Im new

[leorcc]

Hi Dan,

Welcome to the forum. Your robot will need a ram with sufficient stroke, the size is a different issue. There are indeed several axes in the featherweight field (im glad there are) so I am sure several people can help you out.

[grant_ploughbot]

Hi Dan and welcome,
£200 is very tight for a good pneumatic system but can be done.
Firstly for your axe you need a rack and pinion (HPC gears do this but its expensive - If you want some cheap rack I may have some spare)
Depending on what size and MOD the rack and pinion are will depend on the stroke you need for your ram. for example- if you have a rack and pinion of 10mm pitch teeth and a 12 tooth pinion, to get 180 degrees of movement you will need a ram with 60mm stroke. The bore of the ram will depend on what you like, but i would recomend something between 60-70mm for low pressure pneumatics.
After this is sorted, you need the rest of the system.
600g/20oz bottle, 5/3 valve, regulator, 1000psi pressure relief, 16bar pressure relief, dump valve (small ball valve), rc switcher (gimsonrobotics.com - pico switch). You can add a buffer tank to get that little extra umppff out of the axe, but i would test without first.
You would also need fittings and piping to join them all together but thats usually done after you have the components.
If you want any help with this system of how to link them all together and where to get the components from drop me an e-mail (I have helped built the newest featherweight axe BASHER! which has the potential to be the most powerful yet).

Good Luck

[psycho_fling]

from what i can gather there isnt much difference but, i think it would be personal preference and how much you want to spend

[tom_kane]

I suggest the best thing to do is order Ni-Cads from technobots, but if you are looking for reasonably good and cheap Ni-Mhs, http://www.modelpower.co.ukwww.modelpower.co.uk is where a lot of featherweight roboteers get their batteries from and they seem to do the trick.

Hope this was some help
Tom

[psycho_fling]

did you know it didnt come with a reciever? was it a technobots own one? and unless you are using the servos for something special you wont need them, except for perphaps testing
alex

[geeza]

Either Model Power or Overlander. I recomend the Sanyo 2400Ah Nicads, just what I use and have so far been reliable. Sanyo and GP are generally good cells.