Miller HF-251-2 User Manual

HF-251D-1 And HF-251-2
Processes
Description
TIG (GTAW) Welding
OM-611 096 556M
April 2001
High Frequency Arc Starter
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Miller HF-251-2 Specifications

General

Brand	Miller
Model	HF-251-2
Category	Welding System
Language	English

Summary

Section 1 - Safety Precautions

1-2. Arc Welding Hazards

Details potential hazards associated with arc welding processes and equipment, emphasizing vigilance.

Section 2 - Installation

2-3. Installing Gas Supply

2-7. Connecting To Weld Output Terminals

Guides on how to properly connect cables to the weld output terminals for safe operation.

2-8. Connecting Input Power

Provides instructions for connecting the equipment to the input power supply.

Section 3 - Operation

3-1. Controls

3-2. High Frequency Switch

Describes the high frequency switch settings and their operational impact.

3-3. High Frequency Selector Switch

Explains how to select the high frequency mode for panel or remote operation.

3-4. High Frequency Intensity Control

Details how to adjust the intensity of the high frequency output for optimal welding.

Section 4 – Maintenance & Troubleshooting

4-1. Routine Maintenance

4-2. Adjusting Spark Gaps

Provides instructions for adjusting the spark gaps for proper high frequency operation.

4-3. Troubleshooting

Offers solutions for common problems encountered during equipment operation.

Section 6 – High Frequency

6-1. Welding Processes Requiring High Frequency

6-3. Correct Installation

Shows proper installation procedures to minimize high frequency interference.

Section 7 – Selecting and Preparing Tungsten Electrode

7-1. Selecting Tungsten Electrode

Provides guidance on selecting the appropriate tungsten electrode based on amperage and polarity.

7-2. Preparing Tungsten For AC Or DC Electrode Positive (DCEP) Welding

Details the preparation method for tungsten electrodes used in AC or DCEP welding.

7-3. Preparing Tungsten For DC Electrode Negative (DCEN) Welding

Section 8 – Guidelines For TIG Welding (GTAW)

8-1. Positioining The Torch

8-2. Torch Movement During Welding

8-3. Positioning Torch Tungsten For Various Weld Joints