ok i maybe fixed it.
i reloaded the sprinter firmware( at first it didn`t compile but with this link it worked on the newer arduino ide version click!
after updatig the firmware the motors move both ways.
for now...
i reloaded the sprinter firmware( at first it didn`t compile but with this link it worked on the newer arduino ide version click!
after updatig the firmware the motors move both ways.
for now...