CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding

Posted by Bertho Boman
on 2000-10-16 04:52:06 UTC
One type of spotwelder is the the pulse type as you are describing, the other type is the very low voltage AC at lots of amps.

I have built a low voltage one. Basically, you need only a volt but hundreds of amps. To get one volt, you only need a turn of two
on a transformer but you need to use "starter cables" for size or an equivalent ribbon conductor.

You might want to try a really big toroid transformer and then run a turn or two through the center.

Bertho Boman
=======================

Ian Wright wrote:

> Hi,
>
> I know this is a bit off topic but I know you lot out there have all the
> expertise in the world!
>
> Does anyone have any idea whether it would be possible to make a simple
> resistance welding set-up for tiny jobs? Basically what I am wanting is a
> way of spot welding bits of watch or small clock mainspring material
> together - spring steel up to about 15 thou thick with welds probably about
> 1.64" diameter. I was thinking it might be possible using just a big power
> supply and capacitor like in EDM and discharge this through some kind of
> 'clip' but I'm not sure how to control the discharge (SCR, Triac?) Also I'm
> not sure about the voltage/current needed - a 24 volt, 10 Amp transformer
> with a bridge rectifier and 10,000uf capacitor seems to give an impressive
> spark but would this be enough to weld my bits of steel or is it only good
> at screwdriver blades? ;o)

Discussion Thread

Ian Wright 2000-10-16 04:28:27 UTC A bit off topic - resistance welding Bertho Boman 2000-10-16 04:52:06 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding Rich D. 2000-10-16 08:03:25 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding Lee Studley 2000-10-16 10:43:16 UTC Re: A bit off topic - resistance welding Anne Ogborn 2000-10-16 10:58:29 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding Alan Marconett KM6VV 2000-10-16 11:08:15 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding Bertho Boman 2000-10-16 12:26:16 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding Paul Corner 2000-10-16 12:46:14 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding Ron Ginger 2000-10-16 12:55:46 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding wanliker@a... 2000-10-16 13:01:59 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding Ian Wright 2000-10-16 13:32:45 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding Tim Goldstein 2000-10-16 13:43:38 UTC RE: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding ballendo@y... 2000-10-16 15:45:13 UTC Re: A bit off topic - resistance welding Hugh Mahlendorf 2000-10-16 19:34:41 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding Doug Warner 2000-10-16 20:56:42 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding Robert Grauman 2000-10-16 21:06:01 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding wanliker@a... 2000-10-16 21:14:09 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding Matt Shaver 2000-10-16 21:17:40 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding Jon Elson 2000-10-16 22:09:33 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding Randy Gordon-Gilmore 2000-10-16 22:44:04 UTC Re: A bit off topic - resistance welding Ian Wright 2000-10-17 02:18:06 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding Robert Grauman 2000-10-17 08:26:58 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding John D. Guenther 2000-10-17 08:37:32 UTC Re: A bit off topic - resistance welding Darrell 2000-10-17 09:47:48 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding wanliker@a... 2000-10-17 11:23:52 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding James Owens 2000-10-17 11:51:06 UTC Re: [CAD_CAM_EDM_DRO] A bit off topic - resistance welding