Lincoln Electric IM557 manual Display Control Keys, Preset voltage/trim may be adjusted

B-2 OPERATION B-2

Display Control Keys

The preset voltage/trim may be adjusted,

V VOLTS/ TRIM

RUN-IN

WFS

The function select, timer/crater select, arrow keys and rotational encoders all effect the display. Pressing the function select key will cause a function to be displayed. Pressing the timer/crater select key will cause a timer or crater feed speed to be displayed. Whichever is pressed last is the one that will be displayed since they cannot be displayed simultaneously. Only one function or timer indicator light can be on at one time and therefore it always indicates what is being displayed. The arrow keys allow you to adjust the Run-in speed timer or crater speed being dis- played. The encoder knobs allow rotational adjustment of weld wire feed speed and Arc Volts/Trim.

Note: If an indicator light is skipped, that parameter may not be enabled. Refer to section covering that parameter.

Function Select key enables oper- ator to choose which function will be displayed as indicated by the appropriate light. Pressing the key causes lights to sequence (top to bottom) starting from the current indicated position. If a timer or crater speed is being displayed when the Function Select key is pressed, then the indicator light of the last function selected before the timer/crater key was chosen will come on and become the starting point for the sequencing.

Adjusting either encoder knob automati- cally transfers display (and indicator light) to the function being adjusted (Volts/Trim or Wire Feed Speed).

using the Volts/Trim encoder knob. The syn- ergic preset voltage/trim level may be adjust- ed within the range synergically set by the power source for the process and weld Feed Speed being used. The power source auto- matically determines whether preset volt- age or percent trim will be displayed. Preset voltage is indicated by one digit only to the right of the decimal point, while per- cent trim always displays two digits to the right of the decimal point.

Middle Light - Indicates Run-In Speed Function has been selected and the Run-In speed setting is being displayed in IPM or m/m (see section for English or Metric dis- play).

As shipped these models are setup for minimum rated fixed Run-In speed with dis- play function deactivated. They may be user-selected to activate or deactivate adjustable Run-In display. (See section for selection of Run-In and resetting fixed Run- In speed).

Wire will be fed at the Run-In speed rate until arc current begins to flow. Once arc current flows, wire will be fed at the Weld speed rate. Decreasing Run-In speed below its lower limit (using the down arrow key) causes the display to read “- - -”. This indicates that the Run-In speed will be kept the same as the weld speed setting. You can reset a different Run-In speed simply by pressing the up arrow key.

The Run-In speed will also be the same as the weld speed setting if rapid restrike welding applications are used, where the arc is restruck in a fraction of a second after the previous welding arc was stopped.

Bottom Light - Indicates Weld Feed Speed (WFS) Function has been selected and the weld speed setting is being dis- played in IPM or m/m (see section for

Top Light - indicates Voltmeter Function has been selected and arc voltage (in volts) will be displayed along with electrode polarity when the trigger has been pressed. When the trigger is not pressed, this will serve as a preset voltage/trim function and the preset voltage/trim will be displayed. The top light “blinks” when arc voltage is being displayed and stays lit when preset volt- age/trim is displayed. The last welding voltage displayed before the weld is stopped, will continue to be displayed for 5 seconds after welding to permit

operator monitoring.

English or Metric speed display). The range of Weld Feed Speed is synergically set by the power source for the process being used, and is adjustable using the Wire Feed Speed encoder knob on the front of the Synergic 7 Control.

If selected (see Memory Ammeter Selection section), the bottom light will “blink” while welding, indicating that the dis- play has been selected to display welding amps. The last welding current displayed before the weld is stopped will continue to be displayed for 5 seconds after welding to permit operator monitoring.

SYNERGIC 7 & 7H