Quote Originally Posted by ptjw7uk View Post
Hi All,
I am a little puzzled by some information on the web as to multi stepping and it has got me wondering as to the worth of it.
Are the muliti steps always the same ie is an 8th step equal to 0.225 degrees everytime (1/8 of 1.8 degrees) and is it reproducable.

Just wondering as I can see how a half step works but not multi(micro)step works.

peter
Yes. the reproducability is down to the motor to some extent. But microstepping is done in exactly the same way as 1/2 step... applying differential current to the opposing phase coils so that one coil is pulling the rotor forward and the other pulling it back. The resultant 'vector' is part way between two step locations. The current applied to each coil is a 'stepped sine wave'... here is a good tutorial on the subject.

HTH