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In lugnet.org.ca.rtltoronto, Matthias Jetleb writes:
> While continuing to sort, I've ocasionally been distracting myself
> with other tasks. One of them was to try to build different castor
> designs. I'm not having much luck, except for one possibly quite
> unique design I'll bring to the next meeting. What I'm wondering is:
> can other people bring in some castor designs too? Most of mine suffer
> from too much friction when pivoting. I'd just like to see what others
> are using.
I always run into that problem too, Matt. Usually what I try to do is make
the vertical axis on which the castor pivots as tall as possible, so the
moment on the axle is reduced as much as possible (else it binds). I also
try to keep the castor wheel axis as reasonably close to the vertical axis
as possible; it reduces slewing when the vehicle tries to turn. Keeping it
close does, however, mean that it's going to spin around very quickly when
the robot changes direction, and that energy may not be available and
instead cause the castor to skid. There's a fine "tuning" point you have to
find based on the friction of the castor wheel and the friction in the axis.
Iain
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Message has 1 Reply:
 | | Re: Castors
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| I'm going to be in Montreal instead of Mel's. Go figure. But here's what I do: I put as much weight over the drive wheels as possible. This improves traction. I use a 2x2 round plate with the curved, smooth bottom, the one used on boats in Town. Or (...) (22 years ago, 12-Sep-02, to lugnet.org.ca.rtltoronto)
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Message is in Reply To:
| | Castors
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| While continuing to sort, I've ocasionally been distracting myself with other tasks. One of them was to try to build different castor designs. I'm not having much luck, except for one possibly quite unique design I'll bring to the next meeting. What (...) (22 years ago, 11-Sep-02, to lugnet.org.ca.rtltoronto)
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