Just got the robot formally known as ARAC2 from Shane :proud:
To those who don't know what this is please watch the video below
http://www.youtube.com/watch?v=p4WGrcydx8c
Printable View
Just got the robot formally known as ARAC2 from Shane :proud:
To those who don't know what this is please watch the video below
http://www.youtube.com/watch?v=p4WGrcydx8c
Now that's cool, they look so hard to design and build
Just a few pictures of Spiderbot. I thought people would like to see this one as walkers are quite rare and it may inspire others to make and run walker robots.
http://i569.photobucket.com/albums/s...t/IMGA5622.jpg
http://i569.photobucket.com/albums/s...t/IMGA5621.jpg
I have removed the top covers and am re-mounting the motors, the idea is they should have some movement allowed. So I am making some rubber washers to help loads of spring washers and Nyloc nuts.
The old system
http://i569.photobucket.com/albums/s...t/IMGA5618.jpg
The new system with rubber mounting washers
http://i569.photobucket.com/albums/s...t/IMGA5617.jpg
Some other images of the walker
http://i569.photobucket.com/albums/s...t/IMGA5611.jpg
http://i569.photobucket.com/albums/s...t/IMGA5616.jpg
And finally the double crank that operates four legs on one side.
http://i569.photobucket.com/albums/s...t/IMGA5619.jpg
Hope you enjoyed looking at the Spiderbot
Spider bot, spider bot, does whatever a spider bot does....
A smaller version
http://youtu.be/YlUK5LMXk4s
Seen that video before I don't know who the robot belongs too or if it still exists in that form but it would be nice to see it at one of the shows.
I have re fitted the other motor so they are both done, and designed a new floor and electronics tray for the robot hope to get that finished this week. I took the eyes off the robot and are going to re do them so they move with the steering using a servo to move them, I am looking for lights for the eyes anyone got any ideas for that?
Froggy built it, dont know who as it now
I tried a quick forum search but it proved fruitless, would anyone know of a site/place that had the schematics for this type of system. I would like to scale it down into an antweight.
Hi the best start would be this site If you go to the concept page info can be found there.
http://www.mechanicalspider.com/index.html
Dose anyone recognise this lamp holder? As I would like to replace them thanks
http://i569.photobucket.com/albums/s...t/IMGA5623.jpg
ive seen them before there 12v sockets but ill try to ask my electrician
They look like a standard MR16 GX5.3 spot light fittings although depending on their actual size they could be MR11 with a GU4 base.
I wouldn't recommend fitting a Halogen bulb as they are pressurized with halogen gas, reach very high temperatures and are actually quite prone to contamination from grease and finger prints reducing the bulbs life. If you are looking for a replacement you could get LED ones which are alot safer, last longer and run alot cooler.
http://www.energylightbulbs.co.uk/produ ... -Connector
Yes thanks they do look like these I was thinking of using the LED type as I don't like the Halogen lamp in my house let alone in a robot!
Also if anyone dose 3D print some leg mechanisms for an ant robot I would like some too It would be nice to make a miniature version of Spiderbot :proud:
Some pictures showing some progress
First a picture of the leg linkage nothing too complex there.
http://i569.photobucket.com/albums/s...s/IMGA5628.jpg
The Sidewinder now has the cables and plugs attached
http://i569.photobucket.com/albums/s...s/IMGA5625.jpg
There are two large steel box sections running across the robot not doing much these will be replaced with Aluminium channel to save weight.
http://i569.photobucket.com/albums/s...s/IMGA5626.jpg
a Sidewinder in a walker :shock:
sidewinders are awesome
looking good though
looking good Craig, going have to put a walker on my list of things to make, do like how Arac walks.
Hi Alan
I like the walking action of this type of robot too it dose look like a spider.
It's not as efficient as the pilgrim design, as the robot tends to bounce up and down as it walks (this uses a lot of the available energy and why I'm trying to loose weight). with the pilgrim design this problem is reduced to a minimum.
Also with the sets of legs so close together they tend to get tangled when you turn. one reason Pilgrim has the legs equidistant.
