Anonymous

Marshall Dynabolt 250 Amp AC/DC Tig Welding Set: Difference between revisions

From London Hackspace Wiki

Marshall Dynabolt 250 Amp AC/DC Tig Welding Set (view source)

Revision as of 00:32, 1 September 2019

6,742 bytes added ,  1 September 2019
no edit summary
No edit summary
No edit summary
Line 36: Line 36:


http://www.lincolnelectric.com/en-us/support/welding-how-to/Pages/tig-welding-aluminum-detail.aspx
http://www.lincolnelectric.com/en-us/support/welding-how-to/Pages/tig-welding-aluminum-detail.aspx
--------------------------------------------------------------------------------------------------------
Update WIP
TIG (Tungsten Inert Gas) welding is particularly useful for aluminium, It uses an electrode nozzle with a fixed (should be permanent, but they do wear) tungsten tip where a plasma 'flame' is created (started with a high-voltage / high frequency starter) and used to heat the filler wire and joint. The nozzle allows a flow of inert shield gas around the working area, reducing slag creation and (particularly important with aluminium) oxidation.
The '''TIG welder''' is a 'stick' welder - the electrode / nozzle is held in one hand, and the filler wire applied with the other.
==Shield gas ==
For the TIG we use a [http://www.boconline.co.uk/en/products-and-supply/industrial-gases/inert-gases/pureshield-argon/pureshield-argon.html Pureshield Argon].<br/>
===Gas bottle replacement log===
{| class="wikitable"
|-
! Date
! Who
! Notes
|-
| 06/06/15 || Matt || First Bottle
|-
| 11/06/15 || Russell ||
|-
|}
==Capacity and rating ==
[[File:Tig Welder Rating Plate.jpeg|thumb|400px|Rating Plate]]
The Tig welder has a large range
Power is from a 63 amp socket, on the highest setting the Tig could draw more current than this
<br clear=all>
==Controls==
[[File:TIGWelderFrontPanel.JPG|250px]]<br clear=all>
Details on the front panel controls
{| class="wikitable"
|-
! Name
! Picture
! Description
|-
| Main On Off Switch || [[File:TIGWelderOn Off Switch.JPG|200px]] || Main switch on the welder, remember to turn off the welder as much as possible in-between setting up for welds
|-
| DC+ AC DC- selector || [[File:TIGWelderDC+ AC DC- Switch.JPG|200px]] || '''Do not change this setting with the main power switch ON.'''<br/> This selector has three positions that control the mode of the welder<br/>
* DC- (DCEN), DC Electrode Negative, used for Steel TIG
* AC, used for Aluminium TIG
* DC+ (DCEP), DC Electrode Positive, used for Arc
|-
| Working power range selector || [[File:TIGWelderWorkingPowerRange.JPG|200px]] ||  '''Do not change this setting with the main power switch ON.''' <br/>There are three possible working ranges, low, medium and high. Each has a slightly different range for DC or AC
{|
! Position
! AC
! DC
|-
| Up || 140-310 || 125-310
|-
| Middle || 40-165 || 40-190
|-
| Down || 10-45 || 10-55
|}
|-
| Percentage power dial || [[File:TIGWelderPercentagePowerWithinRange.JPG|200px]] || Main power control dial, used to fine tune the amp control of the welder. <br/>This dial acts as a percentage of the current selected range.
|-
|Remote control enable||[[File:TIGWelderRemoteAmpageControlSwitch KEEPswitchedOFF.JPG|200px]] || Used to enable remote current control when a foot control is installed.<br/> '''Until we have a remote foot pedal this should be left in the OFF position.'''
|-
| High Frequency control || [[File:TIGWelderHF OnAtStrike Off Continous Switch.JPG|200px]] || Controls the high frequency generation of the welder, this switch has three positions and each has a set use.<br/>
*Up (IO) High frequency start, use this for DC TIG welding (Steels)
*Middle (O) Off used for Stick welding
