Re: (ET) Strange Alltrax behavior

["David Roden" <etpost drmm net>]

On 15 Aug 2019 at 13:49, Steve Gaarder wrote:

> Still no light and no nuthin.  What's left besides a dead controller?

That sounds like bad news to me.  

If you're sure that both traction and logic power are getting to the 
controller (and make sure they are), then most likely its logic has broken 
down (kind of like logic in general around the world these days).

Lots of folks have fitted ETs with Curtis controllers.  However, if I were 
replacing my Alltrax today, I'd probably try a 4QD.  

Despite their name, 4QD controllers are not all 4-quadrant type.  They're 
designed for PM motors, which IMO makes them more appropriate for our 
separately excited motors than Curtis's series motor controllers.  But I'm 
not a EE ...


David Roden - Akron, Ohio, USA

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