Re: fickle y-axis

Hi Jeff,

So the rotor will rotate in a very definate sense - clockwise, and
not in a fickle manner? This is what I am puzzled about.

Peter


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "jeffalanp" <xylotex@h...>
wrote:

> Hi Peter,
> The problem with your picture below is that if your (A) was
> energized, then the rotors' (S) would point to the (B)(1:30

o'clock),

> half way between your 12 o'clock and 3 o'clock (N)/(A). It

wouldn't

> just point to the 12 o'clock (N) (or likewise just to the 3
> o'clock). Remeber, B is doing nothing so shouldn't be in the
> picture. It may just confuse things, so I took it out in the

second

> diagram below.
>
>
> Jeff
>
> > ........(A)
> > .........N.............
> > .......................
> > ..B......S........B....
> > .........|.............
> > .........|.............
> > s........x............N(A)
> > .........|.............
> > .........|.............
> > .........|.............
> > ...B.....N........B....
> > .......................
> > .........S.............
> >
> without the B it's eaiser to see that you now have two N poles. If
> both were energized(which they normally would be), then your S

would

> point to halfway between. If you take a stepper appart, you can

see

> that the two phases have different section on the rotor that they

act

> on, one offset from the other. Anyway, with S pointing to 1:30

now,

> swap polarities. You will then see that you can go clockwise, or
> counterclockwise to get to the proper place. Third (funky)diagram
> for 1:30 is below this one.
> > ........(A)
> > .........N.............
> > .......................
> > .........S.............
> > .........|.............
> > .........|.............
> > s........x............N(A)
> > .........|.............
> > .........|.............
> > .........|.............
> > .........N.............
> > .......................
> > .........S.............
>
> > ........(A)
> > .........N.............
> > .......................
> > ................S......
> > .........|..../........
> > .........|../..........
> > s........x/..........N(A)
> > ......./...............
> > ...../.................
> > ..../..................
> > .N.....................
> > .......................
> > .........S.............
>
> Jeff
> http://www.xylotex.com