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# what happens when you put 12v into a 24v stepper motor?

J

#### Jack Snodgrass

Jan 1, 1970
0
This may be a dumb question, but if I have a stepper motor that says
it is 24 volts.... will it work ( slow is ok ) if I only apply 12 volts
to the coils? I only need about 270 deg of rotation from it and I will
drive it fairly slowly ( in case that matters )

Thanks - jack

R

#### Russell Miller

Jan 1, 1970
0
Jack said:
This may be a dumb question, but if I have a stepper motor that says
it is 24 volts.... will it work ( slow is ok ) if I only apply 12 volts
to the coils? I only need about 270 deg of rotation from it and I will
drive it fairly slowly ( in case that matters )

Thanks - jack

My impression is that you will get much less power out of it. It may barely
move at all. But the speed shouldn't be impacted if you can get it to
move, as the stepper motor is designed to move a specific amount with one
pulse.

--Russell

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#### John Popelish

Jan 1, 1970
0
Jack said:
This may be a dumb question, but if I have a stepper motor that says
it is 24 volts.... will it work ( slow is ok ) if I only apply 12 volts
to the coils? I only need about 270 deg of rotation from it and I will
drive it fairly slowly ( in case that matters )

Thanks - jack

It will produce half (or a little less) of rated torque, and the
maximum speed will be quite slow. Dozens of steps per second,
perhaps. It will also pass only about half of its rated current, and
run quite cool.

#### tag16c

Jul 24, 2009
3
Half the torque?

It will produce half (or a little less) of rated torque, and the
maximum speed will be quite slow. Dozens of steps per second,
perhaps. It will also pass only about half of its rated current, and
run quite cool.

--
John Popelish[/QUOTE]

I think you will find the torque is 1/4 of rated torque.
The work is V^2/R so half the voltage gives 1/4 the torque.

#### shrtrnd

Jan 15, 2010
3,826
Try it and find out.
Motor might draw more current from a 12v supply than what the 12v supply is spec'd to?