Servo voltage questions

Archiver

Would upping the voltage from 4.8 to 6 to 7.2 yield a noticable
increase in speed of the servo?
I take it a servo wouldn't be able to take much more than 7.2, if
that...
I'm using the parallax continuous servos.

Archiver

For several months now I have been running my BOE-BOT on a Radio
Shack 7.2V 2AH battery pack used in RC models. The servos do turn a
little faster but other than that I have had no adverse effects.

Hal


--- In basicstamps@yahoogroups.com, "justin21885" <justin21885@y...>
wrote:
> Would upping the voltage from 4.8 to 6 to 7.2 yield a noticable
> increase in speed of the servo?
> I take it a servo wouldn't be able to take much more than 7.2, if
> that...
> I'm using the parallax continuous servos.

Archiver

At 06:40 AM 3/12/03 +0000, justin21885 wrote:
>Would upping the voltage from 4.8 to 6 to 7.2 yield a noticable
>increase in speed of the servo?

Yes - if it survives that voltage.

dwayne

--
Dwayne Reid <dwayner@p...>
Trinity Electronics Systems Ltd Edmonton, AB, CANADA
(780) 489-3199 voice (780) 487-6397 fax

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Archiver

>Would upping the voltage from 4.8 to 6 to 7.2 yield a noticable
>increase in speed of the servo?
>I take it a servo wouldn't be able to take much more than 7.2, if
>that...
>I'm using the parallax continuous servos.

As several of you have replied, this is possible, but it seems to
be questionable if upping the voltage will or will not harm the servo.
The answer eventually would be yes, more voltage = more wear and tear,
electronics, gears, etc.

There is however a method that I have used before that will at least
preserve the electronics of the servo, not necessarily the motor.

High Power Driver - Servo Motor:
http://www.angelfire.com/wizard/y2kbc/schematic/hpd_sm.gif

Here is a view of a similar modification, recycling the driver electronics
in an old SERVO to be used as an ESC (Electronic Speed Control) for a much
more robust motor. This modification was also done for the steering on the
same remote control car by using the existing steering gearbox and coupling
a feedback potentiometer to the gearbox.
http://www.angelfire.com/wizard/y2kbc/schematic/car-hack.jpg

Archiver

since most servos are based on a ttl driver chip
i would'nt go above the normal 5 volt supply level.

--- Dwayne Reid <dwayner@p...> wrote:
> At 06:40 AM 3/12/03 +0000, justin21885 wrote:
> >Would upping the voltage from 4.8 to 6 to 7.2 yield
> a noticable
> >increase in speed of the servo?
>
> Yes - if it survives that voltage.
>
> dwayne
>
> --
> Dwayne Reid <dwayner@p...>
> Trinity Electronics Systems Ltd Edmonton, AB,
> CANADA
> (780) 489-3199 voice (780) 487-6397 fax
>
> Celebrating 19 years of Engineering Innovation (1984
> - 2003)
> .-. .-. .-. .-. .-. .-. .-. .-.
> .-. .-
> `-' `-' `-' `-' `-' `-' `-' `-'
> `-'
> Do NOT send unsolicited commercial email to this
> email address.
> This message neither grants consent to receive
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> commercial email nor is intended to solicit
> commercial email.
>
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