(Topic ID: 261154)

Do motors have polarity?

By EvanDickson

4 years ago


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  • 13 posts
  • 7 Pinsiders participating
  • Latest reply 4 years ago by underlord
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#1 4 years ago

I accidentally yanked the wires off the motor for my TAF thing. I suspect DC must have polarity, but there are no markings on the motor, and the TAF manual has no detail on the motor / gearbox assembly anyways.

Does it matter which wire goes on which lug?
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#2 4 years ago

My guess is that if you connect it the wrong way it will spin in the opposite direction. I'm sure others will give you the correct answer.

#3 4 years ago

Polarity controls motor direction on that unit. You’ll find out soon enough.

#4 4 years ago
Quoted from underlord:

Polarity controls motor direction on that unit. You’ll find out soon enough.

Hehe. Ok, so 50% chance it works right. If it doesn't, then turn it off quickly...

#5 4 years ago
Quoted from EvanDickson:

Hehe. Ok, so 50% chance it works right. If it doesn't, then turn it off quickly...

Bingo.
If I had TAF I’d send a pic. Those wires look trained to direction. Maybe a clue?

#6 4 years ago
Quoted from EvanDickson:

Hehe. Ok, so 50% chance it works right. If it doesn't, then turn it off quickly...

Can you power the motor without connecting to the game. That will give you direction. What voltage does the motor run on?

#7 4 years ago

Perminate magnet DC motors yes. Wound field DC motors No.

#8 4 years ago

DC motors are polarized and timed in some cases. when the motor is timed anything other than zero it will turn higher rpm or torque with positive polarity and lower rpm or torque with polarity reversed

probably safe to power it with a 9 in short bursts to determine polarity

#9 4 years ago

Looks like gray/yellow on left,

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#10 4 years ago

Got it the right way on the first guess.

Thanks y'all.

#11 4 years ago

It'll spin the opposite way if connected wrong and then blow a fuse on your board. I had the same mistake once.

#12 4 years ago
Quoted from nikpinball:

It'll spin the opposite way if connected wrong and then blow a fuse on your board. I had the same mistake once.

Once.

#13 4 years ago
Quoted from EvanDickson:

Got it the right way on the first guess.
Thanks y'all.

No fires, no one died...

My work here is done.

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