Difference between revisions of "TIG Welder"

Revision as of 15:42, 6 May 2020

Miller 250 DX

The current Ace of the TIG Welder is Wyatt Bertis (wbertis22@georgefox.edu).

Description

Here is an example of TIG welding and some good basic information.

Documentation

Owner's Manual

Terminology

Squarewave technology was developed by Miller Electric in 1976 to improve your weld quality and make TIG (tungsten inert gas) welding easier. Miller Squarewave technology provides arc stability when welding aluminum, prevents arc rectification and eliminates tungsten erosion.

Balance control-The balance control is adjustable to provide additional oxide removal (more cleaning) or less cleaning based on the condition of the material being welded.

Syncro Start-This allows the choice of Soft, Standard or Hot TIG starts based on the application, lead lengths and tungsten size.

Digital welding meters-Display both amperage and voltage for viewing of the actual and preset values for greater accuracy and repeatability in your welding procedure.

Last procedure recall-Simplifies changing your Syncrowave back and forth from aluminum TIG to stainless TIG to Stick welding. One switch makes all the control panel changes.

Adaptive Hot Start-Stick welding features such as Adaptive Hot Start™ provide good arc strikes without sticking. Once welding, the DIG control makes dynamic adjustments to the welder to ensure smooth E7018 and deep penetration E6010.

Training

Operation

Demonstration

Demonstrate you can safely setup the saw and rip a board. You will then proceed to cross cut one of the remaining pieces. Remember to set the blade height so it is protruding less than 1/8" out the top of material for less exposure. When performing a rip cut the fence is used to guide the lumber into the blade. You want to make sure that the distance between the fence and blade is the width of desired cut. Mark the edge of the material when doing a cross cut so you can align the material with the blade in the sled. You can also use a miter gauge for making cross cuts but make sure the material is long enough and well supported.

General Procedure

Place the fume hood over the area you will be welding
Select electrode that is adequate for your application of material
Grind electrode to a point. (This gives a smaller and more directed arc)
Insert the electrode into the collet of the torch
Attach ground clamp to table (ensure ground contact surface is clean)
Ensure the adjusting screw on the tank regulator is loose (Do not unscrew all the way)
Open cylinder valve all the way
Turn the adjusting screw (clockwise) to increase flow to 15 CFH. The gas will only flow after the pedal is depressed and will stop after the post-flow time has been reached.
Identify material type, and thickness that is going to be welded
Refer to TIG welding chart for specified adjustments, specific to your application
Clean material to remove any oxidizing and or oil residue
Turn on the welder and adjust----------
Hold the electrode in your dominant hand (ensure it can move freely)
Hold electrode about an 1/8 inch away from the metal
Using the foot pedal to control the voltage, start off with the foot pedal half way down to start a puddle on the material.
Once a puddle is started let off the foot pedal to maintain a steady puddle without burning through the material.
Once the puddle is formed, dab the filler rod into the puddle
Moving along the material, walk the electrode back and forth across the puddle while dabbing the filler into the pool

Shutting down:

Close gas cylinder valve
Back out adjusting screw on regulator (Do Not unscrew all the way)
Turn off the welder
Remove ground clamp

Safety

Don't exceed gas pressure past specified value
Don't weld with gas off
Don't touch tip to welding surface
Don't weld in wet gear or standing water
Don't unscrew valve adjusting screw all the way out
Make sure ground clamp is connected to work

Certification

Foxtale Course

Troubleshooting

Maintenance

General maintenance

Keep the saw clean and use the dust collector. There are several lubrication points on the saw that need to be checked by the tech.

Specific Maintenance Tasks

Maintenance Procedure	Frequency	Done By
Lubricate mechanisms	Semester	Sample
Clean machine interior	Monthly	Tech
Change the blade	As Needed	Tech

@@ Line 61: / Line 61: @@
 # Ensure the adjusting screw on the tank regulator is loose (Do not unscrew all the way)
 # Open cylinder valve all the way
-# Turn the adjusting screw (clockwise) to increase pressure to 15 CFH.
+# Turn the adjusting screw (clockwise) to increase flow to 15 CFH.  The gas will only flow after the pedal is depressed and will stop after the post-flow time has been reached.
 # Identify material type, and thickness that is going to be welded
 # Refer to TIG welding chart for specified adjustments, specific to your application
@@ Line 67: / Line 67: @@
 # Turn on the welder and adjust----------
 # Hold the electrode in your dominant hand (ensure it can move freely)
-# Hold electrode about an inch away from the metal
+# Hold electrode about an 1/8 inch away from the metal
 # Using the foot pedal to control the voltage, start off with the foot pedal half way down to start a puddle on the material.
 # Once a puddle is started let off the foot pedal to maintain a steady puddle without burning through the material.
 # Once the puddle is formed, dab the filler rod into the puddle
 # Moving along the material, walk the electrode back and forth across the puddle while dabbing the filler into the pool
 # '''Shutting down:'''
-# Close gas cylinder valve
+*Close gas cylinder valve
-# Back out adjusting screw on regulator (Do Not unscrew all the way)
+*Back out adjusting screw on regulator (Do Not unscrew all the way)
-# Turn off the welder
+*Turn off the welder
-# Remove ground clamp
+*Remove ground clamp
 ==Safety==