That's not the point, it's always good to animate a pile of parts.
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That's not the point, it's always good to animate a pile of parts.
Hey thats cool, I like the shape a lot. Could go with a large hardcore servo with a small arm to roll it back onto its wheels? Whens its first event?
Yeah that's a cool idea with the servo! I saw a big one linked on Lazy Toads website:
http://www.vantec.com/ssps105.htm
I was trying to get to Barnsley at the end of June but baby number 2 is due 2nd July so not sure if that will happen or not lol.
The next one oop norf is Doncaster later in the year I think so could give it a run out then :)
Thank you for all the nice comments! I started out with La Machine in mind and the robot just sort of ended up like this the more I cut and drilled haha. Really really want to build a Torpedo 850 drive train but don't have a drill press just yet to get the accuracy for the Mod 1.0 stuff.
Good luck with baby number two mate.
I am aware of those servos but 650+ dollars is quite a tall order for a servo :)
I would recommend hobby king:
Quick check and I found this. 25 bucks, 20kg of torque and should be more than enough.
http://www.hobbyking.com/hobbyking/s...ec_140_5g.html
I wouldnt recommend attaching an arm directly onto the servo as they just arnt designed for this kind of thing but a leaver or pushing onto a leaver mechanism would work. Its what I do on the front prongs of my robot and I havnt knackered a servo yet.
Yeah I will have to come up with some way of rolling it back over. Have looked at servos and high torque MFA motors etc. I've been really impressed with Scissorhands' and Mr Mangle's roll over hoops :) Been reading a few bits on which shapes work and don't work, also badgered a few people about it lol.
One thing I keep thinking is that there are very few "lifters" out there now. Most of those sorts of robots are FP Flippers that are after lobbing you out of the arena, in which case no amount of invertible-ness or self righting is going to help.
Sat for ages and ages sketching and sorting out where everything is likely to go in heavy. The results of about 64 different pages of sketches can be summed up below.
http://i174.photobucket.com/albums/w...pscf8374c8.jpg
Thanks for all the info on the batteries in the other threads, they arrived this weekend and are happily charging :)
http://i174.photobucket.com/albums/w...ps84defa01.jpg
Thanks for the kind words about my roll-over hoops! The onion shaped hoop works best for me although different shaped bots might benefit from different shaped hoops - its important to experiment. Another important feature is to always make the base of the hoops stick out further than the frame.
Advantages:
* Low-tech, no moving parts to break
* Cheap
* Works automatically
* Relatively low weight
* Provides shock absorption
Disadvantages:
* Can hang up on arena hazards
* Won't always work in arena corners
* Can get tangled with hammer and lifter bots
Looking at the servos mentioned above, the Seiko has almost 30X the torque of the Hobbyking one - I really doubt the 2 ft/pounds from the HK servo will turn your bot over. The are some mid-range options to look at: Invenscience has servos similar to the Seiko here http://www.invenscience.com/index_fi...tary_servo.htm . The i01853 has 8.3 ft/pounds of torque and as it has continuous rotation, you can gear it to produce whatever torque you need.
If you search thru the Aussie forum, Glen fitted Demon with a very effective self-righter made from a drill motor. The latest version with a custom metal case and clutch looks indestructible.
Cheers! Is demon the vertical spinner with the red bar sticking up? I've actually seen that one in one of the video's it looks awesome!
I first saw the servo idea on Ice Cube, one of the lazy toad robots. Am digging the hoops, I know they won't work every time but I was thinking most flippers throw with a fair amount of momentum so most times out of ten it should work lol. I know some have tried them but I don't feel they've been fully exploited here in the UK yet! I prefer it to the robot being invertible as there's a lot of nasty axes about this year onwards.
The servo you've listed looks pretty indestructible! I'm gonna try some different hoops and antlers etc. and see what works best :)
This is Demon's build thread: http://www.robowars.org/forum/viewto...t=1261&start=0 Apart from being a heavy hitter, its made of military grade armour plate and never gets dented.
Another cheap self-righter option would be combining a 64:1 Banebots P60 with a Robotpower Wasp ESC http://www.robotpower.com/products/wasp_info.html. The Wasp has limit switch inputs, giving you the equivalent of a giant servo for far less money.
Might try a hoop first as it's cheap lol and then if that's naff have a go at a home brew flipperer-backer-overer .
Got fed up with making roll bars that never work, gonna rebuild Rag N Bone 2 back to being invertable but stick with the scoop as it's a million times more effective that the spike was. Will stick a picture up after tea as going to strip it down this afternoon. It's also a mare trying to get to the internals with a big body on.
Erm, I had another picture after robot building to put up. I decided Rag N Bone 2 wouldn't go on to do anything exciting unless it was invertable. Experiments with roll over hoops were taking for ever and I couldn't be bothered spending the cash to come up with a self righter. I decided to cut the body away so that the robot looked like Rag N Bone 1, but it's obviously a new robot on 12V with fresh motors and wheels etc. I'm just sorting a top for it and I'll be set to fight. It drives nice as-is so am happy with it other than it needing a roof.