Hi Archie
With regard to the Sidewinder this came with the robot so I am putting it in to start with. the motors are only 240w 24v, so a Sidewinder is a little over kill.
In Pilgrim I used the Dimension Sabertooth 2X25 with the same setup and the controller never even gets warm. I may go with a small Wotty 100 I have and see how that dose in the robot.
I did get the robot moving yestarday but only on 12v.
OK hope you put it to good use
I was trying to leave as much of the robot as I could untouched.
But the spacer arrangement with its carnival colours was just too much for me.
I have decided to re-do them as they made the legs a little too loose for my liking anyway.
http://i569.photobucket.com/albums/s...s/IMGA5642.jpg
For some reason the 12mm nuts on the robot had been cut across the flats. I could not see any advantage to this so they were changed.
http://i569.photobucket.com/albums/s...s/IMGA5638.jpg
A picture of the side with all the legs removed the crank and the con-rods are a welded unit so there is nothing to be done with these.
They were replaced very recently and are in very good condition.
http://i569.photobucket.com/albums/s...s/IMGA5630.jpg
The start of the new spacer bushes
http://i569.photobucket.com/albums/s...s/IMGA5631.jpg
You can see they have a recess cut in one side to accommodate a hose clip,
these are being used as a retaining clip so I can adjust clearances.
The old method was a plastic collar with a retaining screw.
http://i569.photobucket.com/albums/s...s/IMGA5633.jpg
Got feed up of making lots of bushes so for a change I turned my eye to the chassis on Spiderbot.
It is made from two lengths of thick walled steel box section and some heavy gauge aluminium angle about 50mm I think!
Anyway the Old chassis weighed in at a massive 4.77Kg and seemed to be made for a fighting robot rather than a walker.
http://i569.photobucket.com/albums/s...s/IMGA5647.jpg
The new chassis is all aluminium with the heavy gauge aluminium angle replaced with something more suited for the task. the box sections on the old chassis have been replaced by aluminium channel fabricated for the task with the ends folded up to produce leg plate mountings to support the sides of the robot better. also Fitting an aluminium plate for the batteries.
All this weighed in at a respectable 1.87Kg
http://i569.photobucket.com/albums/s...s/IMGA5648.jpg
Also an electronics tray has been made to fit over the drive motors.
http://i569.photobucket.com/albums/s...s/IMGA5653.jpg
http://i569.photobucket.com/albums/s...s/IMGA5654.jpg
I haven't sorted out how to fix it yet but I am sure something will come to me.
Also a picture of the Chassis dummied in place with some batteries showing how the mountings should work.
http://i569.photobucket.com/albums/s...s/IMGA5655.jpg
Hope you found this interesting or informative.
Craig
do fw walkers have extra weight allowance?
those are quite big drive motors
this isnt a fighting robot project purely and engineering and fun exploit ....or so i believe
if it has a party piece it can be like skelletron and entertain the crowd.
That is right this is just an entertainment machine, not for the arena. I have Pilgrim as well, the idea is we can have a race, tug of war or some other competition between them.
I am looking at building a feather walker (this can be 26Kg double the normal limit.)
No walker combat machine has ever won any competition. I can only think of one fight a walker has won that was on Robot Wars a few years ago.
The reason is even with the weight advantage, they are by definition too complex and unreliable.
If you can fix this problem, they are too slow to make an effective combat platform.
you fix those two problems and you find the manoeuvrability is to unresponsive.
You fix that and you have a competitive walker that cost ten times as much as an equivalent wheeled machine. :uhoh: :uhoh:
That's what makes it interesting. :mrgreen: :mrgreen:
26kg!
that's loads
maybe I should do that've
but when you see bots like drumroll 2 they just wouldn't be the same.
but a bot like ls4 dosent need ti be fast
On the robot wars point, Jim Struts won the reserve rumble in series 2, Miss Struts won it's only battle in a fight with another walker in series 3, the other walker didn't move much bar spinning around. Clawed hopper won against Twister in series 5, the first robot to do so in the main competition. Drillzilla got to the final of the second world championship, and the German and Dutch robots Angsar and Scarab had limited success in other events, but i'm not sure if you count those because they are shufflebots. Then there was Anarchy in series 6 that got to the heat final, losing to Tornado. So there has been limited success. :PQuote:
Originally Posted by craig_colliass
Anyway, would Spiderbot satisfy the rules for walkers?
