What about multiple servos? 2 for each wheel or similar
On Oct 25, 8:29 pm, "Paul Hilton" <[email protected]> wrote:
> Run with it, Derek. We'll be watching...
>
> Paul H.
>
>
>
> ----- Original Message -----
> From: Derek Engelhaupt
> To: [email protected]
> Sent: Sunday, October 25, 2009 4:10 PM
> Subject: [TANKS] Re: Differentials
>
> Now that the family and I are back from the Caribbean, I can add my two
> cents. I bought a couple of riding scooter (type used for people that have
> difficulty walking) differentials to play with. They are a limited slip type
> with a single motor. They are heavy (15lbs/per differential), but I think
> the heaviness could aide in traction for a battle vehicle. I was going to
> play with a seesaw type of suspension and use two of them on a vehicle so I
> could get 4 wheel drive. I do agree that the complexity of the steering and
> suspension of a wheeled vehicle is more daunting that actually creating a
> tracked vehicle. In order to steer the vehicle, I would need to make one of
> those heavy duty steering servos using a geared motor and a standard r/c
> servo. Building a wheeled vehicle is pretty low on my list of projects
> though.
>
> Derek
> T065
>
> On Wed, Oct 21, 2009 at 10:02 AM, Doug Conn <[email protected]> wrote:
>
> We talked about self-propelled lawnmower differentials like the ones they
> sell at Surplus Center. It turns out that they cannot go in reverse with some
> mechanical modifications.
>
> - Doug
>
> From: [email protected]
> [mailto:[email protected]] On Behalf Of mac wynkoop
> Sent: Tuesday, October 20, 2009 6:25 PM
> To: [email protected]
> Subject: [TANKS] Re: Differentials
>
> Well, not too long ago I saw a differential on my neighbor's
> self-propelled lawn mower. It looked like it would fit a tank perfectly.
> Maybe I should ask him if he wouldn't mind pushing it again...
>
> On Tue, Oct 20, 2009 at 12:26 PM, Steve Tyng <[email protected]> wrote:
>
> I have given the subject of differentials in a 1:6 scale r/c combat
> vehicles some thought over the years. At one point I was interested
> in building an armored car (AC) and may still do so. I looked at the
> various differentials currently available and have yet to find one
> that I feel is appropriate for our vehicles. On the heavy end are the
> differentials built for go-karts. These are to large for a typical
> 1:6 scale AC and have monster 3/4" or 1" output shafts. On the other
> end of the spectrum are the hobby differentials produced for "monster"
> scale r/c trucks. I've looked at these and weren't impressed with
> there robustness and many plastic parts. I have seen references to
> differentials for 1/4 scale r/c sand buggy's that sounded good but
> they were on a German site with little info and the pricing looked to
> be exorbitant. IMO the best option will be a dual motor setup (or
> quad motors for 4wd) driven from one speed controller. This
> "electronic" differential provides the same functionality as a
> mechanical one in that it provides varying power to the left or right
> drive wheels depending on load. It can be built as robust as required
> much as we build our drive-trains currently. The issue will be
> finding the appropriate motors for such a scheme. The motors will
> need to be relatively powerful and small to fit into the smaller
> chassis. For this all we need to do is look to the new electric
> skateboard sport where small high-powered motors of up to 600 watts
> can be found. While on Allellectonics.com the other day I noted a
> nice 135 watt motor that that I have seen used on electric skateboards
> and may prove to be ideal for the smaller wheeled r/c combat vehicle.
>
> http://www.allelectronics.com/make-a-store/item/DCM-130/24VDC-135W-MO...
>
> If I were to start building an AC tomorrow I'd get two of these motors
> and a single reversing scooter controller and design an AC around
> that.
>
> Steve Tyng
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