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Re: (ET) Re: ET reliability

Overall, the tractors that use the armature contactors for reversal have proven to be the units that will withstand operator error. In the magazine articles that appeared after the introduction of the Elec-Trak®, one of the demonstrations was a tire smoking Reverse to Forward to Reverse sequence without the use of the brakes.
----- Original Message ----- From: "Elie, Larry (L.D.)" <lelie ford com> To: "RJ Kanary" <rjkanary nauticom net>; "SteveS" <ssawtelle fcc net>; "et" <Elec-trak cosmos phy tufts edu> 
Sent: Thursday, November 04, 2004 12:40 PM
Subject: RE: (ET) Re: ET reliability
OOPS. Yes, E12 (NOT S) E12 26AE12HA GR17 963. Same control as E12M. The S has the electronic controls. 

I stand corrected.  Yep, THAT'S why it's robust.

Larry Elie


-----Original Message-----
From: RJ Kanary [mailto:rjkanary nauticom net]
Sent: Thursday, November 04, 2004 12:18 PM
To: Elie, Larry (L.D.); SteveS; et
Subject: Re: (ET) Re: ET reliability


    Is it within the realm of possibility that there exists some confusion
between the E-12 S, which has a front mount mower and electronic controls,
the E-12, which also has a front mount mower, but has a centrifugal switch
on the traction motor, traction  motor reversal handled by contactors and
the E-12 M, that has the same electrical configuration as the E-12, but has 
a mid mount mower ?
----- Original Message ----- From: "Elie, Larry (L.D.)" <lelie ford com> 
To: "SteveS" <ssawtelle fcc net>; "et" <Elec-trak cosmos phy tufts edu>
Sent: Thursday, November 04, 2004 10:53 AM
Subject: RE: (ET) Re: ET reliability



I'm a bit surprised.  I've reversed an E12S at speed PULLING A TRAILER
without consequence.  An E15 under similar circumstances fried a board.
The worst I've done is overheat a thermal switch on the drive motor which
reset in 10 minutes. That was disking in D2 for too long. I've not tried 
an E20/I5 because I don't have one.  I like simple, and even if something
on an E12S goes, it's not too hard to fix. BTW, my E12S doesn't even have any control boards to corrode or fry like a newer models; it's all relays, 
contactors and wire.  Very robust.

Larry Elie


-----Original Message-----
From: elec-trak-bounces cosmos phy tufts edu
[mailto:elec-trak-bounces cosmos phy tufts edu]On Behalf Of SteveS
Sent: Thursday, November 04, 2004 10:24 AM
To: et
Subject: Re: (ET) Re: ET reliability


My understanding is that an E12S is an E15 without the field-weakening
throttle positions (not a PM either). So it is a pretty simple machine.
However, mine does not tolerate reversing without stopping first - the
reverse relay gets eaten. My E20, on the other hand, seems to tolerate
indiscriminate reversing pretty well (no problems yet).

- SteveS


David Roden (Akron OH USA) wrote:


If I'm not mistaken, the later E12 had a PM motor; early production was
wound
field type.  I was thinking that the later PM model was the E12S, but
perhaps
not (or perhaps that's not the "S" difference).


David Roden - Akron, Ohio, USA
1991 Solectria Force 144vac
1991 Ford Escort Green/EV 128vdc
1970 GE Elec-trak E15 36vdc
1974 Avco New Idea 36vdc
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_______________________________________________
Elec-trak mailing list
Elec-trak cosmos phy tufts edu
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak