Thanks for the suggestions!. It worked out

Sai


----- Original Message -----
From: Bob Ammerman <picram@roadrunner.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
Cc:=20
Sent: Friday, February 10, 2012 10:54 AM
Subject: Re: [PIC] Servo motor speed control using PIC12F675

You will have to change the pulse width gradually to move from end-to-end a=
t=20
a given rate.

If you just change the pulse width instantly the servo will operate at max=
=20
speed to the new position.

-- Bob Ammerman
RAm Systems

----- Original Message -----=20
From: "Tamas Rudnai" <tamas.rudnai@gmail.com>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Friday, February 10, 2012 9:52 AM
Subject: Re: [PIC] Servo motor speed control using PIC12F675


> You need to introduce a variable for the delay for this, and slowly
> increase/decrease it as needed and feed your control loop with that.
>
> And because of this you need a higher resolution of delay than the
> __delay_ms() function. I have suggested this only for testing purposes.
>
> if(GPIO & (1<<3))
> {
>=A0 =A0 inc =3D 1;
> }
> else
> {
>=A0 =A0 inc =3D -1;
> }
>
> // add the increment here
> towait +=3D inc;
> // make sure you are limiting the value
> if ( towait < 1000) towait =3D 1000;
> if ( towait > 2000) towait =3D 2000;
>
> GPIO |=3D(1<<2);
> __delay_us(towait);
> GPIO &=3D~(1<<2);
>
> Something like that... If you need even more resolution then you might=20
> need
> to calculate with floats...
>
> Tamas
>
>
>
> On 10 February 2012 14:08, yamanoor sairam <yamanoorsai@yahoo.com> wrote:
>
>> Hello All,
>> I am controlling a servo motor using the PIC12F675. The servo rotates in
>> opposite directions. I am controlling the servo as follows:
>>
>>
>> if(GPIO & (1<<3))
>> {
>> GPIO |=3D(1<<2);
>>=A0 __delay_ms(1);
>>=A0 GPIO &=3D~(1<<2);
>> }
>>=A0 else
>> {
>>=A0 GPIO |=3D(1<<2);
>>=A0 __delay_ms(2);
>>=A0 GPIO &=3D~(1<<2);
>>=A0 }
>>=A0 __delay_ms(18);
>> I would like to control the rate at which the servo reaches the opposite
>> ends. I tried looking for articles related to speed control, I found it=
=20
>> to
>> be too complicated to control the rate of sweep. I am looking for
>> suggestions for the same. Increasing the delay=A0 did not help me contro=
l=20
>> the
>> speeds. I am planning to control the speed using a potentiometer. Any
>> suggestions would be helpful.
>>
>> Sai
>>
>> --
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>>
>
>
>
> --=20
> int main() { char *a,*s,*q; printf(s=3D"int main() { char *a,*s,*q;
> printf(s=3D%s%s%s, q=3D%s%s%s%s,s,q,q,a=3D%s%s%s%s,q,q,q,a,a,q); }",
> q=3D"\"",s,q,q,a=3D"\\",q,q,q,a,a,q); }
> --=20
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist=20

--=20
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