Lincoln Electric IM708 manual Lower Case Front

B-3 OPERATION B-3

•The Arc Control regulates the relative Slope of the process. Slope dynamically controls the force the arc has to penetrate an open root. At the minimum setting, Arc Control is very soft and is similar to the Stick Soft mode. At the maximum setting, the slope is reduced, the OCV is reduced, and the operator has full control off the arc force required to pene- trate an open root joint. For vertical down, open root pipe welding applications, the recommended setting is between 8 and 10.

•During welding, a boost circuit increases the avail- able voltage to minimize pop outs. The boost circuit is independent of the OCV and only operates when an arc is lit.

TIG GTAW: The TIG mode features continuous con- trol from 5 to 425 amps. The TIG mode can be run in either the TIG touch start or high frequency assisted start mode.

•The Hot Start control selects the starting mode desired. A setting of less than 5, the TIG lift start mode is selected. The OCV is controlled below 10v and the short circuit "TIG touch" current is main- tained at 25 amps independent of the preset current. When the tungsten is lifted, an arc is initiated and the output is regulated at the preset value. Hot start set- tings between 0 and 5 regulate the arc initiation cur- rent. A setting of 5 results in the most positive arc ini- tiation. A setting of 0 reduces hot start.

•Hot Start settings between 5 and 10, select high fre- quency assisted starting TIG mode. In this range, the OCV of the machine is controlled between 50 and 70 volts. If using the Lincoln K930-1 TIG Module, set the Hot start to 10 for maximum OCV.

•The Arc Control is not used in the TIG mode.

CV-WIRE:The CV-WIRE mode features continuous control from 10 to 45 volts. The mode was intended for most GMAW, FCAW, and MCAW applications.

•The Hot Start control is not used in the CV-WIRE mode.

•The Arc Control regulates pinch effect. At the mini- mum setting (-10), minimizes pinch and results in a soft arc. Low pinch settings are preferable for weld- ing with gas mixes containing mostly inert gases. At the maximum setting (+10), maximizes pinch effect and results in a crisp arc. High pinch settings are preferable for welding FCAW and GMAW with CO2.

CV-INNERSHIELD:The CV-INNERSHIELD mode features continuous control from 10 to 45 volts. This mode was designed for self-shielded flux cored wires that require tight voltage control.

•The Hot Start control is not used in the CV-FLUX CORED mode.

•The Arc Control regulates pinch effect. At the mini- mum setting (-10), minimizes pinch and results in a soft arc. At the maximum setting (+10), maximizes pinch effect and results in a crisp arc. Most self- shielded wires work well at an Arc Control setting of 5.

8.HOT START and ARC CONTROL features have different functions depending on the welding Mode that is active. Each feature is described under the welding mode heading. (See Item 6 for specified

Mode Operation)

LOWER CASE FRONT

The output studs, line switch and remote connector are located on the lower case front.

9. Both STUDS contain "Twist-Mate" connector inserts.

•The Negative stud is configured to accept the pass through gas system.

10. The ON-OFF switch is a 3-phase circuit breaker rated at 100 amps per leg.

11.The METER POLARITY switch is located above the output connectors. The switch provides a work connection for wire feeder voltmeters. Place the switch in the position of the electrode polarity indi- cated by the decal. The switch does not change the welding polarity.

12.6-PIN AMPENOL for remote control.

REMOTE CONTROL of the OUTPUT CON- TROL and WELD TERMINALS

The Invertec V350-PRO (CE) has auto sensing of remote output controls.If after connecting or removing a remote, the Invertec V350-PRO (CE) did not config- ured the way you would like the local or remote con- trol settings can be changed by pushing the OUTPUT CONTROL or WELD TERMINAL button. (A user can- not select between the 6 and 14 pin amphenols.)

CV modes

•The remote will default to the 14-pin amphenol remote if a remote is connected to either of the 14- pin amphenols and the 6-pin amphenol. Note: Only one of the 14-pin amphenols can have a remote control connected at a time. If no remote is connect- ed to either of the 14-pin amphenols then the remote will default to the 6-pin amphenol if a remote is connected to it.

•If a remote control is connected or is not connect- ed to any of the amphenols the WELD TERMINAL control will default to REMOTE.

V350-PRO (CE)