Ok...
After an evening doing tests I can safely say that I don't understand. I've tested X,Y and E motors and they work with a pololu driver, supplying 12V. I tried the Z motors, and they didn't move. I have found that their wiring is different, because (possibly) they are different motors. I have then connected them in series and tested them once again, and they started working. So I suppose the problem was the current.
Now I'm facing another issue. Note that all of this I have done it without the printer being assembled, just with a multimeter and an old Arduino UNO with some sketches I made appositely. Since I had decided that I was doing a full system checkup, I tested the other pololu drivers. All dead. And this I can't understand: when I received the new board, and connected it, everything seemed to work fine, except for the Z axis. X and Y were definitely working. Then something weird happened, but X and Y still worked. That's when I decided to do the checkup. And now they don't work anymore. At least, the drivers. Luckily I have a few more of them lying around from the previous boards, so I'll be using them. But I don't understand why they wouldn't work.
Sooo... Do you think the problem was the Z axis? I mean, the origin of all problems? Would I be safe to put the printer back together? Or do you think there's something else that I need to check before? Right now I know that the endstops, the thermistors, and the motors are working. I have no way of testing the heaters and fans, but I don't suppose they would be the problem, right? Am I missing something?
Thanks again for helping me through this...
After an evening doing tests I can safely say that I don't understand. I've tested X,Y and E motors and they work with a pololu driver, supplying 12V. I tried the Z motors, and they didn't move. I have found that their wiring is different, because (possibly) they are different motors. I have then connected them in series and tested them once again, and they started working. So I suppose the problem was the current.
Now I'm facing another issue. Note that all of this I have done it without the printer being assembled, just with a multimeter and an old Arduino UNO with some sketches I made appositely. Since I had decided that I was doing a full system checkup, I tested the other pololu drivers. All dead. And this I can't understand: when I received the new board, and connected it, everything seemed to work fine, except for the Z axis. X and Y were definitely working. Then something weird happened, but X and Y still worked. That's when I decided to do the checkup. And now they don't work anymore. At least, the drivers. Luckily I have a few more of them lying around from the previous boards, so I'll be using them. But I don't understand why they wouldn't work.
Sooo... Do you think the problem was the Z axis? I mean, the origin of all problems? Would I be safe to put the printer back together? Or do you think there's something else that I need to check before? Right now I know that the endstops, the thermistors, and the motors are working. I have no way of testing the heaters and fans, but I don't suppose they would be the problem, right? Am I missing something?
Thanks again for helping me through this...