Category:TIG Welders and Independent Class: Figure Drawing: Difference between pages

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[[Category:Tools]][[Category:Welders]]
===Every Monday, 6:30 - 9:30 pm, Artisans Asylum, 96 Holton St Allston===
Link to: [[:Category:Metal Shop | Metal Shop main page]]


{{:Class_Figure_Drawing_Current_Registration}}


{{Warning|text='''Extra precaution required for welders.''' Training / Tool Testing is essential. See [https://www.dropbox.com/scl/fi/vxp99od0h481geq45avrp/Welding-Safety.pdf?rlkey=gv6csj0p7o5n3c341w58v78vl&dl=0 Welding Safety] doc.}}
'''Class Description'''


{{EyeWarning}}
This is a weekly open studio class where people of all artistic levels are invited to explore the human form through drawing and painting from a live nude model. It's a great way to sharpen up skills that have become rusty during the pandemic or to practice something new. The instructor is there to offer advice or to give more detailed instructions if you want them.


{{ToolBox|tool_title=TIG Welders|image=metal_shop_TIG_welder_nolabels.png|caption=TIG welder in
Each session starts out with fast "gesture" poses up to the first break, and then the poses get longer so you can focus on the details. There is no set progression from one class to the next. You can jump in any time.
the Metal Shop (Everlast 250 EX)|location=Metal Shop|training=[https://www.artisansasylum.com/class-
catalog Tool classes]|testing=[https://www.artisansasylum.com/tool-testing Tool
testing], or [[:Category:Metal Shop#Tool Testing Night|come to the shop on Tool
Testing Night]]|restrictions=red|make=Various|model=Various|serial=Unknown|
manufacturer_specs=n/a|manual=[[Category:TIG_Welders#Operation Notes]]|rubric=n/a|
tool_categories=}}


==Description==
{| class="infobox" cellspacing="5" style="width: 12em; text-align: left; font-size: 100%; line-height: 1.5em;"
 
! colspan="2" class="infobox-image" | [[File:sarah_20230301.jpg|220px|Sarah Miller model pic]]
The abbreviation T-I-G stands for '''T'''ungsten '''I'''nert '''G'''as.  TIG welders are a variety of arc welder.
|-
 
| colspan="2" | Life drawing from a model
In an arc welder, a strong electric current is passed between an electrode and the workpiece.  A conductive plasma forms in the gap between the two electrodes, reaching a temperature around 15,000 Kelvin (~25,000 F)
|-
 
|}
In a TIG welder the electrode is a rod of tungsten (element 74) very often alloyed with thorium (element 90.)  This material resists extremely high temperatures.  To prevent the electrode and the workpiece from burning, they are protected by a shield of argon, which is an inert gas.
{| class="infobox" cellspacing="5" style="width: 12em; text-align: left; font-size: 100%; line-height: 1.5em;"
 
! colspan="2" class="infobox-image" | [[File:fig_dwg_naia.jpg|300px|Dwg class pic naia]]
In a TIG welder the electrode is contained in a torch with gas supply that is held by hand. Filler metal (if needed) is added as a rod with the other hand.  The metal shop supplies a variety of welding rods: Mild steel in sizes ranging from 1/32" up to 1/8"; aluminum, and bronze or brass for brazing.  Other materials such as titanium rod must be supplied by the user.
 
The plasma in the arc is an intense source of light, including ultraviolet radiation.  The user must wear specialized protective gear to avoid eye damage and radiation burns.
 
==Tools in this category are:==
 
[https://wiki.artisansasylum.com/wiki/Everlast_Power_TIG_200DV_TIG_Welder Everlast_Power_TIG_200DV_TIG_Welder "Artemis"] Link to: [https://drive.google.com/file/d/13Jkc7Ye9_a6WHaaFbaToUt9ko2UGP0Lv/view?usp=drive_link TIG 200DV Manual]
 
[https://wiki.artisansasylum.com/wiki/Everlast_Power_TIG_250EX_TIG_Welder Everlast_Power_TIG_250EX_TIG_Welder "Athena"] Link to: [https://drive.google.com/file/d/1xQA9Iqqm45rfG4BD2cN5b5ezIWicYxtQ/view?usp=drive_link 250EX Manual]
 
[https://wiki.artisansasylum.com/wiki/Square_Wave_TIG_175_Pro_TIG_Welder Lincoln Electric Square Wave TIG 175 Pro] Link to: [https://drive.google.com/file/d/1FnM4Hc6KAvR8e_cYMpZThZ90LaucveyI/view?usp=drive_link Square Wave 175 Pro Manual]
 
[https://wiki.artisansasylum.com/wiki/Synchrowave_200_TIG_Welder Miller Syncrowave 200] Link to: [https://drive.google.com/file/d/1xvyn7y0exuV-A-n6i5LjVQ48Nj77KT52/view?usp=drive_link Synchrowave 200 Manual]
 
==Use for:==
 
* Most metals: Steel, stainless, aluminum, titanium, etc.
 
