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Re: Oscilloscope Posted by SWEDECAR [Email] (#112) [Profile/Gallery] (more from SWEDECAR) on Fri, 30 Mar 2012 08:41:19 In Reply to: Oscilloscope, AdamSAAB2kAero [Profile/Gallery] , Fri, 30 Mar 2012 03:58:13 Members do not see ads below this line. - Help Keep This Site Online - Signup |
The left picture is of a failed pump so that is already too late.
As you can see the time base is different between the two pictures so the left show 7 full revolutions of the pump whereas the right picture only show barely 1 revolution since the commutators are usually made up of about 8 plates.
I have seen some pumps where the whole amp pattern drops down in a wavy pattern but not all the way to down zero. How much longer life a pump like that have is impossible to predict though.
Anders
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