I have a stepper motor with the following specs: 1.8deg 24V 2A. I would like to drive it using the arduino and the easydriver v3. I understand that the easydriver is rated to deliver 30 V and .75 amps. I believe I can still use the easydriver at 30V and .75 amps. I will loose some torque but it should be possible.
My questions are 1.) What about heat? Will the easydriver be able to dissipate that much power. 2.) Is there a better way to do this? Another driver circuit capable of microstepping?
If your motor is rated at 2A, then it will try to draw that much from a 24V supply. If the driver board is rated at a maximum of 0.75A, then it'll fail when driving your motor. So,
No, the easydriver will let out the magic smoke.
Yes, try using a bigger motor driver, one that's rated at about 3A or maybe a little more.
Sorry I forgot to explain what the easydriver is. The easydriver is a stepper motor driver/ chopper circuit (i.e. it limits the current to the coil). So in practice if you had a 12V motor that ran at .3 A you could run it at 24V at .15 A. (P=IV) and get a lot more torque out of it.
So my question is what would be the affect of running the motor at 30V and .75 amps? When it should be ran at 1.6 amps? I increase the voltage which should increase the efficiency but I decrease the current which should give me less power. What's the net affect? (That actually wasn't one of the questions but we'll add it as 3 now)
So what happens to the other .9 A? It is dissipated as heat. The A3967 does have a thermal cut off but can the heat sink on the easydriver dissipate this much heat, or well I be plagued by shutdowns? (that was question 1). question 2.) was do you have any suggestions for other drivers like the l297/298 reprap driver?