Technical feather stuff

[Revsmin]

Hi, I recently joined the popular sport that is Robotic Combat, and I have decided to make a featherweight for next years FW UK champs. I have a rough idea of how it will look, but I'm a little stuck on a few technical details.
1) For 12v motors bought of the RoboChallenge site (http://www.robochallenge.co.uk/Events_a ... nical.html), what kind of speed controller would I need?
2) How would I make a pneumatic flipper?
3) What is a good pressure level for a featherweight flipper? Maybe 10 bar?

[typhoon_driver]

Re: Technical feather stuff

Welcome Jarvis. I'd recommend reading through all the many many previous posts on the same topic within the featherweight forum. This one would be a decent start,

viewtopic.php?f=111&t=3414

[psychostorm]

Re: Technical feather stuff

I have a rough idea of how it will look, but I'm a little stuck on a few technical details.
1) For 12v motors bought of the RoboChallenge site (http://www.robochallenge.co.uk/Events_a ... nical.html), what kind of speed controller would I need?

One that failsafes. Common recommendations are the Electronize, Sabretooth or Scorpion XXL. If it's really powerful, a (heavyweight designed) sidewinder.

2) How would I make a pneumatic flipper?

Bottle, regulator, safety valve, dump valve, solenoid valve, cylinder.

3) What is a good pressure level for a featherweight flipper? Maybe 10 bar?

Higher the better but the lower pressures have non custom & highly available components. Check the for sale board.

[billy breach]

Re: Technical feather stuff

Dude those are big questions that take a lot of research and knowledge to answer have s search through the topics first and narrOw the questions down.

[jonny]

Re: Technical feather stuff

Hi, I recently joined the popular sport that is Robotic Combat, and I have decided to make a featherweight for next years FW UK champs. I have a rough idea of how it will look, but I'm a little stuck on a few technical details.
1) For 12v motors bought of the RoboChallenge site (http://www.robochallenge.co.uk/Events_a ... nical.html), what kind of speed controller would I need?
2) How would I make a pneumatic flipper?
3) What is a good pressure level for a featherweight flipper? Maybe 10 bar?

1. fine
2. try having a read through other threads, here is a good website about it aswell: http://www.teamdavinci.com/understanding_pneumatics.htm
3. start out with low pressure (10 bar) parts can be bought off the shelf and it is safer

i have trevor regulator,battleswitch and 50mm bore 100mm stroke ram for sale at the minuite

[Revsmin]

Re: Technical feather stuff

Got any pics of the ram Jonny

[jonny]

Re: Technical feather stuff

i'll put up a picture, battleswitch and regulator gone now though

[jonny]

Re: Technical feather stuff

i've put up a picture on my for sale thread

[Revsmin]

Re: Technical feather stuff

For a high pressure ram, would this be good? Its about 3000 PSI, and looks perfect.
http://www.hydraulicsonline.co.uk/hy...mm-rod-52.html
And could this be a good 3000 PSI gas cylinder?
http://www.jtote.com/product_info.ph...3?currency=GBP

[blazerbotics]

Re: Technical feather stuff

Ram will be far too heavy, but would work. That bottle isn't for CO2.

[Revsmin]

Re: Technical feather stuff

What about this bottle? http://www.store.justpaintball.co.uk...pin-valve.html
And for a ram, I was wondering where I could get one from that's high pressure; could someone send me a link for one, I'll keep looking too.

[mattsdragons]

Re: Technical feather stuff

you would probably have to get one custom made to cope with the pressure. hydraulic rams are fine though but they are very heavy

[Revsmin]

Re: Technical feather stuff

Found a Hydraulic cylinder with spring return, weighs 1.5kg on right stroke size:
http://www.powerteamhydraulics.co.uk.../single-acting
Found an HP Gas Bottle too:
http://www.ebay.co.uk/itm/UP-CO2-Aqu...item255987a905

[maddox10]

Re: Technical feather stuff

I had a look at the ram.
If I'm correct, it's the 82.5mm stroke 5 ton variant. Bore is 28mm, means 320 kg of force with CO2.
Total length 165mm, and 1.5 kg.

To compare. Hannibalito III uses a 51*85 ram, 1 ton of force. Total length is 145mm, and that's including the 1/2 inlet and the thick top plate that acts as part of the frame.(that hydraulic ram uses a 3/8 npt) Weight, less than 1 kg

The aquarium CO2 bottle looks like a standard paintball bottle. So, a good deal with that pricetag.

[Anttazz]

Re: Technical feather stuff

I suppose its a bit of a trade off on weight/ability compared to cost. Can't see a cost on that page though so would need to ask them before comparing it to the price of a custom one, then if its all suitable I suppose its your choice from there.