Hi,
think there are some advantages of using the mcu / arduino for that matter as the motor driver. the idea is that L293D and L298 are high current devices that does the motor control,
- What are the specs of your stepper motors, Please.
- What voltage are you using to drive them?
- Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?
- What do you consider high current?
293 and 298 are 2A each side.
Tom... 