Hey guys,
I have a similar issue. I use canakit H-bridge L298 (4A Dual Bi-Directional Motor Driver (L298 H-Bridge), btw. I also tried BigEasy driver, and it exploded... motors didn't even rotate once, and I had 3 of those. 2 exploded, and i keep the third one in the drawer), and NEMA23 stepper with a 4:1 gearbox. I know... these drivers aren't the best option, however, I will probably order something like: http://www.ebay.com/itm/130959628870. Anyway.... . I fitted large heat-sinks with fans to cool this down so overheat is handled. The thing works fine while using power supply (12V - max 15amp, converted PC PSU). However, if i connect it to 16V of 5000mAh 25C LiPo (Radio Control Planes, Drones, Cars, FPV, Quadcopters and more - Hobbyking)
Any idea? The stepper driver behaves very weird. Control leds are blinking very dimly. And the motor doesn't show any interest to run. However, when back on 12V PSU, works fine. What's the problem with LiPo? I also tried to fit 10ohm, 10w ressistor in series, however, the same thing repeats. Any ideas?
Thanks!