Homebrew PCBs

it is pure phase step mode 
a  a- b  b-
0  0  0  1
0  0  1  0
0  1  0  0
1  0  0  0 
full step mode 
i think you could put a l297 translator in front for step/dir and 
full/half step mode
http://www.allelectronics.com/spec/L297.pdf

gr. Roel 
--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan 
<stefan_trethan@g...> wrote:
> 
> > And look on the net for drivers.
> >
> > the linistepper seems a board that fits our group nicely.
> > also, check the Allegro A3977 chip.  very simple.
> >
> > Dave
> >
> 
> I will not buy a kit/module for stepper control!
> 
> But i would have these four STK6982 Drivers...
> They must be suited to drive these motors (they did it before).
> Unfortunately they are a bit old... and the only datasheet i get is 
> japanese...
> 
> They have current limit, and high drive voltage.
> 
> I just found the second pritner control board..
> on this board the 2 drivers are still in place (i took parts from 
the 
> other).
> 
> the rest of the circuit is intact..
> 
> i hope to be able with the pictures in the japanese datasheet and 
this pcb 
> to find out more...
> i have a pinout too...
> 
> But i have still no idea if they are chopper mode, or not..
> (there are strange pictures in the datasheet...)
> 
> If you want to take a look...
> http://service.semic.sanyo.co.jp/semi/dis_pdf_j/STK6982.pdf
> 
> prepare your japanese reading ;-)
> 
> 
> I read the jones document again, decided microstepping is not 
needed now...
> 
> but high voltage drive is needed, thus current limit required.
> I don't insist on chopper....
> 
> 
> stefan