Massacre - FW

Because Ellis made me promise to start a build diary and i fear the wrath of Tormenta 2 :P
Hopefully the name isn't taken, had a quick (very quick) look and i think its free, ready to be corrected though. Anyway, the plan with this robot is to have a nice, compact robot to take to the champs that is well made and doesn't make me look like a right dribbler. At present moment i am going for an overhead bar style spinner, tad ambitious, but it can only go wrong. Going to concentrate on getting the drive and that going first and see how big a bar i can fit in that weight. wheel wise i will be using 40mm wide shore 40 73mm banebots, still dithering around gearbox wise. The bulkheads and suports will be 12mm T6 alu.
meh, its probably an insanely bad idea, but it will give me something to do. I'll post some pictures of the plans and designs when i can, fairly generic looking but might have a bit of power.

(oh, and cheers to the people who helped me with the planning of this, namely Pedro McHarg who very nicely put up with me badgering him :) )

It will be interesting to see an overhead bar spinner in the UK. I don't think there is one running at the moment. The Americans love them for some reason but I am not entirely sure why. You might take a few people by surprise with a new machine like that. I hope it goes well for you :-) yay for spinners!

Not a build diary until you add pictures!

Look forward to seeing an Overhead being built.

Oh i could post up pictures of bits so far, they would just be really boring, as half the bits have yet to be ordered or haven't come yet. Don't worry, you probably will be photoraped at a later date :P

still looking for Bar material, not sure wheather to go down the hardox route or maybes go for ti.
Also need to think about right angled gearboxes to fit the bushless.

design
http://i947.photobucket.com/albums/a...assacreCAD.png

its just to get a rough feel for where things are going to be and how small i can make it, the bar (nicknamed the fuBAR mk1) will almost certanaly change depending on levels of sanity. I know it isn't up to much at this stage, but its been planned more than most other things i build (was depressingly easy to do so :oops: i need to rethink my atitude to robotics methinks! ) and its really nothing special.
There probably are a few glaring flaws that i will find out once i have another propper think about it. As i might have said, i'm going to get it driving and moving first before i start on any nasty spinney items.

cheers, harry.

(oh, few more odds and sods ordered: conecters, fuses etc)

EDIT: just found a bit of stainless steel bar which is almost exactly the right size, i'm just worryed its a tad thin at 10mm? what do you people recon?

Harry, that look fookin awesome! Please build this and destroy what ever I may create by that time! :D

that looks ridiculously good and dangerous.

That looks really cool but you might want to think about using smaller wheels to make the robot lower to bring the blade closer to the ground so the bar won't go over the top of other robots? Or you could put the blade at an angle or have wedges on all sides so robots drive up into the blade.
I would be worried about using 10mm mild steel but stainless may be strong enough but you may find yourself hammering the blade back into shape after fights with vertical/drum spinners

cheers Matt & Lewis :)

Max- i'm trying to get the bar as close to the floor as i can, but i can only go so far. I also don't particularly want to have to hammer the bar back into shape much. if i go for the 10mm stainless (and probably will anyway) i will go for a flat bar instead of the shaped one i have there
there will probably be skirts round the sides and a ground scraping wedge at the front to try and lure the real flat pushers up onto the bar.

thanks.

Do the wheels need to stick out of the top? Presumably you'll be using ML for non full combat anyway so maybe better keeping them small and covered to prevent you from clipping them if the bar does have some bend in it. If your worried about it being too thin you could maybe weld on some reinforcement on the top, like a thinner bar, to strengthen it and maybe attempt to increase its chances of being able to self right.

Looks good :)

I'd personally ditch the double wheels only having 4 not 8

I'm presuming here but have you worked the gearbox out for the weapon? If you haven't id imagine you'd be able to save some vertical space there and get the blade a bit lower

Look forward to the pics :)

Long time and little progress.
Changed the design a bit, is now a bit wider and a couple of glaring flaws have been sorted out, just waitng for more to become aparant.
Today I made a start on the wedge on the front, a bit of 6mm aluminum with 6 bits of 12mm nylon bolted to it, actual wedge will be a 2mm Ti, same as the baseplate this whole front wedge will be atached using 4 M10 bolts and aditional aluminum angle tapped to M4. Bulkheads will be 2 layers of 15mm hpde with 6m alu bolted to them
http://i947.photobucket.com/albums/a...uin/001-63.jpg


Still need to find some material for the bar. Considering Ti but that has proven difficult to find.
Thanks.