Thanks for the potted history of walking robots round the world :mrgreen:
Anarchy was the only one I knew about, but I hoped someone would fill in the gaps if I pushed the right buttons. :lol:
With regard to the question would it qualify as a walker, here is an extract from the rules.
2.2 Legged Robots
Legged Robots [Walkers] can weigh up to twice the specified weight in all classes. A walker must employ
moveable legs to support its weight. Each leg must have at least 2 axis€Ÿ of motion. Robots with rolling or
sliding mechanisms will not be classified as walkers.
Lets take a vote! :shock:
In theory then a FW walker could be 27.2kg?
This is true 27.2Kg is the limit for a walker feather.
But I always aim for 13Kg for a feather, as I find I always go over anyway. Or I find I need to modify something after the first few battles this then gives me weight to do that.
So I would say the best method for making a robot is to work out how small you can make it with all the stuff you need then work from there.
But yes 27.2Kg is the maximum weight
Just weighed Spiderbot. with no batteries and most of the covers etc. it comes in at 35Kg, so I would expect the total weight finished to be between 50-60Kg.
So not bad :mrgreen:
Doing a little more on the leg rebuild, this means lots of bushes had
to be made to space everything out also modified the links these
are the ones that connect to the crank con rods and the lower swivel.
http://i569.photobucket.com/albums/s...s/IMGA5641.jpg
You can see the link now has a spacer fitted between the two link
plates this had stiffened the sideways play on the legs quite a lot.
One of the targets I set myself with the leg rebuild.
http://i569.photobucket.com/albums/s...s/IMGA5643.jpg
Now putting the legs back together again the problem is they all
are slightly different so the spacers have to be matched to an
individual leg dimensions.
http://i569.photobucket.com/albums/s...s/IMGA5656.jpg
I have been doing a bit more on the Spiderbot, most of the initial leg restoration is finished. And the aluminium chassis is fitted in place. the legs do seem to be a little bit stiffer in the horizontal plane, so it may turn a little better than before.
There is always lots to do on this type of robot, and like Pilgrim I do get the feeling they are never complete, just a continual work in progress, but the fun is in the build.
Talking of building, I am putting together some ideas for the replacement Saint. So far I have the MAG motors some A123 batteries and some hubs and sprockets for the transmission.
It will probably be another thwack bot as everyone seems to like the crazy way that robot dose things.
Any Ideas for the new Saint post them here
I would like to make a robot that actually dose some damage, but I just don't have the heart. :uhoh: :uhoh:
Still this is all for another thread.
With mag motors and an axe head in place of the sword it may well do some damage, if it doesnt, would look and sound great
2 words, giant barnsleybot
One word Picture? :mrgreen:
sorry, rr database is down so i can't show you it. it's essentially 2 oversized wheels and a 2.5kg metre long axe. what are you doing with the old saint btw?
Was it at Burgess Hill last week end? I think I saw it. I don't know what I would do with the old Saint probably scrap it after the new one is sorted.
you cant scrap Saint!!! :sad:
yes, though it is now renamed twister (i sold it). don't scrap it! sell it to me :P seriously it's awesome.
We took the Spiderbot to Aylesbury on Sunday, It seemed to be well received by the public.
As always with a first outing after some major renovations, you wonder if the thing is ever going to work right, but to it's credit it did!
Some small problems came to my attention.
Firstly the battery tray was marked from the batteries bouncing about even with the clamp tight, so I have put some padding on the tray to reduce vibration through the robot to the batteries this should help to increase the life expectancy of the batteries.
And secondly on the lower leg swivel pin the retaining clips slipped this is due to the sideways forces on them when you turn the robot round, so I am sorting out another method for retaining the bushes in position.
If anyone took some videos of the Spiderbot please post them here.