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Messages - TDS
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121
« on: November 24, 2015, 07:40:42 PM »
Weapon assembly ready to contain a nuclear bomb 
122
« on: November 22, 2015, 11:32:44 AM »
Currently clocking in at just under 12 pounds including the drive motors gearboxes and cylinder (and no screws) (underside shot) 
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« on: November 21, 2015, 09:06:10 PM »
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« on: November 19, 2015, 08:38:36 AM »
Nope not dead, just still working on CNCing the mill when I have time. overall design is pretty much finalized, even smaller than the previous post, the piston might be moved up or down a weensy bit but probably not.  there /should/ be enough room in there for everything I'll be doing it in 3d to verify I have enough room for misc stuff like tubing and speed controllers. The slight overlap between the frame and outer frame is so that the uhmw rear bumper can tongue and groove into the lid. The lid will likely end where the front piston trunion joins, letting me build a cool angular front end with the airspace overtop of the drive motors I've also gotten my first sponsor since returning *high5*
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« on: November 12, 2015, 11:31:02 AM »
Who do we know is coming back or applying?
We know Bite Force, beta, Chomp, Hypershock, Nightmare, Overhaul, Tombstone, Witch Doctor, and Wrecks are all intending to come back.
We know that Team Whyachi is as well, with a new Son of Whyachi.
Which new teams do we know are applying. I know Mauler has expressed interest, and Team Storm may be working for a sponsor. Anyone else?
Metabyte judging by the machine being rebuilt and the main guy being a huge baby when theoretical spinner limitations were being discussed (in order to not require wedges all the time forever) in the season2 rules discussion.
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« on: November 10, 2015, 07:09:43 PM »
My frame was binding up on the one side, i smoked a drive motor and the weapon was running at halfish pressure, the christmas tree was going to be for the rumble but I asked and they said they might not have one, and i'd probably only get one more match out of the other drive motor.
Thus christmas tree, thunderhead wasn't going to be beaten by ruin even probably if it was working properly the thing is like the perfect counter design with ~8 or 9 inches of airspace between its steel lattice lid and the important bits I want to reach. I'll have a weapon head for it next time, but mostly I knew I was going to lose unless he had a catastrophic failure somehow.
the tree was just ziptied to the hammer arm, it really didn't effect the fight at all.
I'm hoping to get ruin2 together by moto in its full 300+mph hammer glory but we'll see how long this cnc project takes me.
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« on: November 10, 2015, 10:30:25 AM »
screwing around waiting for last cnc parts to come in, working towards the fabled 600mph hammer  
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« on: November 05, 2015, 07:33:47 AM »
Is this your first robot? If so, a 30lb robot of any kind is quite ambitious—making it a vertical spinner is even more of a challenge.
That said, I am curious what your design is. Are you willing to divulge some of the details, or is it all under wraps?
I just made my first robot in like a decade a 30, its failures were almost entirely electrical and were because I did basically all the electrical in the back seat of a truck on the way to the event. Its really not that bad anymore, with things like solidworks taking the guesswork out of a lot of bot building and readily available parts that just "work" like plug and play gearboxes, there really isn't a ton of skill gap to cross between "good" robots and new ones, they can be largely designed in a couple of hours with easily findable solidworks parts, slap a frame and some zazz parts like the weaponblade overtop and you are a good amount of the way there. You no longer need to get creative and really make something really simple as your first machine. The real question is, is he prepared to make mistakes? that are probably costly in the learning process, ruin ate two drive motors and needs a better thought out frame, and a pneumatic safety that actually works at the pressure it should, if he doesn't have a good job that could be significant cost (not to mention costs of actually attending). In a beatle or antweight or something, that cost is a lot lower, a whole frame made by hand might cost you 20 or 30 dollars in materials, tops, it is a lot more forgiving on costwise.
129
« on: November 03, 2015, 08:32:56 PM »
just screwing around with geometry and making lattices  Flipping the rear section lets me maintain traction if the front lifts (which its going to, a lot) the angled front allowed the front bumper and wedgelets to connect while protecting the more vulnerable front wheel, basically I'm building a bulkhead in all 6 directions around the wheels with ~ 1/4" airspace in all directions at current length both drive pods, the wheels, shafts and some misc hardware calculate out to a little over 4 pounds, which is a crazy improvement over about 3 pounds of just frame members on ruin1 I might get fancier with the machining (infinite cnc time yay!) Unfortunately if I want to belt drive wheels which is what the design calls for, I'll likely need to not put in the cool angled side panels from the previous post unless I get creative, I could squish them down and put the front drive pulleys on the outside and the rear on the inside underneath. currently on the hunt for shorter drive motors that still put out the pain, I dont have weight or want to throw bevel gears on the gearboxes, but i'll have issues with running the same motors if they are inline with one another since I want to squish down the front end to fit more effective use of armor. Ideally there's a fatter, shorter, same or more powerful motor out there, just need to find it.  Here's the layout i'm thinking, it'll probably get a little longerbut its around 1/3rd thinner, going to really get in there with effective use of space, getting rid of the buffer chamber for something more interesting and probably suicidal, the new gas system runs underneath the clevis where the old speed controllers went and is dramatically beefier. I'm hoping to make the front area up to the hammer chain-ish area unibody aluminum with titanium skinning over it and the rest of the bot, that gives me more surface area to attach stuff inside, and lets me do cooler shapes than nutstrip uhmw would alllow.