*  '''The shop provides consumables for mild steel''' (filler wire, 2% thoriated tungsten). Users provide consumables for other metals.
 
* See corresponding manufacture manual for each welder’s stick welding capabilities.
 
==Do Not Use for:==
 
* Galvanized, plated, painted, oiled, rusted, or powder coated metals.
 
== Safety Hazards ==
 
{| class="infobox" cellspacing="0" style="width: 2em; text-align: left; font-size: 125%; line-height: 1.5em;"
! colspan="2" class="infobox-image" | [[File:Helmet_gloves.png|60px| ]]
|-
|-
| colspan="2" |   
| colspan="2" |  Regular drawing practice in a happy supportive community
|-
|-
|}
|}
 
{| class="infobox" cellspacing="5" style="width: 12em; text-align: left; font-size: 100%; line-height: 1.5em;"
1.  '''UV damage to eyes.''' Welding Helmet with shade 10 protection or darker is required.  Darker for heavier applications.
! colspan="2" class="infobox-image" | [[File:Karina_lily_20230529.png|190px|Karina lily]]
 
2.  '''UV burns on exposed skin.''' The rays from the arc can cause severe radiation burn (worse than sunburn.) Cover exposed skin.
 
3.  '''Burns''' from flame, sparks, hot workpieces. Wear welding gloves, cotton clothing (no synthetics) and closed toe shoes.
 
4.  '''Poisoning''' from breathing gases produced by welding. Use ventilation. ''Do not stick head in fumes.''  Respirator recommended.
 
5.  Keep workplace '''clear of flammable materials''' including grease, oil, solvents, paper.
 
6.  '''Electrocution''' if welder is mishandled. Do not weld near puddles of water on floor or work area, especially when using AC output.
 
'''* Various safety links to keep you awake at night:'''
 
[https://www.ccohs.ca/oshanswers/safety_haz/welding/fumes.html Welding Fumes]
 
[https://drive.google.com/file/d/1JhZD70dLc5An9kkOP-_mw2djQo7XmOMj/view?usp=drive_link Metal Fume Fever]
 
[https://drive.google.com/file/d/18Zx1zASVo6tKrjcym8Dba0d35DM5OXW8/view?usp=drive_link Hexavalent Chromium]
 
[https://drive.google.com/file/d/1WoYK1vVHJLuaoRHqeJEC6zsi2RgVmj4I/view?usp=drive_link ANSI - General Safety in Welding and Cutting]
 
==Operation Notes==
 
* '''Solvent based metal cleaning should be done with Simple Green or other low-intensity cleaners.'''
 
* '''No brake cleaner.''' Brake cleaner contains chlorinated hydrocarbons that creates '''phosgene''' ("Nerve gas" from WWI) when combined with UV light.  ''Ventilation will not prevent poisoning.''
 
* Abrasive cleaning methods are also appropriate.
 
{| class="infobox" cellspacing="5" style="width: 22em; text-align: left; font-size: 100%; line-height: 1.5em;"
! colspan="2" class="infobox-image" | [[File:Metal_shop_TIG_welder_labels.png|300px|TIG welder]]
|-
|-
| colspan="2" | TIG welder in the Metal Shop
| colspan="2" | Bring any media you want
|-
|-
|}
|}


* The Shop supplies TIG welding consumables intended for use on mild steel. Users are responsible for providing consumables for other metals.
{| class="infobox" cellspacing="5" style="width: 12em; text-align: left; font-size: 100%; line-height: 1.5em;"
 
! colspan="2" class="infobox-image" | [[File:angela_20240318.jpg|300px|Angela_recline]]
* The Shop’s TIG welders use 100% Argon Gas.
 
* Beware of '''mild shock''' from the work table or the workpiece if the Ground Clamp is not attached.
 
==Set-Up Procedure==
 
'''1.  Safety First'''
 
* Turn on welding bay ventilation.
 
* Remove flammable materials and water from welding area.
 
* Protect bystanders from the arc-flash, If you can’t depend on the protective vinyl flaps on the welding bays, use welding screens.
 
* Make sure the workpiece is clean before welding. Flammable substances such as grease and oil can ignite.
 
