Hi guys, I have a couple of (dumb) questions for you.
I bought an Arduino UNO few days ago and I'm not exactly an electronics guru, but I managed to make it communicate with Processing building a simple mouse controlled plotter-like-thing with two servos.
Now I feel ready to make the step into accuracy ;) and other desired characteristics by using stepper motors instead. I read some material but I'm still a little confused and in particular:
- what exactly should I look at to prefer an unipolar to a bipolar type of motor (or vv)?
- supposing I made up my mind, what kind of driver you'd suggest?
I saw there are several alternatives, from a shield (eg. the adafruit motorshield) to a couple of Easydriver (at spankfun), to a handful of ICs (eg. SN754410 or U2004). Since the cost variance for these configurations is in the order of tenth, I wonder what is the substantial difference because, as far as I can see, they look like doing the same thing.
So in the end, what's your advice? What kind of motor and configuration? what do you use in your applications?
Please also consider that my objectives for now are (strictly in order of importance):
- try not to screw up (eg. burning my board, because that seems a frightfully common mistake dealing with steppers)
- try to learn something while obtaining good results
- try not to buy useless stuff
Thanks a lot!