Heavy parts are taking forever to cut and sort out. I was at it all weekend in my spare time and don't feel like I'm getting any where but I know taking the time now will mean it at least gets a run out in the arena. I've been taking pictures as I go but when I look back through them it's like "oh look another angle bracket" so I won't bore you all to death till I have something substantial to show. In other news, the Beetle motors are on there way to MegaMasher. Once I caught on that for the for see able the Beetle events are gonna be down south, and that they were as dear to build as a feather I thought I may as well stick to a feather and a heavy.
I can see a day when the heavies decline and feathers and beetles are the main thrux of the community, as they are in the states and oz. At that point I'll get stuck into a beetle but at the minute trying to screw a heavy together is taking up most of my random ideas lol. I will try and get to a stage where I have some heavy pictures to put up.
http://i174.photobucket.com/albums/w...ps94168dce.jpg
Cheers Dave,
Feathers looking good too
The pile of scrap is gathering momentum! Oo scrappy! name for a beetle! Well...at some point haha
Well pile of parts is moving, who knew it but Dell make awesome robot lids. Have almost given up on building a heavy, think feather is my limit. I can just about cobble together offcuts into something about 10kg that rolls backwards and forwards. Trying to get enough offcuts and stuff together to build a heavy is really hard. Anyone wanna buy some wheel chair motors and some brand new SLA's with charger haha.
Rag N Bone 2 is pretty much there, not gonna paint it so it looks extra rubbish. Bolts and brackets for lid to follow shortly. (note...features flag and handbag)
http://i174.photobucket.com/albums/w...psd396ac9b.jpg
That actually looks pretty sturdy!
And is that the next bot, Flag N Bag? XD
Haha Flag n Bag made me laugh! And yeah it's actually turned out to be quite strong for once lol. They're normally rubbish but this is the first one I feel half alright about.
Wow, niiice!
Coming along nicely
Planning on trying a bulk headed wooden chassis with metal outer skin to see how it holds up. There's a lot more to go on like wheel guards, loads more bulk heading and stuff. I've been at it a few weeks trying different ideas and this looked about right so got excited and went and dug out the motors and batteries and an off-cut to see what it would look like :)
Erm the other robots weren't really working out, the motors were naff, the 1200mah batteries were giving up too quick, the ally angle bends to quick. The only good bits were base and scoop so stuck with them. Fed up of the Rag N Bone name so calling new robot ruSt. It has a new battery and new drill motors, fresh sabertooth and is as massively simple as I can make a robot. Asside from electronics everything on this is recycled, down to the bolts. It looks rubbish and simple and it is. Hopefully see you at Doncaster on 5th October.
http://i174.photobucket.com/albums/w...psc1b16146.jpg
Started building an ant! Got the running gear going yesterday and bought some scales today! Hopefully start building tonight!
http://i174.photobucket.com/albums/w...ps398aa1c5.jpg
http://i174.photobucket.com/albums/w...ps175fbe46.jpg
Looks good, just thinking, your battery and receiver are quite big and probably weigh quite a bit. There are a lot of other, lighter options available:
I use this receiver in Mini E: http://www.deltang.co.uk/rx36-2.jpg
But you could easily get away with something like this: http://www.ebay.co.uk/itm/Orange-Ora...item3a95230743
In terms of battery's, there's a host of small, reasonably priced lipo's out there. Just thought this might be helpful :)
PS: Not sure if you've already know about it or not, but there's this forum as well that focus's mainly on AW's and a lot of help and advice can be found there!
Thank you for the great advice :)
Yeah I've just joined the 101 forum and been having a read. The parts for the ant are a gear motor kit I bought from the same site. I know some of it is clunkier than other stuff out there, my plan was to get a good base and add/upgrade as I go.
Got a sketch together for antweight
http://i174.photobucket.com/albums/w...psa7703334.jpg
Just wanted to vent thoughts, as I said I would be at events and haven't been. I've spent the summer getting baby number 2 here ok, and finishing a degree I've been doing part time. It's been a busy year and summer, but baby is here and I got a 2-1 FTW. I've now turned my attention back to robots after half heartedly abandoning things for six months but I suppose that's how it goes sometimes.
On the robot front I've built a feather called ruSt which is literally waiting for a competition oop norf. I have ordered an ant kit and have some pictures above. I'm waiting for some more stuff and am going to have an ant up and running before long. I've also been having different attempts at a heavy, and so far nothing has been successful. I was on the verge of selling up and admitting that the heavy class just wasn't for me, when my dad came through and has sorted out a box section and angle frame for me. The heavy will still be crude, (I imagine an invertible brick) but will run ok and be up to weight. The heavyweight class is where I aspire to be, so I'm planning on getting an ant running for my 5 yr old, doing some bits with the feather, and concentrating over winter on the heavy to get it to events in the new year.
I have running gear, sla's, tx and rx and charging stuff all put to one side. I'm making a link and LED this week with a wiring harness and so will just need to get the ESC together although I have an idea of what I'm going to do with that. People will tell me it won't work so want to try it first before I announce it. Thank you for reading, and I appreciate all the help I've been getting and for the patience everyone has with me and my daft questions.
