Re: [Emc-users] OT: What Is It?

[Dave Cole]

Once it was stated what it was the thrill was gone.  :-)
My Dad has a Cyber Tig.  Its a heavy machine.   We had to adjust the 
spark gap many years ago, but those electrodes are pretty beefy and last 
a long time.

Dave

On 2/20/2017 4:37 PM, Kirk Wallace wrote:
> On 02/17/2017 07:23 PM, Erik Christiansen wrote:
>> On 17.02.17 10:17, Kirk Wallace wrote:
>>> I know what it is, but while cruising through my pictures I got the
>>> notion that these look like a "What Is It" kind of thing. I thought I'd
>>> post them just for fun.
>> Kirk, the patterns arising from the metal transfer are intriguing.
>> The next question, though, is "What is it for?", and why the
>> symmetrical sparkgaps?
> I'm a little surprised that this "What's It" didn't get more replies.
> The pictures are of my Hobart TIG welder's spark gap assembly. The spark
> gap is used in a circuit that adds a high frequency signal to the torch
> to aid in starting an arc without having to touch the workpiece with the
> electrode tip. Getting any workpiece material on the tip will ruin the
> tip. I found a circuit of a DIY add-on arc starter here:
> http://www3.telus.net/public/a5a26316/WelderPDFs_Pics/dbARC_START.pdf
>
> which includes spark gaps. I believe the space between the gaps sets the
> output voltage. I don't really know much about welder technology or
> welding. Acquiring this knowledge has been on my ToDo list for many
> years. I have been successful at doing some steel and aluminum welding
> with this unit, but just enough to get a couple of jobs done.
>
> http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/
>

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Re: [Emc-users] OT: What Is It?

[Erik Christiansen]

On 20.02.17 13:37, Kirk Wallace wrote:
> I'm a little surprised that this "What's It" didn't get more replies. 
> The pictures are of my Hobart TIG welder's spark gap assembly. The spark 
> gap is used in a circuit that adds a high frequency signal to the torch 
> to aid in starting an arc without having to touch the workpiece with the 
> electrode tip.

Ah, that's just about late 1800's technology. What a blast to still have
a practical use for it. I can't help wondering, though, what it does for
local AM radio reception?

> Getting any workpiece material on the tip will ruin the 
> tip. I found a circuit of a DIY add-on arc starter here:
> http://www3.telus.net/public/a5a26316/WelderPDFs_Pics/dbARC_START.pdf

Did you wind the high voltage coupling transformer yourself? It doesn't
look a lot like a catalogue item from here. I'm surprised there isn't a
capacitor right in the output, with it connected across the welder
output. (Based on zero welder expertise, admittedly.)

> which includes spark gaps. I believe the space between the gaps sets the 
> output voltage.

Back when I was a teenager, taking a more active interest in physics, we
used to gauge the voltage of arcs by the rule of thumb "A kilovolt per
mm, in dry air." I never had anything which could measure umpty kv to
confirm the estimate.

> I don't really know much about welder technology or welding. Acquiring
> this knowledge has been on my ToDo list for many years. I have been
> successful at doing some steel and aluminum welding with this unit,
> but just enough to get a couple of jobs done.

What I've read on Al welding has just served to convince me to stick
with ferrous welding. And stainless seems easy to get wrong too. Then,
even cast iron just bubbles when you aim an arc at it, so I settle for
simple fabricating with plain steel, and building up the old mattock
I've worn to a nubbin, grubbing 'orrible weeds, and digging ditches.

Erik

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Re: [Emc-users] OT: What Is It?

[John Figie]

It looks like some kind of RF noise generator.   Actually the file path
name with "TIG" in it gives it away.

On Feb 20, 2017 5:30 PM, "dave"  wrote:

I think you just answered your own question. I suspect the spark gap
generated the hi-freq that makes non-contact arc start possible. If you
remember the earliest transmitters were a spark gap ... eg. wide-band
noise.

W  in your tig weld is a cause for automatic rejection (missile
propellant loading system piping.  It shows up on the x-ray as a really
white spot; much more radio-opaque than 18-8 SS. I'm told that a
majority  of present day  TIG is still done with scratch start. I
suppose when you do it all the  time scratch is easy.
HTH

Dave


On 02/20/2017 01:37 PM, Kirk Wallace wrote:
> On 02/17/2017 07:23 PM, Erik Christiansen wrote:
>> On 17.02.17 10:17, Kirk Wallace wrote:
>>> I know what it is, but while cruising through my pictures I got the
>>> notion that these look like a "What Is It" kind of thing. I thought I'd
>>> post them just for fun.
>> Kirk, the patterns arising from the metal transfer are intriguing.
>> The next question, though, is "What is it for?", and why the
>> symmetrical sparkgaps?
> I'm a little surprised that this "What's It" didn't get more replies.
> The pictures are of my Hobart TIG welder's spark gap assembly. The spark
> gap is used in a circuit that adds a high frequency signal to the torch
> to aid in starting an arc without having to touch the workpiece with the
> electrode tip. Getting any workpiece material on the tip will ruin the
> tip. I found a circuit of a DIY add-on arc starter here:
> http://www3.telus.net/public/a5a26316/WelderPDFs_Pics/dbARC_START.pdf
>
> which includes spark gaps. I believe the space between the gaps sets the
> output voltage. I don't really know much about welder technology or
> welding. Acquiring this knowledge has been on my ToDo list for many
> years. I have been successful at doing some steel and aluminum welding
> with this unit, but just enough to get a couple of jobs done.
>
> http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/
>



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Re: [Emc-users] OT: What Is It?

