[robocup-small] DC Motor Type: success stories ??

[Anirudh Sivaraman]

Hi,

We haven't had great success in terms of cost too; but we thought the
FaulHaber 2232 fit our requirements ie size torque and rpm pretty
well. Including the gear head and encoder costs we got a quotation for
around 210 CHF. But FaulHaber's own drive is really costly ie around
380 CHF. So we are thinking of using LM 629 which is a standard motion
control chip and costs either 21 USD or 40 USD depeding on operating
frequency. The other option we are thinking of for the drive is the
PIC SERVO ( 30 USD ).

Does anyone know of cheaper options?

Regards
Anirudh

On Sun, Jul 6, 2008 at 8:04 AM, Zachary Noyes <znoyes at gmail.com> wrote:
> Hi robocup community,
>
> Our Team, University of Rochester Robotics, would like to use DC, rather
> than EC or flat motors. The reason being is that it is simpler to commutate
> a DC motor: less to go wrong, less overhead, etc. The tradeoffs are a larger
> size and less torque at that size. I am sure that all the teams have gone
> through the motor search to try to find the best motor (size, torque, and
> rpm's) for the best price (low). For anyone that has had overwhelming
> success in this search, what did you use.
>
> I am thinking about the Faulhabber 2224 motor: a commonly used robotics
> motor. However, the only link that I can find in a search says $224. We are
> looking more at the $ 50 - 80 range. Also, much of the Faulhabber website is
> in German and finding a price quote from Faulhabber is a pain.
>
> The other motor we had conciderred earlier was the Maxon EC 45 flat motor.
> While small and powerful, it requires either a $50 extra in cost just to get
> the chip that drives the motor or it takes a really smart engineer that can
> make the circuitry himself. We have the resources for neither.
>
> Your help is greatly appreciated and we hope to see you, the community, at
> our first robo cup competition next year.
>
> --Zach
>
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