Homebrew PCBs

Yeah, removing negative is much better, I posted the wrong terminal.  It
also doesn't generate sparks when you're fiddling with it.

Don't rely on which cable is grounded on the chassis though, there are
models that use positive ground just to keep people on their toes.

The best indicator of which cable is which is the small symbol near the
terminal. Don't trust the terminal rubber covers or cable colours 'cause
that can be replaced 'wrong' by a previous owner.

Robert
:)


-----Message d'origine-----
De : Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] De
la part de Stefan Trethan
Envoyé : juillet 3 2005 13:53
À : Homebrew_PCBs@yahoogroups.com
Objet : Re: [Homebrew_PCBs] Re: Hmm, another thought....


You know it is better to disconnect negative? If you start with positive  
you can easily short it to ground with the wrench while you undo the nut  
on the clamp. Also, there is often no obstructing rubber thingy on it.  
Open circuit is open circuit so that doesn't change anything.

As for using car batteries for EDM, you still need to limit electrode  
current and switch it on/off. You could probably replace the first part of  
the large supply schematic with them, but i think then you can just as  
well go all the way.

ST


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