Team Saint Robot Builds

[Omnibot9]

When finished it will look exactly like this.

[Omnibot9]

Useful info for your walker would be Boston Dynamics Patents and any open source software already out there for walkers.
http://www.freepatentsonline.com/8126592.html
http://www.freepatentsonline.com/8973613.html
http://www.freepatentsonline.com/7734375.html
http://www.freepatentsonline.com/7398843.html
https://www.poppy-project.org/en/technologies/ < don't know anything about this...
https://opensource.com/life/16/4/ope...otics-projects < or this, but you get the idea.

[craig_colliass]

Thanks for the good wishes and advice guys much appreciated.
It was strange seeing me on telly I have to say I didn't much like it at first! I'm getting used to the idea of it now.
The fights were a lot different to how I remember them. we got a lot more hits on Pulsar and Chompalot in the Chomp fight we really went for DM but no sign of it in the program.
Hoping to do better if they have an S2 and they want us.
BTW Alex from TR2 is auctioning bits of Gabriel and my coat goggles and scarf used in the Program. if you know someone who would like the bits let them know Alex posts on Unofficial Robot Wars if you want any more info.

[bigsi]

OK the question is how much pressure can a 1.25Ltr bottle of pop take before it goes, well POP!!

Between 400 & 600psi typically. Depends a lot on temperature and type of bottle. The smooth walled bottles perform better than faceted (like coke bottles).

When they blow, they make a loud bang - but the shrapnel is so light and encounters so much aerodynamic drag that it doesn't present much danger of injury. I still wouldn't want to be next to it.

I used to have access to dry-ice. Much fun putting dry ice in a bottle, screw the cap on and wait for the bang! The figures above were obtained using a pressure gauge on the bottle.

Si

[craig_colliass]

Hammer for the robots, I think I might let Saint have a play with this one. the ends are quite hard!


IMG_2435.JPG

[craig_colliass]

Hi I@m Looking for a new resistor

IMG_2541[1].jpg
I think it's about 510 Ohms with a 5% tolerance
the colours are green red red gold or green brown brown gold about 6-7mm long
not normally my field any ideas?

[R9000]

That'd be 5100 Ohms, or 5.1k Ohms (1st band green (5), 2nd band brown(1), 3rd band red (two 0s)) with gold (5%) tolerance. And of course you'll want a through-hole component.
This should do: http://uk.rs-online.com/web/p/produc...FQIM0wodBMcMng
Though it might be easier to visit your local electronics store and just ask them.

[craig_colliass]

Shuffle mechanisms? I'm thinking of doing a HW shuffler in the future what mechanisms have been tried in the past and what were the pros and cons?

Thanks

[Flag Captured]

Pitter Patter in the US uses cams to shuffle, as did Overhaul at last year's Battlebots (only in the whiteboards though)
They seem good but a little bit bumpy from what I can see, might be feasible to get rid of some of that with some tweaking...

https://youtu.be/GuMb-HgBbx0

Of course the massive detriment is that unlike some US events you don't get any weight increase so it's a bit more weight in a drive system for no real gain over a conventional wheeled setup (which is why overhaul swapped to wheels for the competition). That said, if the FRA were to honour the Robot Wars weight increases I can imagine it'd be a fair enough trade. I suppose in the wooden floor arenas you could also try small studs in the 'feet' to help increase traction?

[overkill]

Thanks for the video find Matt! That was really interesting to watch; given the high speed the system runs at, perhaps lowering the cam eccentricity and using thicker, softer grip material would reduce the bumpy drive and still move at a reasonable pace? Personally, I want to see a shuffler using the Straand Beast mechanism - totally impractical but it looks so cool

[craig_colliass]

Bosch 750w motors, I have to glue in some magnets has anyone got advice on the correct glue and procedure for this task,
Thanks.

[craig_colliass]

I'm looking to make a powered gyro for a none combat type project I was thinking of using an out runner and having the disc secured to the outside of the motor case using the output shaft as a steady with an appropriate bearing to support it, gyro would be about 600grams, speed over 12000rpm. any ideas for a good reliable motor and speed controller for the job?
thanks
Craig

[Flag Captured]

Size/weight limitations?

Would point towards the NTM Pylon motor and either ZTW spider or Afro 30a if it's a smaller project, or one of the Turnigy Helistar motors with a 200A Red Brick if there aren't really any size or weight limits. The latter would want at least 6s but the former would only need 4s

Used both in spinners and they're very torquey motors in that application so shouldn't have any trouble with 600g at 1:1

[craig_colliass]

No size or weight limitations start up acceleration ramp can be 20seconds or more! and no breaking required. those seem a little bit on the big side for a gyro are they used in feathers or Beetle?

[Flag Captured]

Oh this will spin it up in like two seconds haha

I have used the Pylon in my Beetleweight Mercury in testing and the Helistar in my Featherweight Overdrive- they both accelerate to max speed in a second or two (Overdrive got to a 13,000 theoretical in ~2.5 seconds or so with a 2.2kg drum) so you could easily get away with smaller motors I suppose... Just got to consider the startup torque so they don't cog too badly haha

How big would the weight be, diameter wise? I have an absolute ton of NTM 28-30s I could do a bit of testing on/ send some across if they'd be handy along with appropriate speed control? Still owe you one for all those offcuts from Manchester last year haha!