Dave
That ant design looks very interesting indeed! Like like like......
Anyway just checking you knew about the 4 inch box rule, kinda assumed you do but always best to check :) The rest of the plans for the feather and heavy also look very promising. Oh, and good luck with the baby :D
Thanks! Yeah just wanted to build something a bit different! I'm planning a feather and heavy version if the ant works lol. I only clocked the 4 inch box rule at the last second lol nearly ended up with the world's biggest antweight :) I joined the ant forum and have been having a read to get a feel for how they go together and stuff.
Thank you for the kind words with everything else :)
First attempt at an Ant!
http://i174.photobucket.com/albums/w...psff6d175e.jpg
http://i174.photobucket.com/albums/w...ps81c2c8c5.jpg
http://i174.photobucket.com/albums/w...ps03de8090.jpg
http://i174.photobucket.com/albums/w...ps632ab8cb.jpg
Quick vid of it driving round the couch!
http://i174.photobucket.com/albums/w...ps94dd6dc5.mp4
Better than my first (and some of my recent) antweights :)
haha thanks :D
I've become a bit obsessed recently on the idea of a wooden heavyweight. I have 16 tons of ply and 2x2 / door frame that seems to be on a never ending supply. I have a half baked box section frame as well. Over the last 18 months I'd accumulated wheel chair running gear, batteries and an rx/tx, all I really needed was a speedo. So when deciding to call it a day with a heavy a load of family said I should give my wooden heavy idea a go. If it got mashed up at least I'd not really lost anything as I'd been planning to give the stuff away anyway. All it owes me is £50 for a pair of wheel chair motors and around £40 for the SLA's and their charger.
This got me to thinking about how to make a chassis strong enough, and if a robot were to be made entirely of wood you'd have to be really careful with the design. It would need metal skid plates and maybe bits of steel sheet as armour, but I'm about 60% convinced it will work. So I've made about 12 wooden chassis up to now and finally have something I can jump on and chuck about. The idea is pretty much just an invertable brick as it's all I can really build, I am toying with the idea of getting someone like Mario to weld me up a scoop. If this doesn't work I have money to start water jetting and getting stuff welded etc., but really wanted to see if I could get this to work. So, here is my wooden chassis, I will populate it with bits tonight and see if I can get another picture up.
http://i174.photobucket.com/albums/w...ps2bdb47fe.jpg
If a DeHaviland Mosquito could do what it did made from wood, a robot can do the job too.
But I would look up Dr wallis and geodesic design.
This is a good way or working up to a metal heavy. My thoughts are, if you're going to build a brick then it needs a scoop. This could be fabricated in wood and then you could bolt on metal plates! The its heavy we built was a cobbled together item, but we made it run and it got on the show. it was a bit crap, but the point is it was loads of fun.
That's really cool. I've been a bit fascinated with how difficult it is to hammer through 12mm ply and snap it etc. It's obviously not hardox and wears icredibly fast when dragged along the floor but am hoping with ball transfers and strategic plating it can be ok lol.
Best of luck with the build dave :)
Thank you :) You too
cheers :)
Well been getting ideas again (which I know is always dangerous) so thought I'd sketch them and put them up in the usual manner. Dreamt up the idea of a feather weight grabber powered by drill motors and a linac. Would need making out of metal which is harder for me. And my fav idea so far that's just a Z shape with 4 wheel drive. I'm building a 4x4 robot for the champs and am building up a relationship with a local machine shop that supply steel but also cut and weld. It's pretty good as they're a pair of old blokes so I can take in a sketch with some dimensions and thicknesses and wave my arms around a bit and they sort of get the idea. My dad knew them from back in the day when he used to build racing cars for people in his spare time, they used to make all his cages and rads and various bracketrynesses. Having tried the wooden heavy I'm not especially convinced so am trying to talk these blokes into building me a heavy body that I can put running gear into. It's just an invert-able wedge (think heavyweight Endeavor). I dropped the sketches and sizes off today to let them umm and arr and go down the pub and have a think. I'm supposed to meet them in the pub tomo afternoon to discuss.
Please find ideas below. Oh and I'm gonna make my own feather wheels from now on. Was looking into Banebots wheels but the prices are lunacy. I ordered a family sized grab bag of 3/8 UNF brake pipe connectors so going to try them on a drill shaft tomorrow. My mum has also given me some old saucepans so I have an idea to build a thwack bot using them for wheels. And also erm my ant has been pulled to pieces to make it more like the original sketch. And I'm building a beetle! Ordering a sabertooth and 25mm motors next week. Have loads of time now my degree is finished lol.
Thanks for reading if you got to the end of all that!
http://i174.photobucket.com/albums/w...ps1a5f925d.jpg
http://i174.photobucket.com/albums/w...ps4fa9436a.jpg
http://i174.photobucket.com/albums/w...ps34e228f3.jpg
http://i174.photobucket.com/albums/w...psb342982b.jpg