D-2

 

MAINTENANCE

D-2

 

 

 

 

SERVICE PROCEDURES

 

FIGURE C.1 SPARK GAP

Operation of the Precision TIG should be trouble-free for the life of the machine. Should a malfunction occur, however, the following procedures will be useful to trained service personnel with experience in repairing arc welding equipment:

.015 Spark Gap

COMPONENT ACCESS

The following components are accessible for routine set up and periodic service without requiring removal of the case sides or roof:

•Input Reconnect Panel (refer Section A) is located behind a removable panel on the rear of the left case side. Remove the two screws (with a screwdriver or a 3/8"/ 9.5mm hex driver) on the bottom corners of this panel to remove it.

•Control Box components and PC Boards (refer Section B-6) are located behind the front control panel. Remove the two screws (with a screwdriver or a 3/8"/ 9.5mm hex driver) on the top corners of this panel to swing it down.

•Hi-Freq. Spark Gap assembly (refer Spark Gap Adjustment) is located behind a removable panel on the rear of the right case side, under the torch box. Remove the screw (with a screwdriver or a 3/8"/ 9.5mm hex driver) on the bottom center of this panel to remove it.

SPARK GAP ADJUSTMENT

The spark gap is set at the factory to a gap of 0.015 inches (0.4 mm) See Figure C.1. This setting is ade- quate for most applications. Where less high frequen- cy is desired, the setting can be reduced to 0.008 inch- es (0.2 mm).

WARNING

Use extreme caution when working with circuit of the high frequency. The high voltages developed can be lethal. Turn the input power off using the disconnect switch or fuse box before working inside the machine. This is particularly important when working on the secondary circuit of the high voltage transformer (T3) because the output volt- age is dangerously high.

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Note: In highly dirty environments where there is an abundance of conductive contaminants, use a low pressure air stream or a firm piece of paper to clean out the spark gap. Do not disturb the factory gap set- ting.

To check the spark gap:

1.Turn the input power off per above.

2.Remove the access panel on the right case side (See Component Access).

3.Check the spark gap spacing with a feeler gauge.

If adjustment is required:

1.Adjust the gap by loosening the Allen head screw on one of the aluminum blocks, reset the gap and tighten the screw in the new position.

If spark gap is correct:

1. Reinstall the access panel on the right case side.

UNDER-COOLER SERVICE

The required maintenance and service instructions for the Under-Cooler are provided in the operator’s manu- al (IM723) provided with the Under-Cooler Cart.

PRECISION TIG 375

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Lincoln Electric IM909 manual Service Procedures, Component Access, Spark GAP Adjustment, UNDER-COOLER Service
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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.
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