INSTALLATION | ||
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VOLTAGE SENSING
The best arc performance occurs when the PowerWave AC/DC has accurate data about the arc conditions. Depending upon the process, inductance within the electrode and work lead cables can influ- ence the voltage apparent at the studs of the welder. Voltage sense leads improve the accuracy of the arc conditions and can have a dramatic effect on perfor- mance. Sense Lead Kits
CAUTION
If the voltage sensing is enabled but the sense leads are missing, improperly connected, or if the electrode polarity switch is improperly configured extremely high welding outputs may occur.
In extremely sensitive applications requiring volt- age sense leads, it may be necessary to route the control cable (67 lead) and the work voltage sense lead (21 lead) away from the electrode and work welding cables. For more information regarding the placement of voltage sense leads, see the sec- tion entitled "Welding with Multiple Independent Power Waves."
The ELECTRODE sense lead (67) is built into the K1795 control cable. The WORK sense lead (21) con- nects to the Power Wave at the
Enable the voltage sense leads as follows:
TABLE A.2
Process | Electrode Voltage | Work Voltage |
| Sensing 67 lead * | Sensing 21 lead |
GMAW | 67 lead required | 21 lead optional** |
67 lead required | 21 lead optional** | |
FCAW | 67 lead required | 21 lead optional** |
GTAW | Voltage sense at studs | Voltage sense at studs |
SAW | 67 lead required | 21 lead optional |
*The electrode voltage 67 sense lead is part of the control cable to the wire feeder.
**For consistent weld quality, work voltage sensing is recommended.
Work Voltage Sensing
The Power Waves are shipped from the factory with the work sense lead disabled.
To use work voltage sensing, connect the (21) work voltage sense lead from the Power Wave to the work. Attach the sense lead to the work as close to the weld as practical. Enable the work voltage sensing in the Power Wave as follows:
WARNING
ELECTRIC SHOCK can kill.
• 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.
1.Turn off power to the power source at the discon- nect switch.
2.Remove the front cover from the power source.
3.The control board is on the left side of the power source. Locate the
DIP switch and look for switch 8 of the |
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DIP switch. |
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4. Using a pencil or other small object, |
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slide the switch to the OFF position if |
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the work sense lead is NOT connected. |
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Conversely, slide the switch to the ON |
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position if the work sense lead is pre- |
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sent.
5.Replace the cover and screws. The PC board will (read) the switch at power up, and configure 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.