RE: [CAD_CAM_EDM_DRO] Question to Mariss about demagnetion was Re : Torque when usin

Using 4 wires instead of 6 gives you the equivalent of an 8-wire motor that
has been "series connected". What I did was to separate the centre tap in
each coil, effectively converting the motor into an 8-wire motor, then
connect pairs of coils in parallel, to give the equivalent of a parallel
connected 8-wire motor.

The point of the experiment was to see what difference in performance I get
with this configuration, running at 1.414 times the unipolar current
rating. I've been diverted from this by other activities, so experiments
not yet complete.

Regards,
Tony

At 12:43 04/02/2003 +0100, you wrote:

>Hi Tony,
>Please explain in details how did you changed from 6-wires to 4-wires
>configuration.
>Isn't this like simply using four wires instead six, externally?
>Peja
>
>-----Original Message-----
>From: Tony Jeffree [mailto:tony@...]
>Sent: Tuesday, February 04, 2003 12:27 PM
>To: CAD_CAM_EDM_DRO@yahoogroups.com
>Subject: Re: [CAD_CAM_EDM_DRO] Question to Mariss about demagnetion was
>Re: Torque when usin
>
>
>I think that there are a lot of "old wives tales" surrounding the supposed
>dangers of removing stepper motor end caps. I have done this with several
>different motors, with no detectable change in their performance. I think
>it unlikely that the rotor/stator would come to harm during this procedure
>unless you handled it very roughly.
>
>Obviously, it is a smart move to take sensible precautions (don't work next
>to your mill while flycutting a piece of cast iron, for example), but
>nothing more than you would take when dismantling/assembling any other
>precision device, and bearing in mind that magnets will naturally attract
>any stray ferromagnetic particles.
>
>Most recently, I removed the end cap from a 200 oz-in size 23 motor to
>change it from 6-wire to 4-wire configuration; perfectly possible to do
>with care, and the patient definitely survived. Whether it was a worthwhile
>thing to do is a completely separate question of course - the jury is still
>out on that!
>
>Regards,
>Tony
>
>
>
>
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Regards,
Tony