OPERATION | ||
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INTERNAL SET UP CONTROLS
Precision TIG 275 models which have an Advanced Panel
Access to this internal panel is obtained by removing the two screws securing the top corners of the Precision TIG front control panel and swinging the con- trol panel down to reveal the panel mounted on the sur- face of the Precision TIG Control board:
CAUTION
•THE CONTROL BOARDS CONTAIN STATIC SEN- SITIVE COMPONENTS
•To avoid possible damage to these components
be sure to ground yourself by touching the machine’s sheet metal while handling or making settings on the internal control box components.
PRECISION TIG ADVANCED PANEL
(Internal Panel)
^ ON |
1 2 3 4 5 6 7 |
DIP SWITCH (S1)
HOT START | F | |
ARC FORCE | ||
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ON
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
OFF
DIP SWITCH POSITIONS (FACTORY SETTINGS)
STICK WELDING FEATURES
The following DIP switch feature selections function only when the Precision TIG is set to Stick mode. (See Item 3):
•Switch #6 Hot Start Level – Provides an extra out- put "boost" pulse at the arc strike to enhance arc starting. This is factory set for a level (about 50% extra) which is usually good for most stick welding applications
ON – Hot Start level is used (as shipped). OFF – No Hot Start.
•Switch #7 Arc Force Level – Prevents "stubbing" of the electrode by providing extra output current if the arc voltage drops below the level required to sustain the welding arc. High (+65%) and Low (+12%) factory set levels are selectable which are good for most stick welding applications.
ON – Higher for a "crisper" arc, often desired for 6010 type electrodes.
OFF – Lower Arc Force (as shipped) for a "softer" arc with 7018 or general type electrodes.
• Switch #8 (NOT CURRENTLY FUNCTIONAL)
TIG WELDING FEATURES
The following DIP switch feature selections function only when the Precision TIG is set to TIG mode (See Item 3):
•Switch #1 Preflow/Postflow Time Extension* (See Item 9)
ON – Doubles the time ranges.
OFF – Standard time ranges (as shipped).
•Switch #2
ON – Restart Enabled (as shipped).
OFF – Restart Disabled.
•Switch #3
ON – Restart Enabled.
OFF – Restart Disabled (as shipped)
•Switch #4 (NOT CURRENTLY FUNCTIONAL)
•Switch #5
ON - Level is minimum rating of the machine (2A) OFF – Level (as shipped) is Minimum Output setting
(same as Start level).
*The Preflow/Postflow Time doubling feature can also be selected on Precision TIG 275 models without the Advanced Panel by accessing the Control board in the control box per above instruc- tions, then disconnecting the jumper terminals attached to the jumper plug connected to receptacle J3 of the Control board. (Refer to Machine Wiring Diagram.)