OPERATION

 

B-5

 

B-5

 

 

FIGURE B.5

FIGURE B.6

Gun Handle

Gas Diffuser

Contact Tip

Contact Tip

Wire Electrode

Gas Nozzle

3/8"– 1/2"(10-13mm) Contact Tip to Work Distance(CTWD)

Shielding Gas

When using the GMAW process, a cylinder of shield- ing gas, must be obtained. Refer to the ACCES- SORIES section for more information about selecting gas cylinders for use with the SP-135 PLUS.

1.For CO2, open the cylinder very slowly. For argon- mixed gas, open cylinder valve slowly a fraction of a turn. When the cylinder pressure gauge pointer stops moving, open the valve fully.

2.If using a regulator with an adjustable flow meter, close the gun trigger and adjust the flow to give 15

– 20 cubic ft per hour (CFH) (7 – 10 I/min) [use 20 -– 25 CFH (10 – 12 I/min) when welding out of

position or in a drafty location for CO2]. For argon mixed gas, trigger to release gas pressure, and turn off the adjust the flow to give 25 – 30 CFH (12 – 14 I/min).

3.Keep the cylinder valve closed, except when using the SP-135 PLUS. When finished welding:

a) Close the cylinder valve to stop gas flow.

b) Depress the gun trigger briefly to release the pressure in the gas hose.

c) Turn off the SP-135 PLUS.

Making A Weld

1.See Recommended Processes And Equipment section for selection of welding wire and shielding gas and for range of metal thicknesses that can be welded.

2.See the Application Chart on the inside of wire feed section door for information on setting the SP-135 PLUS controls.

3.Set the Voltage (“V”) and Wire Speed (“olo’”) con- trols to the settings suggested for the welding wire and base metal thickness being used.

4.Check that the polarity is correct for the welding wire being used and that the gas supply, if required, is turned on.

5.When using Innershield electrode, remove the gas nozzle and install the gasless nozzle. This will improve visibility of the arc and protect the gas dif- fuser from weld spatter. Refer to the MAINTE- NANCE section for details on nozzle replacement.

6.Refer to Figure B.7. Connect work clamp to metal to be welded. Work clamp must make good elec- trical contact to the workpiece. The workpiece must also be grounded as stated in “Arc Welding Safety Precautions” in the beginning of this manu- al.

7.Position gun over joint. End of wire may be lightly touching the work.

8.Lower welding helmet, close gun trigger, and begin welding. Hold the gun so the contact tip to work distance is about 3/8 inch (10 mm).

FIGURE B.7

GUN CABLE

WORKPIECE

ARC

WORK CLAMP

SP-135 PLUS

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Lincoln Electric IM788 manual Shielding Gas, Making a Weld
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IM788 specifications

The Lincoln Electric IM788 is a cutting-edge industrial welding inverter known for its advanced features and technologies that enhance productivity and efficiency in various welding applications. This machine is specifically designed to cater to the demands of high-performance environments while maintaining reliability and ease of use.

One of the standout features of the IM788 is its multi-process capability. It offers MIG, TIG, and stick welding options, making it a versatile choice for welders who work with a diverse range of materials and thicknesses. This flexibility enables operators to switch processes seamlessly without compromising on performance, thereby increasing overall productivity.

The IM788 is equipped with Lincoln Electric's exclusive Synchronized Arc Control Technology, which optimizes the arc characteristic for different materials and welding conditions. This technology helps to achieve cleaner and more precise welds, minimizing the need for post-weld finishing. Additionally, the machine offers a broad range of voltage and amperage settings, allowing for fine-tuning based on specific project requirements.

Another significant attribute of the IM788 is its built-in intelligence. The machine incorporates advanced microprocessor control, which enhances user interface capabilities and allows for easy adjustments to welding parameters. The intuitive digital display provides real-time feedback on settings and performance, enabling operators to make informed decisions and adjustments as needed.

Durability is also a key characteristic of the Lincoln Electric IM788. Its hardened metal case ensures protection against harsh working conditions, while internal components are designed to withstand heavy usage. This robust construction not only extends the machine's lifespan but also maintains consistent performance even in demanding environments.

The IM788's compact design and lightweight construction make it portable and easy to transport, allowing welders to move it effortlessly between job sites. Coupled with its energy-efficient operation, this inverter contributes to lower operational costs, making it an economical investment for both small workshops and large industrial operations.

In summary, the Lincoln Electric IM788 stands out for its multi-process capabilities, advanced welding technologies, user-friendly interface, and robust design. These features make it an ideal choice for professionals seeking a reliable and efficient welding solution. Whether for fabrication shops, construction sites, or maintenance applications, the IM788 delivers exceptional performance and versatility, solidifying its position as a leading welding inverter in the market.
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