i was wondering what solonoid valves people use in axed robots? and how they make the ram with teeth built in (for poxwering the axe) and what sort of presure people use??? thanks...
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i was wondering what solonoid valves people use in axed robots? and how they make the ram with teeth built in (for poxwering the axe) and what sort of presure people use??? thanks...
a rack and pinion axe system is usually custom machined into the cylinder rod, i don't know of any rams that come as standard with teeth in
i didnt think so... but how do they make them air tight? and is there an alternitive to that method?
you could use an accelerator mechanism or mount the end of the ram to the axe arm. i dunno how they make them air tight, i have never made one
The rack on Hell's angel was cut out of the piston, and any rack like that is never totally air-tight. Tiny Hurtz has an off-the-shelf rack peice welded onto the end of the ram.
The seal in a normal commercial piston is wide enough to limit the losses over the rack to a minimum. It never slowed THz down, didn't it?
Hmm I think the rack and pinion idea is the best for axes, but sadly I don't have the obility to machine a ram with the teeth, and I was just wonderiing, what presure do people use for axes, because all the ones I have seen are low presure...
I believe there was only 1 FP axe in use the last years, Obsidian. But that was a fully custom job.
Oh ok, any peticular reason there neally all low presure? Is it to do with haveing the strength to convert the expansion of the ram to the rotation of the axe? Or is it just to do with the fact, it would just send the robot with the axe flying? And what presure do these robots actuly work at? 10bar? 20bar??? Thanks every one for there help so far!
For feathers it's in part the ease to find valves. Not many 5/2 or 5/3 FP pneumatic, affordable valves on this world.
And using 4 Burkerts to control the FP axe-system, ain't cheap, nor light.
We have been looking around, and so far have not found the parts to make it FP, but we Have already found al the parts for low presure, and were going for a rack and pinion style linkage, I was wondering about useing a 20mm (ish) nylon 6 body with a 5-10mm HDPE armour do you think this would be storong enough to sport the axe? Thanks
http://i1111.photobucket.com/albums/h46 ... B-orig.jpg my first CAD of the axe robot, although, the axe will be larger, and the dementions will be adjusted to fit the pneumatic
looks good, how are you doing your system?
i was thinking of going for something similar to how battle axe has it or shunt
At kiddeminster Jason turned up the pressure in thors axe a little to 11.5 bar as the rod was a bit bent and slowing the axe I think he usually has it about 10.5 bar.
looks nice alex, what CAD do you use?
I used prodesk top, and I'm using a rack and pinion style system, I'm just trying to find a ram of the correct size ATM... And then I will adjust the cad, acordingly. and I used the engineering drawing, as it looks the clearest, and the CAD was multicolour, at the time, and I cba to change it...
i have to build around my ram, ive got a 40mm bore, 100mm stroke ram at 12 bar, should have some kick :)
Yeh, I just can't find one, of the right detentions... I'm looking for about 50 mm bore, 150-180mm stroke... At about 10 bar, as that's quiet a universal presure...
i need to find a 12 bar reg, thats the hard bit since i believe that trev regs only run at 10 bar
I would just run it at 10 bar if I was you, because it's still about 500 kgs of force coming from a 40mm bore ram... I'm only using the extra power, so I can flip robots using the specially shaped axe head....
that was my plan as well :lol:
Haha ok, but a quick question, would 60kg of force be enough to flip a robot?
shockwave (LP flipper from team ocean) had about 60kg worth of flip and that could flip a FW oota. and that system didnt even have a buffer tank
seeing as a fw is 13kg, 60kg is plenty. BTW a 40mm bore ram at 10 bar is about 130kg of thrust. I think the trevor regs can go to 12bar, most can if you modify them, but your are then running stuff over their rated pressure, some valves might not like it.
so a 40mm bore ram at 12 bar should give a good hit, nice :)
hey alex you could always use my 80mm bore and maybe my 30mm bore ram.
trev regs will do anything 0-25 bar
Ben, what stroke are your rams? And I may just go for 20-30 mm bore ram so I have more hits...
if either of you are interested i've got a 40mm bore 50mm stroke 10 bar ram
Hmmm that's a little short for what I want, I was looking for about a 150mm stroke ram....
I'd say that's a little too large for a feather :PQuote:
Originally Posted by Bodge Job
Just to clarify Shockwaves specs as you mentioned earlier. Shockwaves pneumatics have remained unchanged since it became Eric Jr its a 40mm Bore 60mm Stroke ram and the max pressure is 11 bar set by the PRV.Quote:
Originally Posted by mattsdragons
Just need to get those blasted LED's hidden by the Robo-Coat before the next event :lol:
alex, my 30mm bore ram is 100mm stroke and the 80mm bore is 50mm stroke
Ahh, the 30mm bore 100mm stroke ram may work, but I thought u were using it for your fliper?
wait, i have done some more calculations, and that ram would only give me 6.43kg of lifting force, so i need a 50mm bore 100mm stroke ram..
http://www.northerntool.com/shop/tools/ ... uct%20Page
this may work, but its a shame its from the US... but its still only £30 ($50) including postage...
and a rack:http://www.beltingonline.com/1-5-mod...teel-rack-6801 and gear:http://www.technobotsonline.com/stee...-38-tooth.html that should give me just over 200 degrees of movement with 18kg of lifting force at the tip of the lifting bit...
I would have thought you would get more lifting force than that from a 40mm bore 10 bar ram
Yeh, buy with the gear ratio I'm using to get the 200 degrees movement, means I need a lot of power, and 40mm bore cant provide that...
I might get just enough if I run my system at 11.5 bar
yeah, but i haven't found any rams that work at that pressure...and i'm using quiet a long axe arm, so if you used a shorter one, it could work for you.