New hw robot prodigy

[ady]

oh yeah whoops!, the drive works fine, so does the hydralics, i had to start wiring from scratch to get it working, never found the fault of why it wasnt working before, and fit new batteries, but it seems to work well, i used all the old panels as templates to make the new ones out of polycarb, its starting to look good now but i still have some panels to finish. so if i wanted to use this in competition i would have to bin the this current setup and go to co2? and wondered how much work was involved in converting it

[woody]

Space is likely your main prob.... Why?
Well I.M.H.O. youd want two tanks .....a main tank and a buffer.
It really depends on your gas needs / usage...liquid CO2 gets cold as it expand / boils to become gas and things like regulators and valves can freeze..... expanding the gas relatively slowly via the regulator into a buffer tank prevents total freezing of the regulator and keeps most of the freezing effect away from the valves.
A buffer tank also give you a better flow potential for your valves and ram.

(Message edited by woody on May 14, 2007)

[robotic_ants]

Thinking about it do you really want to convert the whole system to pneumatic? This sounds like it is purely for weapon speed, its not going to be much of an improvement of the hydraulic claw, just the speed to flip over.. why not convert it the other way and go full hydraulic, a smaller ram attached near to the hinge of the self righting arm if it had enough grunt will turn the bot back over and the short stroke of the ram will add alittle bit more speed to self righting. Just a suggestion!

Chris - ^_^

[jamesb]

if its just for self righting, can regulated co2 not be used to charge the compressed air system? a 600g bottle can be fully vented into his larger bottle, for example? if the maths are done right, this should be ok I assume? It looks like it was basically done this way, in charging the system from a mastertank, so why not with regulated co2?

(Message edited by jamesb on May 14, 2007)

[woody]

If the tank volume to gas usage ratio is ok @ the lower pressure ( A third less than the tank could hold )then there isnt a prob.

I suppose it really depends on Januss pneumatic system.
Yes a 20 oz paintball or 600 gram cylinder should fill a 3 litre tank with gas to close to the current max allowed.

[leorcc]

It is not a bad idea, it would eliminate the freezing problem.

[ady]

i not using it just to self right, i need it to be a flipper also and a decent one, i may just remove the whole hydralics claws to free up the weight.the main weapon is the flipper

[leorcc]

Thats too bad, the reason i was interested in Janus was the hydraulics, not the pnumatics.

[ewan]

Sounds something of a waste

[woody]

Adrian can you give the pneumatic ram dimensions and the flipper tip height from closed to open.
In general l.p. flippers run two tanks ......main and buffer ....... of approx the same size as you already have installed.. assuming your current tank is a 3 litre scuba or similar.

The combined weight of a main 2kg co2 tank and a 15 bar buffer tank ( both of approx 3 litres volume ) will probably be on a par with your scuba .....so itll be room to squeeze in the extra tank rather than weight being an issue.