Re: (ET) Sparks!

["Harold Zimmerman-Clean Power Supply" <cleanpower att net>]

 Sounds like 1A is the one not closing. A reading of approx. 36V on the 
coil and almost no voltage across the contacts when running is what you're 
looking for. Sounds like current was flowing through the resistor instead 
of the contacts of 1A and when you applied your test lead it tried to flow 
through there and the lead couldn't handle it.
 Harold Zimmerman

On July 21, 2013 at 1:01pm -0400, you wrote:

>I was having problems getting my E12M to move forward and traced it to a 
>bad micro-switch.  Replaced and all seemed ok for a short time.  Now, no 
>high speed (2A).  2A coil has 38v, but no v on its contacts.  Wanted to 
>check for voltage on 1A contact which should feed 2A.
>
>With drive motor running in 2nd speed, but lever in high, I touched meter 
>probe to the 1A contact (wire #7), got sparks and nearly burned my probe 
>in 1/2.  Am fairly certain the probe wasn't touching anything else.  
>Before I ruin a good Fluke meter, or its probe, thought I better ask 
>what's going on.  :-)
>
>Was current being diverted from R2 through the meter?  Or?  I should 
>mention I replaced 1A (needlessly) when doing the original 
>troubleshooting.  It's a slightly different style contactor than the 
>original but don't think it explains this.
>
>Thanks.
>
>Thon
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