Figure B.5

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.

Foot

Rock Toe

Control Pressure

Switch

Adjustable

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
			Switch Pedal

Setup for TIG Amptrol Welding

FIGURE B.6

AC Balance

AUTO

Set:

Standard Controls

Power Switch

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 375

IM909 specifications

Lincoln Electric IM909 is an innovative industrial multi-process inverter welder designed to provide exceptional flexibility, performance, and user-friendly operation for a wide range of welding applications. This versatile machine is suitable for both novice and experienced welders, making it an ideal choice for workshops, fabrication shops, and maintenance operations.

At the core of the IM909 is its multi-process capability, allowing users to perform MIG, TIG, and stick welding operations. This means that a single machine can cater to various welding needs, from thin sheet metal to heavy structural projects, providing great versatility in welding materials like steel, stainless steel, and aluminum. The IM909 is designed to meet the demands of today’s welding professionals, enabling seamless transitions between different welding processes without sacrificing performance.

One of the standout features of the IM909 is its advanced inverter technology. The inverter design not only makes the welder compact and lightweight but also enhances energy efficiency and improves arc stability. This results in better control over the welding process, leading to higher quality welds with reduced spatter. Additionally, the IM909 boasts a wide output range, allowing it to handle various welding thicknesses effectively.

Another significant characteristic of the IM909 is its user-friendly interface. The machine comes equipped with a digital display that provides clear readouts of current settings, making it easy for users to monitor and adjust parameters on the fly. Moreover, the intuitive controls simplify the setup process, streamlining operations for users of all experience levels.

Safety is always a top priority in welding operations, and the IM909 integrates several protective features, including over-temperature protection and circuit breaker safeguards. These elements ensure the durability of the machine and protect both the welder and the equipment from potential hazards.

In conclusion, the Lincoln Electric IM909 multi-process inverter welder stands out as a reliable, efficient, and adaptable welding solution. Its combination of advanced inverter technology, multi-process capabilities, user-friendly operation, and safety features makes it an excellent investment for any welding professional looking for quality and versatility in their equipment. Whether performing intricate fabrication work or tackling heavy-duty welding tasks, the IM909 delivers exceptional performance across a wide range of applications.

Lincoln Electric IM909 manual Figure B.5

Models: IM909

OPERATION

FIGURE B.5