself (A to B, or B to A) can be changed "on the fly" during welding. Changing the active status of the feed head can only be done when the system is in the idle state. Procedure settings for each feed head, and active procedure information are saved at power down.

Memory

This feature allows the user to save and recall up to six individual procedures to/from a secured storage location. Each of the six memory locations is capable of storing a complete copy of the information associated with a single procedure (A or B) including its individual limits. See the complete list above.

Memories can be accessed at anytime, except when welding. For wire fed processes this means anytime a trigger is NOT activated. For CC processes it means any- time current is NOT flowing.

Saving to Memory

To save an individual procedure (A or B) to memory, first be sure the desired procedure of the desired feed head is active (its LED is on). Press and hold the button of the memory location you wish to store the procedure into. After 2 seconds, the LED above the memory button will begin to flash indicating that the procedure has been saved. The LED will continue to flash as long as the mem- ory button is depressed. When released the memory LED will stay on steady, and remain lit as long as the contents of the memory remain equal to the contents of the asso- ciated procedure.

If the memory button is released before the light begins to flash (t < 2s), a memory recall function will occur instead of a save function (i.e. the contents of the selected mem- ory will copied to the active procedure).

Note:

It is not required to load all 6 memories at once, nor is it necessary to load them in order.

Lincoln Electric SVM172-A Dual Head / Dual Procedure with Memory, BB-13, Saving to Memory

Models: SVM172-A

BB-13

OPERATION