A few days back I made the assertion that the windings in a unipolar
motor were made in one direction to the centre-tap and then in the
opposite direction for the rest of the winding and therefore, using
the whole winding in a bipolar fashion would result in flux
cancellation.
This is incorrect. The winding continues in the same direction making
one appear reversed when viewed from the centre-tap (as it is used in
a unipolar drive).
Sorry if I added any further confusion with my brain fart.

Steve.

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Steve Baldwin                Electronic Product Design
TLA Microsystems Ltd         Microcontroller Specialists
PO Box 15-680, New Lynn      http://www.tla.co.nz
Auckland, New Zealand        ph  +64 9 820-2221
email: steveb@tla.co.nz      fax +64 9 820-1929
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