Lincoln Electric 7FH manual Control Features

Crater Fill - Provides crater feed speed adjustment (in 4-step trigger mode) independent of weld, cold feed, or run-in speeds.

Solid-State Overload Protection - No circuit breaker to reset. Front panel display indicates time remaining before automatic reset.

Gas Solenoid Valve - Complete with inlet fittings for easy installation of gas is standard on Synergic 7F models. Also available as an option (K659-1) a Gas Guard regulator for flow surge suppression.

English/Metric Speed Display - Provides front panel selection of speed display in units of IPM or M/M.

4-Roll Drive - Both models employ 4-Roll Drive, with 2 driven rolls, providing optimal feeding force for problem feeding situations, with low wire deformation for improved feeding of soft wires.

Control Features:

Microcomputer Based Control - Provides precise setting and display of all parameters and precision timing functions. Optimizes wire drive control for crisp acceleration and smooth response with precise repeatability. Allows synergic control of various welding processes by communicating information over a serial link to the compatible power source.

Display and Indicator Lights - Wide temperature range, long life, 3-1/2 digit 7-segment LED display with .56” (14.2mm) character height permits easy viewing even from long gun cable distances . Individual red indicator lights are high intensity LED’s for viewing at almost any angle.

Encoder Controls - Rotating encoders provide continuous knob control for setting both Wire Feed Speed and Volts/Trim procedures.

Keypad - Consists of 7 membrane keys with tactile- feel embossed domes. All keys are generously spaced to provide easy selection, even if wearing welding gloves.

2-Step or 4-Step Trigger Modes - Unit operates only when trigger is pressed in 2-Step mode (normal) operation. 4-Step Trigger Mode eliminates the need to hold the gun trigger closed while welding.

Both models have user selectable 4-step with crater fill, or as shipped, 4-step with current interlock.

Gas Preflow and Postflow Timers - Allows setting of shielding gas preflow time (0-2.5 seconds) before welding arc starts, and gas postflow time (0-9.9 seconds), after welding arc stops.

Crater Fill - Allows setting of crater fill WFS (when 4- step with crater fill trigger mode is selected), independent of weld, cold feed, and run-in speeds.

Spot Mode - Allows a single timed weld cycle each time the gun trigger is held closed. Duration (0.2-9.9 seconds) is set by the Spot ON timer.

Digital “Memory” Voltmeter - Displays arc voltage from 0 to 80V DC, when welding gun trigger is activated, with automatic polarity indication for positive or negative electrode. The last welding voltage monitored at end of weld is displayed for 5 seconds after weld has stopped. This allows checking actual voltage after weld has stopped.

Power-down Save - All settings, including mode, Run-in speed, cold feed speed, crater speed, weld speed, timers, English-Metric units and acceleration are automatically saved when power is removed. This feature does not require batteries and when power is restored it will automatically return all settings to the state they were in when power was removed . However, the power source may overwrite any or all of these parameters after Power - Up Recall is complete.

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