Lincoln Electric IM746 manual Table A.1, Work Voltage Sensing, Electrode Voltage Sensing

A-4 INSTALLATION A-4

Enable the voltage sense leads as follows:

TABLE A.1

Process	Electrode Voltage	Work Voltage
	Sensing 67 lead *	Sensing 21 lead
GMAW	67 lead required	21 lead optional
GMAW-P	67 lead required	21 lead optional
FCAW	67 lead required	21 lead optional
GTAW	Voltage sense at studs	Voltage sense at studs
SMAW	Voltage sense at studs	Voltage sense at studs
SAW	67 lead required	21 lead optional
CAC-C	Voltage sense at studs	Voltage sense at studs

*The electrode voltage 67 sense lead is integral to the control cable to the wire feeder.

Work Voltage Sensing

The standard POWER WAVE 405’s default to the work stud (work sense lead disabled)

For processes requiring work voltage sensing, con- nect the (21) work voltage sense lead (K940) from the Power Wave work sense lead receptacle to the work piece. Attach the sense lead to the work piece as close to the weld as practical, but not in the return cur- rent path of the electrode to the ground clamp. Enable the work voltage sensing in the Power Wave as fol- lows:

WARNING

• Do not touch electrically live parts or electrodes with your skin or wet clothing.

•Insulate yourself from the work and ground.

•Always wear dry insulating gloves.

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1.Turn off power to the power source at the discon- nect switch.

2.Remove the wrap around cover from the power source.

3.The control board is on the center assembly facing the case front. Locate the 8-position DIP switch and look for switch 8 of the DIP switch.

4.Using a pencil or other small object, slide the switch to the OFF position if the work sense lead is NOT connected. Conversely, slide the switch to the ON position if the work sense lead is present.

O

N

1 2 3 4 5 6 7 8

5.Replace the wrap around and screws. The PC board will “read” the switch at power up, and config- ure the work voltage sense lead appropriately.

ELECTRODE VOLTAGE SENSING

Enabling or disabling electrode voltage sensing is automatically configured through software. The 67 electrode sense lead is internal to the cable to the wire feeder and always connected when a wire feeder is present.

CAUTION

Important: The electrode polarity must be config- ured at the feed head for all semi-automatic processes. Failure to do so may result in extreme- ly high welding outputs.

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POWER WAVE TO SEMI-AUTOMATIC POWERFEED WIRE FEEDER INTERCON- NECTIONS

The POWER WAVE 405 and semi-automatic PowerFeed family communicate via a 5 conductor control cable (K1543). The control cable consists of two power leads, one twisted pair for digital communi- cation, and one lead for voltage sensing. The cables are designed to be connected end to end for ease of extension. The output receptacle on the POWER WAVE 405 is on the case front. The input receptacle on the Power Feed is typically located at the back of the feeder, or on the bottom of the user interface.

Due to the flexibility of the platform the configuration may vary. The following is a general description of the system. For specific configuration information, consult the semi-automatic Power Feed instruction manual.

POWER WAVE 405