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Old 6th Aug 2018, 3:14 pm   #31
PSValves
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Join Date: Jul 2008
Location: Nottingham, UK.
Posts: 151
Default Re: Battery tag spot welder.

Quote:
Originally Posted by jonnybear View Post
I found with a mechanical relay I was unable to get accurate timing, and found sometimes when contacts were releasing there was a lot of arching, back emf from the transformer, causing contacts to stick which is what you don't want as it will vaporise the nickel contact strip and could blow a hole in the lithium battery
Thanks - you've confirmed my worst fears here. Electronic switching it is
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