A-7

A-7

INSTALLATION

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When these parameters are identical, the pulsing fre- quency will be the same, helping to stabilize the arcs.

Every welding gun requires a separate shielding gas regulator for proper flow rate and shielding gas cover- age.

Do not attempt to supply shielding gas for two or more guns from only one regulator.

If an anti-spatter system is in use, each gun must have its own anti-spatter system. See Figure A.2.

ELECTRODE AND WORK CABLE CONNECTIONS

Connect a work lead of sufficient size and length (per Table A.1) between the proper output terminal on the power source and the work. Be sure the connection to the work makes tight metal-to-metal electrical contact. To avoid interference problems with other equipment and to achieve the best possible operation, route all cables directly to the work or wire feeder. Avoid exces- sive lengths and do not coil excess cable. Do not tight- ly bundle the electrode and work cables together.

Use K1796 coaxial welding cables wherever possible.

Minimum work and electrode cables sizes are as follows:

TABLE A.1

(Current (60% Duty Cycle)

MINIMUM COPPER

 

WORK CABLE SIZE AWG

 

Up To 100 Ft. Length (30 m)

 

 

 

400 Amps

2/0 (67 mm2)

500 Amps

3/0 (85 mm2)

600 Amps

3/0 (85 mm2)

When using an inverter type power source like the Power Wave, use the largest welding (electrode and ground) cables that are practical. At least 2/0 copper wire - even if the average output current would not nor- mally require it.

CAUTION

When pulsing, the pulse current can reach very high levels. Voltage drops can become excessive, leading to poor welding characteristics, if undersized welding cables are used.

Most welding applications run with the electrode being positive (+). For those applications, connect one end of the electrode cable to the positive (+) output terminal on the power source (located beneath the spring loaded output cover near the bottom of the case front). Connect the other end of the electrode cable to the wire drive feed plate using the stud, lockwasher, and nut provided on the wire drive feed plate. The electrode cable lug must be against the feed plate. Be sure the connection to the feed plate makes tight metal-to-metal electrical contact. The electrode cable should be sized according to the specifications given in Table A.1. Connect a work lead from the negative (-) power source output terminal to the work piece. The work piece connection must be firm and secure, especially if pulse welding is planned.

CAUTION

Excessive voltage drops caused by poor work piece connections often result in unsatisfactory welding per- formance.

When welding with the STT process, use the positive output connection labeled (STT) for STT welding. (If desired, other welding modes can be used on this ter- minal; however, their average output current will be lim- ited to 325 amps.) For non-STT processes, use the positive output connection labeled (Power Wave), so that the full output range of the machine is available.

CAUTION

Do not connect the STT and Power Wave terminals together. Paralleling the terminals will bypass STT cir- cuitry and severely deteriorate STT welding perfor- mance.

NEGATIVE ELECTRODE POLARITY

When negative electrode polarity is required, such as in some Innershield applications, reverse the output connections at the power source (electrode cable to the negative (-) terminal, and work cable to the positive

(+) terminal).

When operating with electrode polarity negative, the Dip switch 7 must be set to ON on the Wire Feed Head PC Board. The default setting of the switch is OFF to represent positive electrode polarity.

To set the Negative Polarity switch on Wire Feed Head PC board, refer to the section DIP SWITCH SETTINGS

AND LOCATIONS.

POWER WAVE 455M/MSTT

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Lincoln Electric SVM173-A service manual Electrode and Work Cable Connections, Negative Electrode Polarity

SVM173-A specifications

The Lincoln Electric SVM173-A is a highly regarded welding power supply that stands out for its advanced features, robust performance, and innovative technologies. This machine is specifically designed to meet the demands of both industrial and commercial welding applications, making it a versatile choice for professionals.

One of the main features of the SVM173-A is its high efficiency, which contributes to reduced energy costs and enhanced productivity. The device operates on a powerful DC output, ensuring stable and reliable arc performance. This is particularly beneficial when working with various materials, allowing for smooth and consistent welds.

The SVM173-A leverages Lincoln Electric's proprietary inverter technology. This innovation allows for a lighter weight and more compact design without compromising on power. The inverter technology also enables precise control of the welding parameters, which is critical for maintaining quality across different welding tasks. Additionally, the machine features a wide input voltage range, accommodating various power sources and enhancing its adaptability on job sites.

Another key characteristic of the SVM173-A is its user-friendly interface. The machine is equipped with an intuitive control panel that allows users to easily adjust settings, making it accessible for both novice and experienced welders. The digital display provides clear readouts of output parameters and error notifications, facilitating quick troubleshooting in the field.

Safety is paramount in welding operations, and the SVM173-A incorporates several protection features. These include overcurrent protection, overheating protection, and circuit protection, ensuring that the machine operates safely and efficiently under various conditions.

The SVM173-A also supports a wide range of welding processes, including MIG, TIG, and stick welding. This flexibility makes it an ideal choice for workshops that require a multi-process machine capable of handling diverse applications. Furthermore, the SVM173-A supports spool gun operation, which is particularly useful for aluminum welding, enhancing its versatility even further.

In summary, the Lincoln Electric SVM173-A is a powerful and adaptable welding machine that combines innovative technologies, user-friendly features, and robust safety mechanisms. Its high efficiency, precision control, and multi-process capabilities make it an excellent investment for professionals seeking reliable performance in demanding environments. Whether for heavy-duty industrial use or more specialized applications, the SVM173-A stands as a testament to Lincoln Electric's commitment to quality and innovation in welding solutions.