[PD] arduino-help.me.please.pd [gadlletas]

[Christian Klippel]

hello,

servo's are _slightly_ different in that they dont take the classical pwm that 
you can regulate from 0..100%.

instead, a servo needs a repetetive pulse between 1 and 2 miliseconds.
that pulse train can have a frequency from 30 to 400 hz, for example, but the 
pulse width stays in the same range. a pulse of 1.5 ms positions the servo 
into the center, 1 and 2 ms are for the full movement to the left or right 
respectively.

in the controller you need a loop (or, preferably, an interrupt) that just 
waits some 20 ms, then sets the pulse on, waits 1 to 2 ms, and turns off 
again, then repeat ....

greets,

chris


Am Montag, 29. Mai 2006 13:59 schrieb nomeparece:
> On May 29, 2006, at 11:43 AM, Hans-Christoph Steiner wrote:
> > I don't recall the exact specs for even a plain servo.  It will
> > make your life much easier if you have a reference to what kind of
> > signal you are trying to send it.  It should be quite easy to find,
> > just search the interweb using the manufacturer and part number, or
> > maybe even more generic info would work.
>
> you are right! thing is that..as said, me (a plain user) will like to
> be able to move the little motor either via [PWM] or just any of the
> digital pins.. but unfortunately from my user level capacity this
> doesnt seem to be easy, thought i keep the hope that its just my
> blindness and lack of understanding of what the patch is doing...
> reason why im so grateful to all you people out there openly
> discussing about similar issues. :)
>
> this are the specs taken from the interweb:
>
> Abm.:   (L x B x H) 23.7 x 12.8 x 22.5 mm
> Gewicht:  8 g
> Stell-Moment bei 4,8 V:  10 Ncm
> Stell-Zeit bei 4,8 V:  0.17 s
> Getriebe:  Kunststoff
> Stell-Zeit bei 6 V:  0.15 s
> Typ: 	8
> Stell-Moment bei 6 V: 	12 Ncm
> Steck-System: 	Futaba
>
> a pdf here: http://www.produktinfo.conrad.com/datenblaetter/
> 225000-249999/230501-da-01-en-TopLine_Mini-Servo_ES-05_FUT.pdf
>
> an image here: http://www1.conrad.de/m/
> 2000_2999/2300/2300/2305/230500_RB_00_FB.EPS.jpg
>
> Tx for the help, again
> /a
>
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