hi
i make drive with l297 and l6203

and it wrok for stepping motor but the motor get hot i measure current that in to drive surprise i found it 8A.

i shut down it quickely and make new driver and new ic l6203

but i found that current limit doesn`t work.

when i short vref to ground the current still high ,even if the motor can spin but get hot.

the question is how can i reduce the current??

i think vref ,sens and control pins in l297 are useless