I have a small 12v motor with three slots (three coils) that a coil had burned and because of getting distracted, I started winding it again. I know that a coil measures 5 ohms and has about 200 turns as it was difficult for me to count them. Once the three coils have been removed and with a wire very similar to the one I had, I calculate about 32 or 33 caliber, there must be more or less walking, I have measured a length of 7 meters which is what gives me the 5 ohms, so I have 3 wires of 7 m. of length. The first coil rolled up and there is no problem, I have counted 170 laps and now the problem is coming. When winding the second one a few times I do not reach 170 laps and sometimes it happened to me, it is impossible to get the same number of laps with the same length of wire and this is my question. What predominates, turns or length? With the length I know that I get 5 ohms of resistance but nothing to do with the turns. It goes without saying that I have no idea about this, but if I would like your opinions, I'm sure I learn something from them. Already in advance thank you all. In case it works, the motor is brushed and no bigger than a lighter.