Hi,
I got my mill 80% done, the controler based on UCN5804 is completed (1.5A) AND my power-drivers board is almost done (4A). Still, I worry about plugging the good motors in and Poof...
I tested the boards with 12v motors on 12v, using about 300ma MAX so the allegro chips did'nt heat and the driver board neither... Nice to see all works fine...
Now, what will happen when I plug my 3v motors to my 5v power source (for a start)? I know I need to put a resistor, could someone confirm my understanding?
Motors are 3v, 3.5 Ohms, SO, current should be v/r=I so 3 / 3.5 = .86 Amps per phase? But then I use the resistor calculator and it tells me I need 2.2 amps per motors... does'nt sound right to me...
A single unipolar motor (6 or 8 wires) is 4 phases right? So I should be more on the 3.4 amps or so... how-come the difference? I tried the calculation at 3v ps but no difference.
The mill is about to be wired so I would really appreciate to clear that detail now...
Thanks in advance for your help
Para