pnneumatic axe robots

[Bodge Job]

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...

[jonny]

Re: pnneumatic axe robots

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

[Bodge Job]

Re: pnneumatic axe robots

i didnt think so... but how do they make them air tight? and is there an alternitive to that method?

[jonny]

Re: pnneumatic axe robots

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

[razerdave]

Re: pnneumatic axe robots

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.

[maddox10]

Re: pnneumatic axe robots

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?

[Bodge Job]

Re: pnneumatic axe robots

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...

[maddox10]

Re: pnneumatic axe robots

I believe there was only 1 FP axe in use the last years, Obsidian. But that was a fully custom job.

[Bodge Job]

Re: pnneumatic axe robots

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!

[maddox10]

Re: pnneumatic axe robots

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.

[Bodge Job]

Re: pnneumatic axe robots

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

[Bodge Job]

Re: pnneumatic axe robots

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

[mattsdragons]

Re: pnneumatic axe robots

looks good, how are you doing your system?

i was thinking of going for something similar to how battle axe has it or shunt

[terry]

Re: pnneumatic axe robots

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.

[Laser]

Re: pnneumatic axe robots

looks nice alex, what CAD do you use?