8 wire half or Serial ? ( was Speed - Parallel vs serial ( was Re: Motor

--- In CAD_CAM_EDM_DRO@y..., "turbulatordude" <davemucha@j...> wrote:

> In my application, I am replacing the NEMA 23's with NEMA34's for
> physical constraints, but want to run the 8 wire 34's serial.

> > > finding the correct 2 pairs and series wiring would use half
> > > nameplate, and run half as fast. Like an end connected 6 wire.

> > > > In any case, I believe the way to approach this is
> > > >
> > > > 1. determine the paired wires with multimeter
> > > > 2. pick any 2 pairs, connect them to the driver.
> > > > 3. Test. If wrong pair motor will not turn, probably make
> noise,
> > > but
> > > > no harm done. (experts please correct if wrong)
> > > > 4. Make a note, pick another 2 pairs.
> > > > 5. At most, you need only 3 trials before you get the motor
> > > turning,
> > > > and at most 4 to get them turning correctly.

To connect in serie, perhaps add the following steps to the above:

6. Note which pair of pairs are A and A', B and B', (pair of pairs
which will miss when connected.

7. Note which sense motor will turn when, say A and B are connected,
plus the polarity of the wires when connected.

8. Note which sense motor will turn when A' and B are connected, plus
the polarity of the wires when connected.

9. Now you have an idea of where the "+" and "-" of coil A and A'

10. Repeat for, say B and A, and B' and A.

11. Join connect the, say, "+" to the "-" of A and A' and the "+"
and "-" of B and B'

There you are, 8 wires connected in series without knowing the color
code of the wires. Haven't done this before myself. Will appreciate
to get feedback on whether the scheme will work.

Thanks

Peter