Lincoln Electric SVM175-A service manual Wire Feeder Voltmeter Switch, Digital Output Meters

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B-5	OPERATION	B-5
		CV-WIRE mode: In this mode, turning the ARC CONTROL
	• When the electrode touches the work or power is
	drawn for lights or tools (approximately 100 Watts	clock wise from –10 (soft) to +10 (crisp) changes the arc
	minimum), the engine accelerates and operates at	from soft and washed-in to crisp and narrow. It acts as an
	full speed.	inductance/pinch control. The proper setting depends on the
	• When welding ceases or the AC power load is	procedure and operator preference. Start with a setting of 0.
	turned off, a fixed time delay of approximately 12	12. 14-PIN AMPHENOL: Primarily used for attaching
	seconds starts. If the welding or AC power load is
	not restarted before the end of the time delay, the	accessories, such as a wire feeder, spool gun module or
	idler reduces the engine speed to low idle speed.	TIG module. It provides connections to both 120VAC and
	• The engine will automatically return to high idle	42VAC power, and to the weld circuit work voltage sensing
	speed when there is welding load or AC power load	lead. It also provides a connection to the same control cir-
	reapplied.	cuits described in the 6-PIN AMPHENOL section below.
WELDING CONTROLS		remote control device, such as the K857, or a TIG Amptrol,
9. OUTPUT CONTROL: The output control dial is used		13. 6-PIN AMPHENOL- Primarily used to connect a
		such as the K870 or K812.
	to present the output voltage or current as displayed on	Both the 6 and 14-Pin amphenols are connected to a
	the digital meters for each of the four welding modes. It	remote control auto-sensing circuit that transfers all or par-
	can also be used to vary the output while welding. This	tial output control functions from the front panel output con-
	control is disabled by an auto-sensing circuit if the	trol dial to the remote output control device.
	machine is in CC-Stick, Downhill pipe, or CV-wire modes,	When in TOUCH START TIG mode, a remote output con-
	and an accessory device with output control capability is	trol device will vary the output from MIN up to the value set
	plugged into either amphenol.	with the front panel output control dial. In all other modes,
When in Touch-Start TIG mode, and when an accessory		the front panel output control is completely disabled, and
device with output control, such as an Amptrol, is plugged		full MIN to MAX control is transferred to the remote output
in to either Amphenol, the OUTPUT control dial is used to		control device.
set the maximum current range of the accessory output		Both Amphenols also connect to an electronic output con-
control device.		tactor circuit. When the “Weld Terminals” switch is in the
10. WELD MODE SELECTOR SWITCH: This switch		“remotely controlled” position, the weld terminals are
		switched on an doff by the device connected to either
	provides four selectable welding modes:	amphenol.
	- CV-WIRE
	- DOWNHILL PIPE	NOTE: Both the 6 pin and 14 pin Amphenols share the same
	- CC-STICK
	- TOUCH STARTING	output control auto-sensing and contactor circuitry; for
		this reason, there can only be one device plugged into
11. ARC CONTROL- The ARC CONTROL dial is active		the Ranger 305D at any time.
	in the CV-WIRE, CC-STICK, and DOWNHILL PIPE	14. WELD TERMINALS CONTROL SWITCH- In the
	modes, and has different functions in these modes. This
	control is not active in the TOUCH START TIG mode.	WELD TERMINALS ON position, the output is electrically
	CC-STICK mode: In this mode, the ARC CONTROL dial	hot all the time. In the REMOTELY CONTROLLED posi-
	sets the short circuit current (arc-force) during stick weld-	tion, the output is controlled by a wire feeder or amptrol
	ing to adjust for a soft or crisp arc. Increasing the dial from	device, and is electrically off until a remote switch is
	–10 (soft) to +10 (crisp) increases the short circuit current	closed.
	and prevents sticking of the electrode to the plate while	15. WIRE FEEDER VOLTMETER SWITCH:
	welding. This can also increase spatter. It is recommend-
	ed that the ARC CONTROL be set to the minimum num-	Matches the polarity of the wire feeder voltmeter to
	ber without electrode sticking. Start with a setting at 0.	the polarity of the electrode.
	DOWNHILL PIPE mode: In this mode, the ARC CON-	16. DIGITAL OUTPUT METERS:
	TROL dial sets the short circuit current (arc-force) during	The digital meters allow the output voltage (“CV-
	stick welding to adjust for a soft or a more forceful digging	WIRE” mode) or current (“CC-STICK”, “DOWNHILL
	arc (crisp). Increasing the number from –10 (soft) to +10	PIPE” and “TOUCH START TIG” modes) to be preset
	(crisp) increases the short circuit current which results in a	prior to welding using the output control dial. When
	more forceful digging arc. Typically a forceful digging arc	pre-setting voltage the AMPS display will be off and
	is preferred for root and hot passes. A softer arc is pre-	while pre-setting amps, the VOLTS display will be off.
	ferred for fill and cap passes where weld puddle control	While welding, the machine display both the actual
	and deposition ("stacking" of iron) are key to fast travel	voltage (VOLTS) and current (AMPS).
	speeds. It is recommended that the ARC CONTROL be
	set initially at 0.

RANGER 305D