FW: (ET) Reversing E20 DA Motor Polarity

["Raymon R. Ellis" <rayellis direcway com>]

-----Original Message-----
From: Raymon R. Ellis [mailto:rayellis direcway com] 
Sent: Friday, August 27, 2004 8:52 PM
To: 'Christopher Zach'
Subject: RE: (ET) Reversing E20 DA Motor Polarity

Chris, I wish but it's too late. The controller switches the field F1 and
F2. I have not tried to change anything at this point. It would be easy to
switch the field connections on the controller box, buy I hope I can find
someone who is qualified and who had made that move. I really don't know
anything about the consequences of switching the field wires. It would also
be easy to switch the cables at the main motor, if that is an OK thing to
do. I will ask the person assigned to me by the supplier but he is not
available right now and he has not fully installed his E20 controller. I
would name the persons but I don't think that would be fair to all involved
because I do not understand all I don't know about this technology. It's
comforting to get your comments, however, so keep the ideas coming. Raymon

-----Original Message-----
From: Christopher Zach [mailto:czach computer org] 
Sent: Friday, August 27, 2004 6:54 PM
To: Raymon R. Ellis
Subject: Re: (ET) Reversing E20 DA Motor Polarity

Hm. See, I'd take the basket and contactors :-)

Seriously, the controller runs the motor normal in one direction, choppy 
in the other. If you reverse the controller's impact on the motor, is 
the effect the same? What does the controller reverse on the E20; the 
field or the armature current?

My guess is the field, and perhaps that is the problem. On E20s, the 
field is kept constant and the armature is reversed. Reversing just the 
field might do odd things when you factor in the compensation field that 
is hard wired in series with the armature.

The E15 reversed the field, but that's a different tractor and motor.

Chris

Raymon R. Ellis wrote:

> Chris, I removed all contactors to make room for the controller and it
would
> be impossible for me to rewire the tractor back to original setup. The
wires
> occupy a large basket now. Thanks anyway, Raymon
> 
> -----Original Message-----
> From: Christopher Zach [mailto:czach computer org] 
> Sent: Friday, August 27, 2004 5:59 PM
> To: Raymon R. Ellis
> Cc: 'Elec-Trak Digest'
> Subject: Re: (ET) Reversing E20 DA Motor Polarity
> 
> Um. I wonder if you could just leave the two push-pull contactors intact 
> with respect to the armature and run the motor direction control that 
> way.
> 
> Chris
> 
> Raymon R. Ellis wrote:
> 
> 
>>Will a member, maybe Ralph, who has experience with the electronic 
>>controller conversion of the E20, tell me the best way to change 
>>rotation direction on the E20 motor? The original setup of the drive 
>>motor runs best in one direction and is kind of jumpy in the other 
>>direction. Is it OK to run the motor with armature cables reversed so 
>>that the smooth running is in forward gears? The motor now wired in 
>>accordance with supplier provided schematic is jumpy in forward and 
>>smooth as silk in reverse. The motor was tested before the conversion 
>>using two 12v batteries and direction of rotation was reversed by 
>>changing either the polarity of the field (F1 & F2) or the armature (A1 
>>& S2). A comment will be appreciated. Thank you. Raymon Ellis
>>
>>
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> 
> 
>