两相四线的步进电机，有两个绕组：A，B。

A绕组通正向电流用(+A)表示；通反向电流用(-A)表示。

B绕组表示方法同上。

同电次序：

两相，四拍：(+A)(+B)--(-A)(+B)--(-A)(-B)--(+A)(-B)-- xxxx 1010 0110 0101 1001

单相，四拍：(+A)--(+B)--(-A)--(-B)--

0x02,0x04,0x01,0x08

八拍，半步：(+A)(+B)--(+B)--(-A)(+B)--(-A)--(-A)(-B)--(-B)--(+A)(-B)--(+A)--

-Two-phase four-wire stepper motor has two windings: A, B,. A winding through the forward current (+A) said　reverse current (-A) said. B winding, said method as above. Order with the power: the two-phase, four beats: (+A) (+B)- (-A) (+B)- (-A) (-B)- (the+A) (-B)- xxxx 1010 0110 0101 1001 single-phase, four beats: (+A)- (+B)- (-A)- (-B)- 0x02, 0x04, 0x01, 0x08 eight shot, half-step: (+A) (+B)- (+B)- (-A) (+B)- (-A)- (-A) (-B)- (-B)- (+A) (-B)- (+A)-