if it can light up one Ld , it will be enough for me. i know all the other motors can be used as generator, but i really need this one to do it.

 

You need to unsolder the wires from the circuit board to test.
Then you need to connect one pair of wires to the input of an oscilloscope to view the waveform.

i dont have the osciloscope, all i have from the equpmenti is amp/ voltmeter.

 

Well then you're stuck. Borrow a scope if you can.
If you are generating mV it would be difficult to fully understand what is going on without a scope.
With multiple windings you want to be able to see the phase relationship between windings. You cannot see that with a voltmeter.

 

if it can light up one Ld , it will be enough for me. i know all the other motors can be used as generator, but i really need this one to do it.

Not following the fixation with this motor? Anything special about it being the main capstan motor and the tape eject drives are way more powerful motors to work with in respects to trying to generate power with.

After doing a quick search for VCR motor generator plans I do not see a single one that uses the tape head motor. Everything I found is using the either the main drive motor or the tape eject motors as generators and even then they are barely able to light up more than a LED or two.

 

I'm more and more into giving up on it. this one looked good because of the size , bearings and it's easy to spin.. and all the other things i can't explain in english . . i just needed it to give me something and it sucks. haha. Maybe i will try to replace the coils and install brushes and stronger magnets on it. seems like the only way to get thos one generate .

 

i dont have the osciloscope, all i have from the equpmenti is amp/ voltmeter.

One simple way to see how much the motor is capable of generating is to short all output wires together and give it a hard spin, the greater the resistance the greater the generation.
Max.

 

Why is that funny?

A VCR motor was designed to spin a VCR recording/playback head in a VCR, not to generate electricity.

funny is that i have coils and magnets perfectly spaced between each other , on a wheel that is perfectly balanced and perfectly perfect and i have 4 wires coimng out of the coils and I can't make it generate anything , not even a little bit of that inefficient electricity.

 

One simple way to see how much the motor is capable of generating is to short all output wires together and give it a hard spin, the greater the resistance the greater the generation.
Max.

did that, not showing any resistance.

 

I know it generates something since there are magnets spinning around coils. but where to connect the leads of voltmeter or a consumer , to get that generated el. out.

 

Right at the output of coils themselves normally, individually or collectively.
Max.

 

yup, that is the problem. nothing comes out.

 

i took it appart and found out the inside of this one is completely different than the first one I messed up. it has air coils instead of solid ones, and magnet is spinning above them instead around them like on the first one. how much this effects the efficiency ? i will send picture in a minute.

 

 

haha.. ok i also found out that those 4 wires are not coming out of the coils at all. i will now solder the wires coming from the coils to see what happens. thank you all for your time. i ill come back again to bother you little bit more.

 

i ill come back again to bother you little bit more.

Don't make me come over there!!
Max.

 

found the exits finnaly.. damn.. it works. was losing hope this can work at all. one more thing, what you think which coil seting should be more eficient ? this one i sent now or the one before ?

 

haha.. ok i also found out that those 4 wires are not coming out of the coils at all. i will now solder the wires coming from the coils to see what happens. thank you all for your time. i ill come back again to bother you little bit more.

54 posts and how many weeks to get to the point of figuring that out.

I think you are related to my wife and my head hurts now.

 

hahah, i know what you mean. but it's high speeds fault . hand couldn't do it no matter how hard i spin , i spin it with a rope and it light a led.

 

Practically all P.M. motors will generate if spun, voltage directly relative to rpm.
Max.

As long as you avoid the ones with onboard drive electronics, still - probably not too difficult to isolate the tails from the stator windings.

If its driven by a separate PCB, it should be easy, but the older ones have extra connections for hall effect position sensors that make tracing out more fun.

 

idk if i'm clumsy like Teh's wife , but i just dropped this motor and broke this board that is left for connect ...