Hi all, Can you help me with Pneumatics? sorry

[robotic_ants]

Mr R(obotic)Ants aka RAnts. I rarely get time to build, but now i'm pushing myself to get some feathers finished and parts for a heavy this year.

Anyway back on topic..

[maddox10]

Cannot wait to see what design you come up with for the actual bot, I was making some offers on the ram and got down to about £175 but got unlucky when someone paid full price. Guess this is the ram lol. Should make a good machine but as just mentioned above you may need a bigger supply bottle or be really good at driving. When fighting other good flippers you'll use half of those flips self-righting.

There are a few of those 140mm monsters made by Kos (Tough As Nails), and 1 by me (only a small difference in setup). I know where most went originaly.

1 to Alex/ODT 02 (the smallest FP flipper heavy I know of, even smaller than Mute)
1 to BillE (that one returned to me and was sold recently)
1 to Swedemac/Mytril (a crusher, with 8 tons of instant force, it was a nasty one, but alas, it suuffered from some design flaws).
1 to Hammerhead Niels (that went in Hammerhead III, a flipper, suffering from to many compromises)

@Jonny
As far as I know, the 3 refurbished composite scuba bottles are still for sale.
And yes, you're right, 95% of the CO2 bottles have a burst disk in the valve that blows at 190-195 bar. Older types can have one that goes at 135 bar.

@ Helihurley, a Burkert will have enough flow to get the ram emptied inside a second. Just take the easy way out, buy 3 Burkerts.
There are some custom build FP 5/2 and 3/2 valves. One of those uses a Hitec BS805 servo to operate, all the others use low pressure to operate. But with pricetags over £350 to build them, and all of those hidden in dark places, or in active robots (TAN uses a Woody 3/2 FP valve)

[helihurley]

Three burkets it is then.

hey jonny, yeh this would be your ram from ebay. Is your location in sussex as Me****le (incase you dont want everyone to no where you live) come up with four different places on the iphone search. I will be hoping to get to you at the weekend if I can but it might have to be Monday evening if that is allright with you are you back late or early Saturday. Any help you can give me on the ram would be great. Thanks.

At the moment I'm going to run the robot around with wheelchair motors (i know there no ideal but hopefully will be replaced with better eventualy). I already have a pair sitting on an electric wheelchair i aqquired a while ago. This wheelchair also has an electric chair height adjustment on it which is controlled by a moter driven shaft. Id say this must have some good power in it as it can lift 18st without even seeming to notice. My question then, could this be incorporated into some kind of secondary weapon on the bot maybe a grabber or somthing? Or is it just not strong enough to be any use on fighting bot.

[maddox10]

Not many designs with 2 usefull weapons. Especialy not with such a weight intensive main weapon.
That 140mm ram delivers at 10 bar the nice 1.5 tons, and at 55 bar- FP- 8.4 tons. The frame has to cope with it, doesn't it?
And the linak is maybe a tad slow for a selfrighter.

[helihurley]

Ill chuck it in the spares corner for future use then.

Is there a type of PRD that is prefered on here as i cant fing much info on forum as it returns no results if you search PRD or PRV. Did the google search and had a few things come up but strugling with the technical info (jiberish) they write up. I notice every one favours burket valves and wondered if there was a PRD equiverlant.

[maddox10]

There is no Burkert equivalent for PRD's unfortunatly.

In the early 2000's Technobots had one , but that seems to be disappeared. Most people still use that, or use a custom made one.
In the end , it's not the technology that stops people to make their own, it's certification.

[jonny]

Good, I can show you how everything goes together if you want when you collect the ram. I get back very late on Friday so I'll be available all Saturday . Anytime before the 30th should be fine. I'll pm you my full address.

[helihurley]

Thanks Jonny, once i have your adress i can work out best time for me to collect depending on where im working an ill let you no to see if it suits both of us.

I have been searching for PRV for hours now with no great lick best i could find was the following but it was designed to control water flow could this work.

http://www.danfoss.com/United_Kingdo...Valves/VRH.htm

[maddox10]

I'm afraid that will be an expensive one, and large, if I can read the flow-specs correctly.
Also, i hope they can deliver it with a certificate and setpoint at 1000psi.

[helihurley]

Searching in psi seems to be the trick with this one! I have found this is that what I need.

http://www.shoppressurewasherparts.c...e_p/971181.htm