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Knightrous
Site Admin
Joined: 15 Jun 2004
Posts: 8511
Location: NSW
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Anarchy has individual legs and won a few rounds, before it was beaten by a highly respectable robot, Tornado. Sure, Anarchy isn't the perfect walker, I still don't like the round and round parts contacting the legs, but if it was modified to use something like a half-swinging crank, it would be more like a linear actuator, except it would be faster!
But by the rules, building such a mechanism is classed as a non-walker. So unless it has servos or LA's, it's not a walker, and if it's got servos or LA's, it's not worth building. _________________ https://www.halfdonethings.com/
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Mon Dec 12, 2005 8:02 pm |
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Knightrous
Site Admin
Joined: 15 Jun 2004
Posts: 8511
Location: NSW
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quote:
i think anarchy as with any shuffler or walker is cool, yet i see it as even more slack then drillzilla or that radicus shuffler. its just a piece of glorified bar hinging on a rotating sprocket instead of the multiple plates and cams.
Each of Anarchy's legs has a 2DOF. The top sprocket lifts the leg up and down, and the bottom moves the leg forward and backwards. The problem is that it moves them in a circular motion, I would like to refine the Anarchy system and replace the direct circular motion with a linear movement via two cranks and linkages.
Lol, reading my post sounds like I'm trying to build a walker. Shame I'm not though.
quote:
mho shufflers can be done in the weight limit quite easily and i definitely intend on building one sometime down the track. offers the advantages track style traction with awesomeness of wheels , i think thatll be next on the list of robots.
Shufflebots (KFC, Son of Whyachi, and Drillzilla[Drillzilla is not a walker like Anarchy]) definately have good advantages with traction and can maintain a good speed, plus they can infact be done inside the weight limit.
You might be barking up the right tree there Glen... Super King Cobra. Urathane shuffle plates, Dewalt motors, steel armour Plenty of push, plus plenty of traction! _________________ https://www.halfdonethings.com/
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Mon Dec 12, 2005 10:20 pm |
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Knightrous
Site Admin
Joined: 15 Jun 2004
Posts: 8511
Location: NSW
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Mmm. The term 2DOF, was used incorrectly in my last post . The top and bottom movements even though seperate, are not individually 'free', because they are locked together via chains. 2 Degrees of Motion (DOM) is probably a more suited term for my last post.
quote:
Anarchy is a classic four-bar shuffler, not a walker.
I dissagree to an extent. I wouldn't call Anarchy a shuffler, but I wouldn't class it as a perfect walker either. Anarchy has 'legs', which are things you need to walk(Snakes can't walk, they don't have legs), Son of Whyachi has shuffle pads/feet, not 'legs', so instantly is not a walker. If it doesn't have legs as defined by the dictionary, tt's not possible for it to walk.
This has legs.
http://www.boltontech.org.uk/sprinter.htm
This doesn't have legs.
http://www.teammadcow.com/kfc.htm _________________ https://www.halfdonethings.com/
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Tue Dec 13, 2005 9:57 am |
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DavidM
Joined: 07 Jul 2004
Posts: 41
Location: Victoria, Australia, Earth, Milky Way Galaxy
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Although my bot did walk on the weekend, it wasn't a major success of moving even one step at robowars as the micro died in the arena. However as there is a walking (you will have to take my word on this) bot, this thread now has a tangible element.
Before I go any further I do obviously have a vested interest and it should be know Werewolf weighs in at about 16kg - approximately 2.5 overweight, not much overweight considering the aethetics involved.
The "drive" mechanism was derived from a bipedal PIC robot called Bigfoot, I'm not sure if it was the first to use the mechanism however its been around for many years. Think 'Robosapien', I think it may use a similiar type of drive. The mechanism uses two motors, that are driven in a sequence, the gearbox/linkages never complete more than say 40 degrees of angular movement and the motors are switched alternately backwards and forwards under sequenced control of the micro - although relays/logic or manual control could be used in its simplest form.
I don't think Werewolf qualifies under the true spirit of a walker, and the two independant degrees of freedom of each leg legally disqualify the "drive". One however could modify the "drive" design to have four motors which could possibly comply with the rule.
However I don't think it fits as a shuffler either, but with some ingenuity it could possibly work without the alternating motor directions and work of some sort of crank mechanism, although to get everything synchronised and be able to turn left or right as well as forward/bach probably should deserve a bonus anyway - as it wouldn't be trivial, if not extremely difficult, to darn near impossible.
I can understand the no-shuffler rule, to remove bumpy wheels and cranks from being used as tricks.
As discussed in the tread the easiest rule is the EO decides, and I am cool with this, but what would be useful is a decision on the weight for EO deemed "sort of walking, but not a walker bonus".
My suggestion 16kg say 3kg bonus weight (way less than the 50% bonus).
But seriously its an extra 3 kg is fairly meager for the effort and getting the EO's support.
And if Werewolf is deemed walking and recieved the bonus, we would have our first walking bot and possibly the end of this 'eternal' debate.
DavidM
P.S.
When I turned up, it was obvious to me that Werewolf would not be competitive or dangerous bot. I have bossibly gone to far over to the demonstration or novelty bot side, but I think it fills a niche in the spectrum of bots that we have.
DM _________________ "Limitation shows the Master."
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Mon Jan 16, 2006 11:58 pm |
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