*dusts off thread*

Well it was pretty clear I had no idea what i was doing when i started this, and still don't tbh but progress has been made.
material for the bar has arrived and i just stuck it on the top to see what it would look like. Looks okay to me. Haven't started on the weapon yet as i was getting the drive in semi working order. Some hideously bad ideas are at play here I feel but should be a wonderful learning experience :)

plain robot:
http://i947.photobucket.com/albums/a...ps97328eb4.jpg

mock up of weapon
http://i947.photobucket.com/albums/a...ps5d0d484e.jpg

It's better than last year at any rate

Quote:

---

Originally Posted by harry hills

*dusts off thread*

Well it was pretty clear I had no idea what i was doing when i started this, and still don't tbh but progress has been made.
material for the bar has arrived and i just stuck it on the top to see what it would look like. Looks okay to me. Haven't started on the weapon yet as i was getting the drive in semi working order. Some hideously bad ideas are at play here I feel but should be a wonderful learning experience :)

plain robot:
http://i947.photobucket.com/albums/a...ps97328eb4.jpg

mock up of weapon
http://i947.photobucket.com/albums/a...ps5d0d484e.jpg

It's better than last year at any rate

---

Looking good man.

Quick question, is this the design based off one of mine that I let you use or one of your own?

Still looking good :D

Well that design you sent me sparked off the whole overhead thing so kinda :)

Hehe, glad to see I play some part in this :)

Nice design...looks really menacing. And if well built its capable of inflicting quite some heavy damage.
A local team has a similar machine (pic below)


https://fbcdn-sphotos-e-a.akamaihd.n...94138778_o.jpg


and it did do quite a good deal of damage!! :uhoh:

https://fbcdn-sphotos-d-a.akamaihd.n...00373865_o.jpg

Your design reminds me of Hazard

I doubt it will be anything special, but it might knock a couple of hdpe robots about.
Update, had lots of spares and other bits arrive including the battery, an 18.5v 4000mah 35c lipo. slightly wary of it atm, I need to order a slightly bigger lipo bag before I attempt to charge it, hope I don't break anything on the first charge :?

Quote:

---

Originally Posted by harry hills

EDIT: just found a bit of stainless steel bar which is almost exactly the right size, i'm just worryed its a tad thin at 10mm? what do you people recon?

---

I think its not the thickness which matters in your case, but the width of the bar, and also any holes drilled in the bar will weaken it, for example on Pacman, the bar they used measured roughly 500mm long, 3/8 thick and 2 wide made from steel - it got bent from the centre because the mounting hole was too big.

Out of curiosity, how are you going to transmit drive to the spinner?

Aye, I was worried about breaking or bending at the center, so I am supporting it slightly by putting it in some hdpe.
http://i947.photobucket.com/albums/a...ps9488d4e6.jpg

The speed 900's run through a right angled gearbox which then has another stage on it. This is probably not the best or even a sensible way to do it but it might work okayish for a fight or two.

I'm afraid HDPE wont help that much, it too soft I think :| but than again, it depends on the hole you put in the centre - you could try to keep it as small as practically possible...
Does the gearbox connect directly to the spinner bar, or you got some type of clutch/bearing there?

HDPE is no use as a structural support for metal. It's to flexible.

noted. thank you.

Had the armor and bits for the frame arrive, so have now managed to get it into drive-able state. took some videos.
http://www.youtube.com/watch?v=uZDNgib9Svk

May just be the way your camera picks up sound, but your drive motors sound quite...crunchy. The same sort of crunch you hear in adverts for Crunchy Nut Corn Flakes. Are they decently greased up?

Otherwise it's looking good! Nice solid machine.

They are rather crunchy. I desperately need to re grease them. Luckily this is an easy robot to take apart. But thanks anyway mate :)

See you in Q1 ;)

bugger :P

Just popping in to check up on opponents....3 way spinner first round. Look forward to it. :)

dam both my bot are against cobalt :uhoh: in q1 better make some spare top panels then

aye, its going to be proper fun.

Just wondering for absolutly no reason, how high is that bar off the floor? :lol:

erm... if i say 200mm willl you belive me :P

It has to clear the wheels so that would be 80mm bare minimum; that gives 5mm clearance on the wheels. But I think it will be closer to 90mm myself.

Going great by the way! This is a really complex build and it seems to be going perfectly so far!

My whole robot is only 70mm in the body :rofl:

Turisas? 70mm tall? Oooooo :twisted: thats good!

Turisas? 70mm tall? Ooooo :twisted: Thats usefull to know.

With 100mm wheels? Or is it not invertible?

or with 75mm wheels (or is that the 50mm wheels Matt :P )

Just something to watch out for Mattsdragons - if your robot's 70mm tall and using 75mm wheels in vertible then your likely to have a few issues getting stuck on the arena floor. Although it's the flattest floor of any to drive on, the hardox panels can warp slightly with heat etc and so 2.5mm ground clearence all over may get you stuck at times.

Its using 75mm wheels, if I get stuck then ill just have to deal with it

Got nothing to hide