[dave]

I think you just answered your own question. I suspect the spark gap 
generated the hi-freq that makes non-contact arc start possible. If you 
remember the earliest transmitters were a spark gap ... eg. wide-band 
noise.

W  in your tig weld is a cause for automatic rejection (missile 
propellant loading system piping.  It shows up on the x-ray as a really 
white spot; much more radio-opaque than 18-8 SS. I'm told that a 
majority  of present day  TIG is still done with scratch start. I 
suppose when you do it all the  time scratch is easy.
HTH

Dave


On 02/20/2017 01:37 PM, Kirk Wallace wrote:
> On 02/17/2017 07:23 PM, Erik Christiansen wrote:
>> On 17.02.17 10:17, Kirk Wallace wrote:
>>> I know what it is, but while cruising through my pictures I got the
>>> notion that these look like a "What Is It" kind of thing. I thought I'd
>>> post them just for fun.
>> Kirk, the patterns arising from the metal transfer are intriguing.
>> The next question, though, is "What is it for?", and why the
>> symmetrical sparkgaps?
> I'm a little surprised that this "What's It" didn't get more replies.
> The pictures are of my Hobart TIG welder's spark gap assembly. The spark
> gap is used in a circuit that adds a high frequency signal to the torch
> to aid in starting an arc without having to touch the workpiece with the
> electrode tip. Getting any workpiece material on the tip will ruin the
> tip. I found a circuit of a DIY add-on arc starter here:
> http://www3.telus.net/public/a5a26316/WelderPDFs_Pics/dbARC_START.pdf
>
> which includes spark gaps. I believe the space between the gaps sets the
> output voltage. I don't really know much about welder technology or
> welding. Acquiring this knowledge has been on my ToDo list for many
> years. I have been successful at doing some steel and aluminum welding
> with this unit, but just enough to get a couple of jobs done.
>
> http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/
>


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Re: [Emc-users] OT: What Is It?

[Kirk Wallace]

On 02/17/2017 07:23 PM, Erik Christiansen wrote:
> On 17.02.17 10:17, Kirk Wallace wrote:
>> I know what it is, but while cruising through my pictures I got the
>> notion that these look like a "What Is It" kind of thing. I thought I'd
>> post them just for fun.
>
> Kirk, the patterns arising from the metal transfer are intriguing.
> The next question, though, is "What is it for?", and why the
> symmetrical sparkgaps?

I'm a little surprised that this "What's It" didn't get more replies. 
The pictures are of my Hobart TIG welder's spark gap assembly. The spark 
gap is used in a circuit that adds a high frequency signal to the torch 
to aid in starting an arc without having to touch the workpiece with the 
electrode tip. Getting any workpiece material on the tip will ruin the 
tip. I found a circuit of a DIY add-on arc starter here:
http://www3.telus.net/public/a5a26316/WelderPDFs_Pics/dbARC_START.pdf

which includes spark gaps. I believe the space between the gaps sets the 
output voltage. I don't really know much about welder technology or 
welding. Acquiring this knowledge has been on my ToDo list for many 
years. I have been successful at doing some steel and aluminum welding 
with this unit, but just enough to get a couple of jobs done.

http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/

-- 
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/

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Re: [Emc-users] OT: What Is It?

[Erik Christiansen]

On 17.02.17 10:17, Kirk Wallace wrote:
> I know what it is, but while cruising through my pictures I got the 
> notion that these look like a "What Is It" kind of thing. I thought I'd 
> post them just for fun.

Kirk, the patterns arising from the metal transfer are intriguing.
The next question, though, is "What is it for?", and why the
symmetrical sparkgaps?

Erik

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Re: [Emc-users] OT: What Is It?

[Dave Caroline]

Classic metal transfer due to the arc

Dave Caroline

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Re: [Emc-users] OT: What Is It?

[Kirk Wallace]

On 02/17/2017 10:27 AM, Bengt Sjölund wrote:
> Sparkgaps

I recall that the second picture (6906) was hard to get. The 
interference was shutting the camera down. I had to back off about 4 
meters, zoom in and crop a lot of the picture. It's fuzzy and still has 
some noise.

>
> Den 2017-02-17 kl. 19:17, skrev Kirk Wallace:
>> I know what it is, but while cruising through my pictures I got the
>> notion that these look like a "What Is It" kind of thing. I thought I'd
>> post them just for fun.
>>
>> http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/dcp_6901.jpg
>> http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/dcp_6906.jpg
>> http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/dcp_6903.jpg
>> http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/
>>
>
>
> --
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>


-- 
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/

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Re: [Emc-users] OT: What Is It?

[Bengt Sjölund]

Sparkgaps


Den 2017-02-17 kl. 19:17, skrev Kirk Wallace:
> I know what it is, but while cruising through my pictures I got the
> notion that these look like a "What Is It" kind of thing. I thought I'd
> post them just for fun.
>
> http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/dcp_6901.jpg
> http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/dcp_6906.jpg
> http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/dcp_6903.jpg
> http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/
>


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[Emc-users] OT: What Is It?

[Kirk Wallace]

I know what it is, but while cruising through my pictures I got the 
notion that these look like a "What Is It" kind of thing. I thought I'd 
post them just for fun.

http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/dcp_6901.jpg
http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/dcp_6906.jpg
http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/dcp_6903.jpg
http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/

-- 
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/

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