Silent/Smooth Step Motors
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Hello to all.
is there a special category of step motors that produce very little
noise and vibration?
Do you know of any suppliers?
Is it safe to assume that the more steps the less vibration and noise?
Many thanks in advance and regards.
is there a special category of step motors that produce very little
noise and vibration?
Do you know of any suppliers?
Is it safe to assume that the more steps the less vibration and noise?
Many thanks in advance and regards.
Comments
>Hello to all.
>
>is there a special category of step motors that produce very little
>noise and vibration?
>
>Do you know of any suppliers?
>
>Is it safe to assume that the more steps the less vibration and noise?
That is quite true and micro-stepping the rotor should also provide quieter
operation. Another thing to consider is to use a slightly over-sized motor,
so it's well within the torque requirements you have and the motor's not
straining.
>Many thanks in advance and regards.
Bruce Bates
<proufo@c...> wrote:
> Hello to all.
>
> is there a special category of step motors that produce very little
> noise and vibration?
>
> Do you know of any suppliers?
>
> Is it safe to assume that the more steps the less vibration and
noise?
>
> Many thanks in advance and regards.
There is no special category, but there are other type motors. Servo
motors are just DC motors that can have a shaft encoder connected to
indicate shaft angle. DC motors can be much smoother than a stepper.
Also, as Bruce mentioned, the more 'steps' per rotation, the smoother
the motor.
A 400 step per rev motor will be smoother than a 200 step per rev(SPR)
Also, by charging two coils at the same time, one can half-step the
motor creating the effect of doubling the motor's natural step per
rev. Quarter stepping is also quite simple and quite common.
Once you get past quarter stepping, the term microstepping begins to
apply. (2oo SPR x half = 400 SPR or 22 x quarter=800SPR as you get
over 1,000 SPR, one adds the word micro-stepping)
Quarter stepping is not too hard to attain, but when you start
looking for higher accuracies, or higher amperage, considder getting
into dedicated chips for running the steppers.
Dave
<proufo@c...> wrote:
> Hello to all.
>
> is there a special category of step motors that produce very little
> noise and vibration?
Right now, I have about a dozen different "flavors" of stepper motors.
All are four phase, ranging in size from .25 x .75 inches, up
to...well...gimongous. They all "sing" or resonate. Some are quieter
than the others, but it's the nature of the beast. The harder and
faster you drive them the more thay sing. Driven slowly, they're
barely audible. But then the pulses become more noticable. So there's
a trade-off. Also, the faster you drive them, the less torque they
produce.
Depending on your requirements, you can canibalize nice steppers from
old floppy drives, that can ususlly be had for the asking. And if you
can't use them, send them to me. :-)
Stephen Weller
American. Veteran. Patriot.
> --- In basicstamps@yahoogroups.com, "Pablo Roufogalis L."
> Right now, I have about a dozen different "flavors" of stepper
motors.
> All are four phase, ranging in size from .25 x .75 inches, up
> to...well...gimongous. They all "sing" or resonate. Some are quieter
> than the others, but it's the nature of the beast. The harder and
> faster you drive them the more thay sing. Driven slowly, they're
> barely audible. But then the pulses become more noticable. So
there's
> a trade-off. Also, the faster you drive them, the less torque they
> produce.
Thanks Stephen.
I guess I'll make a provision in my design for an enclosure, in case
the noise turns out to be significant.
Thanks again.