B-11

OPERATION

B-11

 

 

 

The new foot pedal provides such independent action distinction of precisely where the arc start switch actu- ates without over-riding minimum control pedal posi- tion, and precisely where the control pedal has been returned to minimum position without inadvertently de- actuating the arc start switch. The result is repeatable consistency in TIG weld starting and crater-fill for man- ual process control.

Using this new foot pedal with the Precision TIG’s new presettable Minimum Output level, in addition to the presettable Maximum Output level, further enhances the starting and crater level consistency as well as the control resolution of the manually controlled foot pedal.

FIGURE B.5

Foot

Rock Toe

Control Pressure

Switch

 

Adjustable

 

 

 

 

 

 

or

 

 

 

 

 

 

 

 

 

 

Removable

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Heel Stop

Fully Pressed

 

 

 

 

 

 

 

Maximum Output

Control Pedal

 

 

 

 

 

 

 

Machine Setting

At-Rest

 

 

 

Minimum Output

Control Pedal

 

 

Machine Setting

 

 

 

 

 

 

 

 

 

Off

 

 

Tim

e

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pressed

At-Rest

 

 

Switch Pedal

Switch Pedal

 

 

 

 

Setup for TIG Amptrol Welding

FIGURE B.6

AC Balance

AUTO

or

Set:

Standard Controls

Power Switch

ON

Mode Switch

TIG

Polarity Switch

AC or DC-

More + for alum.oxide "Cleaning" w/o"Spitting" or "wetting"loss.

Balanced for equal + and - current. More - for higher "Penetration".

Min. to Max. Amptrol

Max. to Min.

Amptrol

Pulse Frequency

4-6 pps is a typical initial setting.

Set for bead shape and travel speed: Higher for thinner plate and faster travel. Lower for thicker plate and slower travel.

% On Time

40-60%is a typical initial setting.

Set for total heat of Peak current:

Lower reduces distortion and burn-thru.

Background Current

40-60%is a typical initial setting.

Set as low as will maintain a pulse arc (Will not drop below Min.Output setting.)

Local/Remote

Switch

REMOTE

Maximum Output

Set to desired max. Amptrol output level.

Minimum Output

Press Display switch

and Set to desired min. Amptrol (Start/Crater) output level.

Postflow

Set as low as required.

Higher for larger

tungsten and current.

Advanced Panel

Controls

Trigger Switch

2-STEP

Pulse Switch

ON or OFF

Downslope

ZERO

For no arc-out delay.

PRECISION TIG 275

Page 25 Page 27
Page 26
Image 26
Lincoln Electric IM702-A manual Figure B.5
Page 25 Page 27

IM702-A specifications

The Lincoln Electric IM702-A is a versatile and innovative welding machine that has garnered attention for its advanced features and robust performance. Designed for various welding applications, the IM702-A is a go-to choice for professionals in the industry, offering precision, reliability, and ease of use.

One of the standout characteristics of the IM702-A is its advanced inverter technology. This allows for a lightweight and compact design, making it easier to maneuver in tight spaces compared to traditional welding machines. The inverter technology also contributes to energy efficiency, reducing power consumption without compromising on performance.

The IM702-A features a multi-process capability, enabling it to perform MIG, TIG, and Stick welding with ease. This versatility makes it ideal for a wide range of projects, from industrial manufacturing to home repairs. Users can seamlessly switch between different welding processes, enhancing productivity and streamlining workflow.

In terms of user interface, the Lincoln Electric IM702-A is designed with convenience in mind. It boasts a digital display that provides real-time information on welding parameters, making it easier for operators to monitor and adjust settings as needed. The intuitive controls are user-friendly, allowing even novice welders to achieve professional-quality results.

The machine also includes advanced weld control features, such as precise amperage and voltage adjustments. These controls ensure that users can achieve optimal settings for different materials and thicknesses, resulting in clean, strong welds. Additionally, the IM702-A is equipped with an automatic voltage adjustment feature, which helps maintain consistent performance under varying input conditions.

Durability is another key selling point for the IM702-A. Built with high-quality materials and engineering, this welding machine is designed to withstand the rigors of daily use in demanding environments. Its rugged construction provides reliability and longevity, ensuring that it remains a valuable asset in any workshop.

Lastly, safety is a priority in the design of the IM702-A. It includes several built-in safety features, such as thermal overload protection and a stabilized arc performance that reduces the risk of arc blow, protecting both the operator and the equipment.

Overall, the Lincoln Electric IM702-A stands out in the welding market due to its advanced technologies, multi-process capabilities, user-friendly interface, and robust safety features, making it an excellent choice for professional welders seeking high-quality performance and versatility.
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