Ok basicly the harddrive motor i have has 4 contacts... I attached 2 wires to the most likely contacts i thought would make it spin but all it does is spin for like 2-3 seconds then it stops?? How can i make the motor spin? INeed it for a project because of its high rpm.
Unless you want to spend a couple of months learning about velocity control feedback systems and how to drive multiphase motors, forget about using a hard-drive motor. Find something else to drive your project. Doug
mine has four contacts also and it says on the little label that it starts on a certain voltage. maybe you don't have enough? maybe there are four contacts for two coils inside and maybe it can't run off of just normal voltage but maybe two phase?? just a guess.
There are several types of motors. Torque motor, induction motor, stepping motor… That one is a stepping motor. You will learn how it works here www.google.ca/search?hl=enq=how+... It’s a bit complicated, not for beginners. But if the PCB is still alive, it may still work. It needs +12V and +5V, and they don’t spin very fast in that application. I would suggest you go to an electronic store (surplus is best) or model shop like air plane or cars models, they have a variety or small DC motors, radio-shack… Much, much easier to get to operate. Hope this properly answers your question
It doesn't work like that! Any motor needs the current in the coil to be reversed so the magnetic fields of the armature and stator stop attracting and start repelling. In an AC motor, this is done by the supply current changing direction. In a simple DC motor, this is taken care of by the commutator -- a set of contacts on the armature. There is *no* commutator in a hard drive motor. It's sort-of inside out, with the coil on the stator and the armature is a permanent magnet. There is also a fixed sensor which detects the magnet moving past it. The direction of the current is switched electronically using 4 transistors in a bridge arrangement. To make the motor spin, you have to build a circuit which reverses the current in the coil depending on what the sensor is seeing (and there are a few different types of position sensor). I would seriously advise you to find a different type of motor to use.
