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" <dengv...@charter.net> 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
