Subject:
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Re: 3 segments hexapod
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Newsgroups:
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lugnet.technic
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Date:
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Sat, 24 Dec 2005 22:53:09 GMT
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Viewed:
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4879 times
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In lugnet.technic, Sigurd van Strakenburg wrote:
(SNIP)
> steering whit a midstop
> don't work so i did not bother hooking it up.
>
> http://www.brickshelf.com/cgi-bin/gallery.cgi?f=157060
>
> please let my no what you think of it :)
>
> sigurd
Hi Sigurd,
Would it help your mid-stop steering if you spaced the axle joints of the outer
mid-stop valve switch levers further apart (reducing their angles relative to
the centre switch)?
With the same spacing of the valves along the beam, I have the levers spaced
apart with a 1x4 brick with holes:
http://www.brickshelf.com/gallery/mbellis/Technic/Pneumatics/Trinary-Logic-System/cascaded_trinary_logic_evo1_zoom.jpg
See the right of the picture, behind the axle joints, that the distance between
the black 3L pins in the outer two valve switch axle joints is 4L, with the pins
having the slightly narrower end touching the brick. The slightly wider end is
above the axle joint. The difference in these two distances can be critical in
order for mid-stop steering to work.
I used 2L liftarms and cams to make the 1x4 brick with holes move in a
parallelogram along the beam, moving with the centre valve switch, rather than
the brick rotating around the pivot of that switch as your 24mm pulley does.
Sorry it's a bit difficult to see!
Nice robot!
Mark
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Message has 1 Reply:
 | | Re: 3 segments hexapod
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| Hi Mark, (...) the problem is not the mid-stop system, but the hexapod dont turn as i expected (it don't turn at all) when it's body is curved. (...) thanks anyway, your midstop system looks impresive!!! (...) thanks :) (...) Sigurd (18 years ago, 10-Jan-06, to lugnet.technic)
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Message is in Reply To:
| | 3 segments hexapod
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| oke another hexapod, this one is made whit inspirations of Kevin L. Clague (e-mails) it uses the schema from his inchworm for leg lift and drop, and the leg swap is just slave of the lift and drop pistons. the front and the rear legs uses elbow (...) (18 years ago, 12-Dec-05, to lugnet.technic)
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