suggestions for servo motor/

Started by Denis Palmans September 30, 2003
I'm looking for a suitable servo to use to operate a Throttle Body for a Car motor.
I'm not sure where to look to find a servo that I could use for this application, everything I seem to find is either too small and weak, or much to large.

It just needs to have a pretty good torque rating to operate the throttle valve on the throttle body itself, and hopefully operate directly on it so that it only needs to rotate about 1 revolution at most to open it completely.

Any suggestions?

-Denis
----- Original Message -----
From: Ken Arck
To:
Sent: Monday, September 08, 2003 10:33 PM
Subject: Re: [BasicX] a little transistor help At 05:26 AM 9/9/2003 -0000, you wrote:

A very simple problem but for some reason I can't get it. I'm
using 2n2222 transistors to switch 5VDC. The base is
connected through a 330ohm resistor to 3VDC that turns on and
off. For some reason the transistors won't put out more than
2.7VDC at the emitter regardless of the input voltageat the
collector. What am I doing wrong?

<---You're using the transistor as an emitter follower, which offers very
little gain. You'd be much better off connecting the base through a 4.7K
resistor, ground the emitter and switch your load via the collector. Of
course it will invert in this configuration but you'll take full advantage
of the gain of the transistor

What are you trying to do anyway? ------ http://www.ah6le.net
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--- Denis Palmans <> wrote:
> I'm looking for a suitable servo to use to operate a
> Throttle Body for a Car motor.
> I'm not sure where to look to find a servo that I
> could use for this application, everything I seem to
> find is either too small and weak, or much to large. > It just needs to have a pretty good torque rating to
> operate the throttle valve on the throttle body
> itself, and hopefully operate directly on it so that
> it only needs to rotate about 1 revolution at most
> to open it completely.
>
> Any suggestions?
>
> -Denis
> ----- Original Message -----
> From: Ken Arck
> To:
> Sent: Monday, September 08, 2003 10:33 PM
> Subject: Re: [BasicX] a little transistor help > At 05:26 AM 9/9/2003 -0000, you wrote:
>
> A very simple problem but for some reason I can't
> get it. I'm
> using 2n2222 transistors to switch 5VDC. The base
> is
> connected through a 330ohm resistor to 3VDC that
> turns on and
> off. For some reason the transistors won't put out
> more than
> 2.7VDC at the emitter regardless of the input
> voltageat the
> collector. What am I doing wrong?
>
> <---You're using the transistor as an emitter
> follower, which offers very
> little gain. You'd be much better off connecting
> the base through a 4.7K
> resistor, ground the emitter and switch your load
> via the collector. Of
> course it will invert in this configuration but
> you'll take full advantage
> of the gain of the transistor
>
> What are you trying to do anyway? >
>
------ > http://www.ah6le.net
> The RC-210 Repeater Controller is now shipping!
> For more information, please visit:
> http://www.ah6le.net/arcom/index.html
> AH6LE/R - IRLP Node 3000
> http://www.irlp.net
>
> Yahoo! Groups Sponsor >
> > [Non-text portions of this message have been
> removed]
>
> You might checkout All electronics web site and
jameco electronics. They have some variety of
dc motors. You can also cannablize inkjet
printers for some husky servo motors that have to
feed that paper through those rollers. I always
scavange these for drives and they use a high
resolution digital feedback sensor for that
resolution.
Thanks Bill. __________________________________



What about the servo motor in a cruise control actuator. Perhaps you
could find one cheap at a salvage yard.

joeo

Denis Palmans wrote:

>I'm looking for a suitable servo to use to operate a Throttle Body for a Car motor.
>I'm not sure where to look to find a servo that I could use for this application, everything I seem to find is either too small and weak, or much to large.
>
>It just needs to have a pretty good torque rating to operate the throttle valve on the throttle body itself, and hopefully operate directly on it so that it only needs to rotate about 1 revolution at most to open it completely.
>
>Any suggestions? >





Look to www.towerhobbies.com, and similar sites. They carry extensive
lines of the major manufacturers. These are model a/c servos,
however, and are not rated for reliable operation in the temperature
found under the hood of a car.

Looking for a cruise control actuator as Joe suggested sounds like a
good approach. --- In , Joseph Obernberger <joelori@e...> wrote:
> What about the servo motor in a cruise control actuator. Perhaps you
> could find one cheap at a salvage yard.
>
> joeo
>
> Denis Palmans wrote:
>
> >I'm looking for a suitable servo to use to operate a Throttle Body
for a Car motor.
> >I'm not sure where to look to find a servo that I could use for
this application, everything I seem to find is either too small and
weak, or much to large.
> >
> >It just needs to have a pretty good torque rating to operate the
throttle valve on the throttle body itself, and hopefully operate
directly on it so that it only needs to rotate about 1 revolution at
most to open it completely.
> >
> >Any suggestions?
> >
> >
> >