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Registered Member #1497
Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801
For my coil gun I have a stud-mount SCR with current flowing from stud to lead and I'm wondering whether I should mount the short lead into the -ve buss bar and terminate the coil onto the stud, or the other way around and mount the stud to the buss bar with the lead going to the coil. Its a matter of semantics but I'm wondering if there would be any difference with the coil at 400V potential or 0V potential
My cap bank (tiny, wouldn't even qualify for a bank):
Right now its shown with the lead on the -ve buss bar, although I can easily drill a hole to fit the full stud and mount it, I'd rather leave the bar intact until I decide.
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
For ease of triggering, you'll want the cathode of the SCR connected to whatever part of your circuit you're considering as "ground". The negative bus bar would be a good place for ground, so I'm voting for negative.
Registered Member #1497
Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801
I drilled a hole big enough for the stud to mount to on a short piece of flattened copper pipe with 2 extra holes for mounting/connections. Also note the result:
I suppose I need to find a more secure way to mount the barrel/coil assembly :D I'll consider it a success!
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Stud-mount SCR - Mount on +ve buss bar or -ve buss bar?