130
« on: November 01, 2015, 06:13:57 AM »
A lot, at least 2k
But most of that money is in tools, no matter how much of the robot blows up, I still have tools
I highly suggest the 3 pound bracket, you can make them with hand tools, and dont have to go through the crazy weight management of the 1lb class.
Once my cnc is up, I can cnc parts for people for a few bucks to help offset costs
131
« on: October 31, 2015, 08:47:24 PM »
Learning solidworks waiting for my cnc parts to come in Wheelpods turning out pretty good, at .97 pounds so far, with a few solid parts that will be machined out, need some more braces, misc crap ect. For comparison just the outer bumper of the old wheel pods was .6 pounds, between these and the new wheels shafts and wheels I should save in the ballpark of 3-4 pounds, AND be stronger. 
132
« on: October 31, 2015, 07:22:25 AM »
First fight! (finally)
133
« on: October 30, 2015, 09:32:17 AM »
Redesign time! Currently I am cncing my home mill, so I haven't had a ton of CAD time, hopefully once I start making chips again I can spend time i'm not spending milling, sitting next to the mill using autocad :) Current plans: 1: Drive Train/frame: lighter, less prone to failure/fire --Custom wheels, lighter, stronger, wider than colsons --Integrate drive train into sides, not the frame ----Drive pods will be ~2" dia .125" wall square tubing ----Drive pods will be attached to the machine via new, thick UHMW front and rear bumpers, not super rigidly like before ----No rotating shafts, every shaft will be static, and have a reasonable airgap for damage --Possibly brushless upgrade, more likely drive train weight savings will go into slightly bigger drive motors 2: Weapon drive: not as strong (was overkill) lighter, no turns --Entire piston assembly to be remachined, stronger, lighter, better, easier exhaust of gas still inside the piston when fired --bigger buffer tank to be relocated to under the weapon clevis, more armored, suports that support the tank will also support the weapon frame members, everything inline with the valve instead of a bunch of 90 degree turns --clevis to be integrated with piston rod, 1" solid 7075 was overkill, weight savings to be had --new return design to not have the return chain sticking out the front --new return clevis also to integrate lifting forks on the front of the bot to satisfy sportsman rules and not tip over so much --new, lighter weight weapon hub, cam design to increase power as well as return strength --return to be pneumatically powered instead of spring powered --possibly going to two smaller tanks rather than one large one (still need to math it out) 3: Frame/armor : --if I go with 2 smaller tanks, bot can have cooler beveled sides, need to calculate weight savings VS large single tank --2 smaller tanks will also allow the machine to be less fat (though it was pretty small compared to other bots there) --armor was overkill-ish, need more effective usage of weight for armor, will likely weld another uhmw shell together, but this time properly machined with dovetails, and not half an inch thick :P --proper electronics, wiring, and pneumatics mounting rather than baling wire and bubblegum rush job --I have titanium skinning but didnt want to use it on V1, likely will be included 4: Weapon: --Going to try and make it more modular, if possible will be able to pull the hammer frame members out and replace with a flipper or other weapon on the fly, will take some engineering --Weapon will be designed last to integrate all available extra weight, some ideas for modular hammerheads are in my mind :) --Will try and keep rigid firing system from before, need a friction clutch or something for lifting forks --I kind of want to build it into a shuffler and put all 15lbs of extra weight into the hammer 
134
« on: October 26, 2015, 09:08:00 AM »
Yeah I appreciate all the help!
135
« on: October 25, 2015, 02:47:35 PM »
Ruin V thunderhead (match2)
1/4thish hammer power and 1 wheel drive, lol
136
« on: October 25, 2015, 09:24:54 AM »
So while I didnt win any matches, I had a ton of fun, and ruinv2 will be enormously better
Issues:
-before the event, it was discovered my pneumatic safety was bad, I had to fall back to a 200psi check valve, the backpressure from the hammer firing would trigger this valve, I was forced to run ~150 psi instead of the 300-500 that I was supposed to.
-team delta relay burned up after the pre match test fire vs iron golem
-the drive train is too integrated with the frame and bound up.
Lessons:
-looking at other bots, I overbuilt ruins frame because I dont have any experience in anything this small, magneto's flipper is like 1/4" thick plates, ruin has 8 3/8" frame members
-there's a ton of weight savings once I redux the pneumatics and drive system
-my armor lid worked amazingly, it took an immense beating in my second match, from a bot that was basically designed to hit exactly where I didnt want to (between the two supports, in the side where I had no attachments, right next to the window I needed for safety) and it still only suffered some damage and bent inwards, against iron golem his axe did virtually nothing, judging from other bots I dont think the biggest hammer there (piston wax) has any hope of penetrating 1/2" uhmw
Matches:
Iron golem v ruin
after I realized my hammer was out, ruin turned into a pusher, I feel as I was taking iron golem to lunch but we'll see when the video comes out if that is the case, I stuck to him like a fat kid on a buffet table, avoiding his hammer strikes and shoving him around, also wearing him as a hat once or twice, he landed a grand total of maybe 2 or 3 hits in the minute or so, and spent most of the match being shoved around, and generally being unstable which is sort of how the design works, roughly a minute into the fight I think(?) I ended up wall slamming him and the front bumper was tweaked slightly, in turn tweaking the wheelguard, which in turn bound up one side of my drive, banebots motor smoked, and I tapped.