'''2.  Attach the ground clamp''' to bare metal on the work table. If the workpiece is too large for the work table, clamp the workpiece.
 
'''3.  Outfit your work space'''
{| class="infobox" cellspacing="5" style="width: 22em; text-align: left; font-size: 100%; line-height: 1.5em;"
! colspan="2" class="infobox-image" | [[File:Metal_shop_TIG_welder_torch_exploded.png|300px|TIG torch]]
|-
|-
| colspan="2" | Exploded view of the TIG torch assembly
| colspan="2" | We are always recruiting new models
|-
|-
|}
|}
 
{| class="infobox" cellspacing="5" style="width: 12em; text-align: left; font-size: 100%; line-height: 1.5em;"
* '''Filler wire''' is available in the rack on the middle toolbar, outside the two large welding bays.
! colspan="2" class="infobox-image" | [[File:jim_sarah_cropped.png|200px|Jim Sarah silver]]
 
* '''Check the torch head.'''
 
Spare torch parts are kept in the Shop’s supply cabinet.
 
If necessary, insert a fresh tungsten electrode. Tungstens are sharpened on a dedicated pedestal grinder. '''Remember to remove gloves when using the grinder.'''
 
* Assemble other accessories as needed (clamps, magnets, wood TIG blocks, receptacle for hot trash, emergency water bottle (for burn first aid).
 
'''4.Check to see if the welder has been shut down properly.'''
 
* Is the power shut off?
 
* Is the gas shut off at the cylinder valve?
 
'''5.  Plug the machine in and turn on.'''
 
'''6.  Turn the gas on.'' If needed, adjust the pressure.
 
* '''SLOWLY crack the tank valve counterclockwise.''' Watch the regulator needle jump, and check that the needle has stopped moving before opening the valve (about half a turn). This procedure lessens the impact of the initial jump in pressure on the regulator, reducing wear and tear.
 
* Check the regulator dial to make sure the working gas pressure matches the recommendation listed on the shop tag attached to the regulator. Adjust if needed.
 
Note: if the welder has not been shut down properly by the previous user and the working pressure needs to be lowered, hold the Torch Head away from the workbench (more than 12 inches) and step on the foot control to lower the line pressure and receive an accurate pressure reading.
 
'''7.  Adjust the machine’s settings as necessary for the welding project.'''
 
* '''For welding steel, set to DC negative.'''
 
*  '''Set Amperage.''' This setting determines the maximum Amperage when the Foot Petal is fully depressed. (User provides Amperage control through Foot Petal use.)
 
* When welding steel on the Lincoln Electric Square Wave 175 Pro (red machine), make sure the switch on the front panel is flipped to “TIG,” and the large lever is on “DC —” (or DC Negative). AC polarity is recommended for TIG welding aluminum.
 
'''8.  Test the settings on a piece of scrap metal before proceeding to your project.'''
 
==Shut-Down Procedure==
 
'''1.  Shut the gas off at the source.''' Turn the cylinder valve clockwise.
 
'''2.  No need to bleed the lines.''' The Shop’s TIG welders use 100% Argon gas, which is non-corrosive.
 
'''3.  Flip the machine’s power switch to “off.” '''
 
'''4.  If no one is using the nearby bays, turn the ventilation off.'''
 
{| class="infobox" cellspacing="5" style="width: 22em; text-align: left; font-size: 100%; line-height: 1.5em;"
! colspan="2" class="infobox-image" | [[File:Metal_shop_TIG_welder_tungsten_grinding.png|500px|Tungsten grinding]]
|-
|-
| colspan="2" | Incorrect and correct grinding of Tungsten electrodes.
| colspan="2" | We are always interested in trying new things
|-
|-
|}
|}
'''5.  Return any unusual settings to for the next user.''' (Make sure on DC Neg., and “Pulse” turned off.)
'''6.  Loosely Coil the torch cord and store on the work table’s torch hook.'''
'''7.  Sharpen used Tungsten.''' Put away all tools and workplace accessories. Clean the work area.
1 - Use the shop’s dedicated pedestal grinder to sharpen / clean end of the tungsten electrode prior to welding.
2 - Grind longitudinally, not tangentially.
3 - Flat tip. Diameter of this flat determines amperage capacity.
==Videos==
[https://www.youtube.com/watch?v=CWoam95PVCE Havoc caused by a broken cylinder valve]
[https://www.youtube.com/watch?v=ejEJGNLTo84 Mythbusters episode on gas cylinder rocketry]
==Welding Safety==
Safety-wise, make sure your gloves (and, for that matter, all your skin and clothing) remain dry. This is a much bigger factor than glove leather thickness in mitigating electrical shock hazard.
(Shock hazard is less of a concern with MIG than with TIG or stick.)
'''Basics'''
* ALWAYS wear a proper face shield.
* ALWAYS wear close-toed shoes.
* ALWAYS wear a long-sleeved, non-flammable shirt.
* ALWAYS wear proper welding gloves.
* ALWAYS wear ear protection (earplugs or muffs) to prevent sparks from entering your ear canal. An eardrum punctured by a spark will instantly cauterize and never heal.
* NEVER weld on or near anything that's been cleaned with a chlorinated hydrocarbon like brake-cleaner. When combined with UV light, chlorinated hydrocarbons can create '''phosgene gas,''' which can cause serious injury or death. ''Ventilation will not prevent poisoning.''
* [https://www.ccohs.ca/oshanswers/safety_haz/welding/fumes.html Welding Fumes and Gases Fact Sheet]
* If you burn yourself, immediately douse with cold water: seconds count!
'''Fire'''
Make sure the weld area is free from all flammable materials such as flammable liquids, paper, etc.
Do not wear clothing or gloves that have been exposed to flammable liquids.
'''Electrocution'''
Before turning on a welding machine, make sure there are no puddles of water on the floor around the weld bench or the machine. Make sure the weld machine is dry, including the main box, the torch, the pedal, and the plug.
There is little risk of fatal electrocution from a properly working TIG weld machine. When
the user presses on the pedal to initiate the arc, a high-frequency low amplitude arc will
emit from the tip of the weld torch. Once the machine detects the grounded metal piece
that is to be welded, the arc will switch over to a high-amplitude DC current. Even if the
operator deliberately points it toward their body, the shock will be mild, since the machine
will not switch over to the high amplitude current.
'''Burns'''
Welded metal will remain hot for several minutes after it is welded. In most cases the heat
is localized near the weld itself.
In the case of more conductive materials, such as copper and aluminum, the heat may be more distributed throughout the material.
In the case of TIG welding, sparks and spatter are non-existent, unless rusty or dirty
metal is used. MIG welding steel will create sparks, so earplugs and full coverage safety
glasses should be worn to prevent burns to sensitive tissue.
Gloves must be worn when welding and handling recently welded material. White cotton
welding gloves may be used for light TIG welding, as long as they are free of holes. For
heavier welding, deerskin or heavy duty welding gloves should be used.
'''UV Burns'''
The light emitted from a weld arc is brighter than that of the sun. '''Do not look at the arc'''
without wearing a full-faced welding mask with a shade 10 or darker filter plate.
Always make sure the weld curtains are in place between the welder(s) and other people in the shop.
Be sure to cover any exposed skin, including cuff and collar areas, while
welding or observing inside the weld area.
The rays from the arc can cause a UV burn much worse than a sunburn.
Observers may use a cardboard mask with a shade 10 filter plate.
'''Compressed Gas Cylinders'''
Argon and CO2 are inert, nontoxic gases normally present in the atmosphere. However, if
allowed to fill an enclosed area these gases can fully displace breathable air, causing
asphyxiation and death.
At the Asylum, the greater potential danger is the valve being knocked off the cylinder, turning it into a rocket powerful enough to severely injury or kill people and damage equipment and the building itself.
The following guidelines must be followed at all times:
'''Storing'''
* Cylinders must ALWAYS remain upright and NEVER be placed horizontally.
* Cylinders must be secured with a non-combustible material (metal) to an immovable object to prevented them from falling.
'''Moving'''
* Cylinders must be securely capped.

Revision as of 21:09, 20 March 2024

Every Monday, 6:30 - 9:30 pm, Artisans Asylum, 96 Holton St Allston

Link to: Figure Drawing signup

Link to: Class Wiki page

Link to: EventBrite page for Asylum classes

Class Description

This is a weekly open studio class where people of all artistic levels are invited to explore the human form through drawing and painting from a live nude model. It's a great way to sharpen up skills that have become rusty during the pandemic or to practice something new. The instructor is there to offer advice or to give more detailed instructions if you want them.

Each session starts out with fast "gesture" poses up to the first break, and then the poses get longer so you can focus on the details. There is no set progression from one class to the next. You can jump in any time.

Sarah Miller model pic
Life drawing from a model
Dwg class pic naia
Regular drawing practice in a happy supportive community
Karina lily
Bring any media you want
Angela_recline
We are always recruiting new models
Jim Sarah silver
We are always interested in trying new things

Subcategories

This category has only the following subcategory.

T

Pages in category "TIG Welders"

The following 4 pages are in this category, out of 4 total.

E

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