Re: [Emc-users] OT: What Is It?
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/ > -- Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: What Is It?
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 -- Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: What Is It?
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/ > -- Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: What Is It?
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/ > -- Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: What Is It?
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/ -- Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: What Is It?
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 -- Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: What Is It?
Classic metal transfer due to the arc Dave Caroline -- Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: What Is It?
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/ >> > > > -- > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: What Is It?
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/ > -- Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] OT: What Is It?
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/ -- Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users