I'm remembering more about the E12S...
It is the same wiring as the E15 except it doesn't have the field weaking
circuit (the extra FWD speeds). It does reverse the field and that relay is
easy to fry. BTW I notice I don't have to be so gentle with FWD/REV with
the
E20 (found out by accident). I still do seem to recall the E12S uses an E15
motor.
Let us know how the controller works! I have another E12S in sad shape - it
would be nice to simplify the wiring and get it running.
- SteveS
----- Original Message -----
From: "Dave & Debbie Barden" <daveb seanet com>
To: <rjkanary nauticom net>; <ssawtelle fcc net>; <>; <daveb seanet com>
Sent: Thursday, February 12, 2004 2:10 AM
Subject: Re: (ET) motor on E12S...
Thanks. It is looking more and more like the Alltrac controller will work
with
the E12S motor. The E12 does use field switching and my machine continues
to
suffer welded contacts and blown fuses whenever the motor is stopped to
change
directions and the field collapses sending a surge of current back up the
line,
thus my concern with the field losing current. However I understand from
Steve
Richardson that their controller does monitor have over current
protection. I
am verifying also with him that the controller will switch the field for
forward reverse.
thanks again for all your responses and increasing my understanding of
motors.
dave
seattle
The field current requirements for the motors in question is for
all
intents and purposes identical. In all the twenty some years that I have
operated either the late model I-5 , or the earlier model eight speed
E-20,
I have yet to encounter a situation where field voltage was lost.
Since I do not have any information on the solid state controller
you
are planning on utilizing, I can't offer an opinion on whether or not it
offers armature overcurrent protection.
I do feel that the chances of a loss of field incident are slight.
Few
people ask their tractors to do what I ask of mine. If anyone should
have a
meltdown, it should be me.
If your tractor uses field switching for reversing, instead of
armature
reversing, I would recommend changing it over. It's not that bad of a
job,
especially if you have the Manual, and an organ donor tractor.
----- Original Message -----
From: "Dave & Debbie Barden" <daveb seanet com>
To: <rjkanary nauticom net>; <ssawtelle fcc net>;
<elec-trak cosmos phy tufts edu>
Sent: Tuesday, February 10, 2004 10:18 AM
Subject: Re: (ET) motor on E12S...
not being too electronically literate I need some help getting from A
to
C, A
being my motor has a shunt which supplies the field. To get to C I
have
to be
sure that the sep-X controller will work with that kind of field. One
of
Richardson's emails talked about their needing to modify the
controller to
work
with small current of the E15's field windings 3 amps instead of 30 I
think he
said. Judging from the small wires going to the field of the E12S
motor
and
the fact that it uses a shunt I would guess that the current would be
pretty
low as well??? And if steve is correct that the E12S uses an E15 like
motor it
should work. What I am really worried about is what will happen if my
field
loses current (blown fuse or fried relay) will the armature still be
getting
current from the controller???
thanks,
dave
The only wound field traction motor that does not possess the
extra
winding is the one used in the E-12 CA through HA models . This
category
includes the E-12 M.
Note that in the Homeowner's Service Manual, the E-12 S
armature
terminals are identified as A1 and S2, indicating the presence of a
'shunt'
winding.
----- Original Message -----
From: "steves" <ssawtelle fcc net>
To: <elec-trak cosmos phy tufts edu>
Sent: Tuesday, February 10, 2004 5:07 PM
Subject: Re: (ET) motor on E12S...
As I understand it - The E12S is basically an E12 with an E15
motor.
The
wiring is different than an E12. I would think, based on this, it
would
work. Someone correct if I'm wrong...
- SteveS
----- Original Message -----
From: "Dave & Debbie Barden" <daveb seanet com>
To: <plitch attglobal net>; <thumphrey mynra com>; <>
Sent: Tuesday, February 10, 2004 8:38 AM
Subject: (ET) motor on E12S...
I would really like to get the new Alltrax controller for my
E12S.
But
the
discussions on this list have all centered around the E15 and
E20.
My
ultimte
question is will the alltrax work with the E12S motor? Also
what
does
the S
in E12S signify? I thought I read that the E12S is a "compound"
motor
aka "shunt motor" right/wrong???
Bottom line, will the sep-X controller work on an E12S?
thoughts??
thanks,
dave
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