*Down (I) On, used to AC TIG welding (Aluminum)
|-
| Remote trigger enable || [[File:TIGWelderTorchSwitchEnable TIG-on STICKoff.JPG|200px]] || '''This should be left in the ON position.''' <br/> Used to enable the remote trigger, only place in OFF position when doing Arc welding
|-
| Gas overrun timer || [[File:TIGWelderGasOverrunTimer.JPG|200px]] || Controls how long after arc cut off the gas will run for. <br/> Outer scale is tungsten width, inner scale is time in seconds
|}
==Tungsten and collets==
We have a selection of the following tungsten tips and collets to fit
{| class="wikitable"
!Size
! Color band
! Grade
! Used for
! Notes
|-
| 1.6mm ||style="background-color: red;"|Red  || 2% Thoriated || DCEN Steel || Slightly radioactive! Do not sharpen without wearing a dust mask.
|-
| 2.4mm ||style="background-color: red;"| Red || 2% Thoriated || DCEN Steel || Slightly radioactive! Do not sharpen without wearing a dust mask.
|-
| 1.6mm ||style="background-color: white;"| White || Zirconaited|| AC Aluminium ||
|-
| 2.4mm ||style="background-color: white;"| White || Zirconaited || AC Aluminium ||
|-
| 1.6mm ||style="background-color: gold;"| Gold || 1.5% Lanthanated || AC or DCEN, All rounder Steel or Aluminium ||
|-
| 2.4mm ||style="background-color: gold;"| Gold || 1.5% Lanthanated|| AC or DCEN, All rounded Steel or Aluminium ||
|-
|}
Tungsten electrodes come in a a range of different grades/types, each performs differently and have their own uses.<br/>
They are marked with a colour band at one end, do not grind this off!<br/>
The following was borrowed from [http://weldingweb.com/archive/index.php/t-57759.html here]
ZIRCONIATED Tungsten Color Code WHITE or BROWN, are best suited for AC Tig welding applications.<br/>
Zirconiated, White, AC Welding applications. Better start up than Pure Tungsten, Balls up well and has a more stable arc than Pure Tungsten. Better current carrying capacity and high resistance to contamination during welding.
LANTHANATED Tungsten Color Code BLACK, GOLD or BLUE, is suitable for AC & DC welding applications.<br/>
Lanthanated, Black, AWS Class EWLA-1.5, AC & DC welding applications. Non-Radioactive Good arc characteristics in ac/dc applications. Applications: carbon & stainless steel, nickel alloys and titanium.
CERIATED Tungsten Color Code GREY or ORANGE, are best suited for low amperage DC welding applications.<br/>
Ceriated, Grey, An excellent alternative to Thoriated tungsten especially in low amperage welding. Takes 10% less current to start and has a very stable arc.
PURE Tungsten Color Coded GREEN, are best suited for AC Tig welding applications.<br/>
Pure Tungsten, Green, AWS Class EWP, AC welding applications. Least expensive of all electrodes. Applications: aluminum and magnesium alloys.
THORIATED Tungsten Color Code RED, YELLOW, MAUVE or ORANGE, is best suited for DC Tig welding applications.<br/>
2% Thoriated, Red, AWS Class EWTH-2, DC welding applications. The most common type of electrode used today. Applications: carbon & stainless steel, nickel alloys and titanium.
===Grinding tip shapes===
Do not grind the end with the color band!
==Power supply ==
A 63A plug and socket connection is used, with a pushbutton on/off control station and no-volt release.<br/>
RFID control of access will be installed shortly.
==Tig welding tips==
Random collection of useful links
* http://www.mig-welding.co.uk/tig-technique.htm
* http://www.millerwelds.com/resources/improving-your-skills/tig/
* http://www.mig-welding.co.uk/tig-calculator.htm
* http://www.gowelding.org/TIG_Welding.html
Deanforbes
901

edits

Retrieved from ‘https://wiki.london.hackspace.org.uk/view/Special:MobileDiff/53252’