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Dreakoth
Joined: 20 Jul 2007
Posts: 46
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Dragon (beetle) - Team Savage
Class: Beetel
Chassis: Polycarb and Ali strut
Armour: Ali ~ 5mm+
Weapon: Ali fbs disc shell
Weapon control: Z-power 450 size brushless outrunner powered by random esc
Drivetrain: 2x COPAL 30:1 gearmotors running 35mm foamlites
Drive controller: sabertooth 2x5
Batteries: 3s 11.1v lipo ~900mah maybe go for 4s for fun.
Hey guys, dunno if this is the right forum but meh this is the only part of the forum i visit
I'v got some ideas for building a new bot, basically i have a new hobby lathe and i want to make use of it for my bot.
Basically looking to do both a beatleweight and a feather, want to do a fullbody spinner or something in beetleweight to make use of my new lathe and redo my pnuematic axe bot in the feather.
With the feather the basic idea is to make my own custom pnuematic ram to get the size and weight down and stuff to make a more viable bot. I would try to make a ram / piston valve combo, and try to spec it to handle fullpressure co2 thats the end goal anyway, then build up a feather with drill motors for drive, a sabertooth25 and lipos (as iv alrdy got this stuff)
I'm looking for two things, help on design and ideas on how to build a pnuematic ram, and ideas for things to build / projects to do on my lathe to get practise and skills up.
One question i have with pnuamtic rams ect, if i was to recess an Oring into an end cap of ram to make a seal on the push rod, does anyone know any info on how much you over size the oring, like would u have a 2.5mm recess and a 5mm thick oring? so u have 2.5mm of extra rubber for compression? basically looking for specs on how to set an oring properly to make a seal - and a relationship for the recess size and oring size to the pressure it could take. Also how much differnece between the rod and the hole in the end cap..
At the moment i would have to just trial and error untill something worked but that seems like alot of testing. And theres not alot of info on the net that i could find.
Cheers, hopefully i can pick ur brains and end up with something good.
Last edited by Dreakoth on Sun Jun 06, 2010 7:10 am; edited 1 time in total
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Tue Jun 01, 2010 4:54 am |
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