Looking back at my second match performance, I shouldn't have tapped, again I immediately was thinking of expensive speed controller repairs without considering that my speed controllers can handle these motors at stall with gusto, there was no danger.
Despite the pretty quick loss, I was pretty happy with ruins performance, its armor was invincible, its drive was alright, I remembered how to fight immediately which was nice not getting taken to lunch by someone who fights all the time.
I removed the drive motor and set the wheels on that side to free spin so I still had mobiliy
Thunderaxe v ruin
This but was basically exactly what I didnt want to face, not only did I only have half of my drive train, but his high hammer was going to be constantly striking my hammer chains, and the upper section of my armor from the side where it is far, far weaker, in addition he had a thick steel frame, steel lattice I was guaranteed to get stuck inside, oh and his bot was so tall I wouldn't be hitting with the hammer head, oh and he had like 8 inches of airspace between that frame and any of the good stuff I wanted to hit, FANTASTIC.
This calls for the spirit of christmas, we were planning on saving it for the rumble, but as the rumble was probably not going to happen (it did but I missed it) we decided it was time since in all likelyhood I was going to burn out the remaining motor, you will see when the video is uploaded
Pretty much exactly what happened, with reduced pressure I couldn't damage the steel frame with half drive ruin drives pretty well, once or twice i was able to lift him off the ground with the stuck hammer and give him some pushing, and I missed shattering one of his plastic gearboxes by a really thin margin late in the fight.
Improvements: will be focued on reliability, and effective use of weight, since the hammer is still pretty nasty when it actually fires at full pressure, which it hasn't in anger yet, the pneumatics will likely stay close to the same
1: I will be out of commission for a bit as I upgrade and CNC-ize my mill
2: the drive train will be separated from the frame, or more specifically, it will be in its own frame, the new drive wheels will be lighter either the entire drive train will be contained within a 2" or so diameter tube, or the drive motor will be attached to that tube and not the body of the machine, basically no matter what happens to the frame of the robot, the drive train should remain solid since they are their own little "drive pods"
3: wiring and pneumatics will be prerouted, with proper terminals and manifolds, because the inside of my bot was a huge mess
4. armor will be more angular, cooler, and not put together in an hour with a jigsaw
5: since I have time, I'll likely do fancy electronic valve control, meaning I can decrease the size of my tank
Thats pretty much it, the inside of the bot was a mess because I had to make last minute changes for it to work, so the whole thing was a mess :)
137
« on: October 22, 2015, 06:57:22 PM »
Unfortunately i've run into a miriad of last minute issues, mostly because I procrastinated but whatever, taking a quick break to eat then getting back into it. the bad: - When firing at half or more power, the weapon cievis's return springs twist it, causing it to bind, I shimmed this out with a uhmw guide, which it proceeded to eat, pulling in some chain partially resolved this but I get less swing (shouldn't matter, acceleration is virtually instant) -drive train issues, just belts being too tight or too loose, my last minute belt tensioners aren't doing a good job, might run with 2 wheels, most of my weight is in front anyway -because the system is so rigid, the hammer striking caused backpressure in the system, popping the burst valve, i'm poking around for a solution of a slightly higher pressure safety valve, but not finding any results yet, this will be a scavenger hunt saturday morning more than likely. -the hammer swinging is kind of boring, despite being pretty effective the good: -the system works, pretty exceptionally well, there's not a ton of rebound force due to its rigidity, and it can do severe damage to even extremely shock mounted steel (on top of tire in previous post) and doesn't bounce around like a hammer that relies on acceleration -there's room for more effective power with some pneumatic tinkering i'll do at the event -it has a good amount of armor for how much weapon it is carting around -the frame still specs fairly well -none of these issues are really "that bad" they just are going to be difficult to resolve properly before Franklin So spoiler alert: dont get hopes up too high
138
« on: October 22, 2015, 02:24:10 PM »
139
« on: October 21, 2015, 06:10:58 PM »
unfortunately the armor shell won't be all cool and angular its first time out, I dont have time for that sh** right now good news is there's at least 1/2" uhmw with a big airgap between anything important ant the outside world, I popped an extra 1/4" on top of where the solenoid mounts since its the only thing even remotely close to the lid 
140
« on: October 20, 2015, 07:23:16 PM »
still around 1 pound underweight, if I have time i'm going to make a chain guard and an extra layer of armor over some important parts, there's already extra sheilding around the motors, solenoid, and the speed controllers are sandwiched between the hammer frame members, it would take a hell of a hit to reach them
wish I had found a micro solenoid for hammer return but hopefully ~60lbs of springs should do the job
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