Servo''s (Slightly off topic)
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Posts: 46,084
Thanks,
Phil
--- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> As long as the pulses are supplied and the servo has moved to where
its
> supposed to be, it will "hold" the position -- ie the motor will
try to
> prevent the servo from being turned by an outside force. If you
stop sending
> pulses, the servo will still stay where its at, but an outside
force can
> easily rotate the servo, just like if the power is off.
>
>
Original Message
>
> > I understand, or at least think I do, how a Servo operates. If
I
> > provide a control signal with a positive pulse of 1.5uS the Servo
will
> > center its self. If I provide a 1uS pulse it will drive to
> > approximately -90 degrees and if I apply a 2uS pulse it will go to
> > +90.
> >
> > Now, what if I apply a 1uSec pulse train for some period of time
> > (greater than the time required to get into the proper position)
and
> > then remove the pulses? Will the Servo hold its last position,
this
> > is what I would expect, or will it drive to some other position
since
> > it is no longer receiving the control signal? Assuming that I
keep
> > power applied to the device. [noparse];)[/noparse] What will a Servo do when power
is
> > first applied and the control signal is DC to ground?
Phil
--- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> As long as the pulses are supplied and the servo has moved to where
its
> supposed to be, it will "hold" the position -- ie the motor will
try to
> prevent the servo from being turned by an outside force. If you
stop sending
> pulses, the servo will still stay where its at, but an outside
force can
> easily rotate the servo, just like if the power is off.
>
>
Original Message
>
> > I understand, or at least think I do, how a Servo operates. If
I
> > provide a control signal with a positive pulse of 1.5uS the Servo
will
> > center its self. If I provide a 1uS pulse it will drive to
> > approximately -90 degrees and if I apply a 2uS pulse it will go to
> > +90.
> >
> > Now, what if I apply a 1uSec pulse train for some period of time
> > (greater than the time required to get into the proper position)
and
> > then remove the pulses? Will the Servo hold its last position,
this
> > is what I would expect, or will it drive to some other position
since
> > it is no longer receiving the control signal? Assuming that I
keep
> > power applied to the device. [noparse];)[/noparse] What will a Servo do when power
is
> > first applied and the control signal is DC to ground?