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Question bout flippers.
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marto
Experienced Roboteer


Joined: 08 Jul 2004
Posts: 5459
Location: Brisbane, QLD


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Yes the mitre 10 valve will work but IIRC it took quite a few seconds for daniels coke bottle lifter to raise up. It wasn't really a flipper. It also has a very small valve I think its like 2mm in diameter so that was the limiting factor. Not sure how air tight it was but I think in daniels case he filled it up like 30seconds before the fight so wasn't a big issue.

Steve
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Post Thu Feb 17, 2011 9:10 pm 
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Vignesh



Joined: 17 Jan 2011
Posts: 305
Location: Dandenong North Victoria


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If i use that valve does that mean i need to use a seperate way to retract the arm? And what is the solenoid in the truck originally used for? I would love to buy a 3/2 or 5/2 valve from someone for cheap.

Post Thu Feb 17, 2011 9:25 pm 
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Woody



Joined: 07 Oct 2004
Posts: 202
Location: UK


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The leverage ratio will vary throughout the stroke...but you should get a good approx by dividing the flipper tip travel by the rams stroke.

IE ..Flipper tip travel shut /open 420mm ...ram stroke 140mm
420/140 = 3 to 1

The ebay 5/2 valve is ...IMO... a good match for your ram.

You'd get approx 14 ram activations ...extend and retract... @ 10 bar from a 3.5 ounce paintball bottle.

Post Fri Feb 18, 2011 12:28 am 
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Vignesh



Joined: 17 Jan 2011
Posts: 305
Location: Dandenong North Victoria


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Would a 1.5kg fire extingusher work as the reservoir? And can i run it without a buffer tank.

Post Fri Feb 18, 2011 3:00 pm 
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Knightrous
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Joined: 15 Jun 2004
Posts: 8511
Location: NSW


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I'd start off with the fire extinguisher filled with compressed air. Pump it up to 150psi and off your go. Air isn't as good as CO2, but it's very easy, a bit safer and you can probably use it with all the garden valve equipment.
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Post Fri Feb 18, 2011 3:45 pm 
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Vignesh



Joined: 17 Jan 2011
Posts: 305
Location: Dandenong North Victoria


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Mmmm Ok ill take your word for it. I didnt see that u pmd me Cool How would i connect the tank to the 3/2 valve? Or does the QEV have all the stuff needed to join it together?

Post Fri Feb 18, 2011 3:51 pm 
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Vignesh



Joined: 17 Jan 2011
Posts: 305
Location: Dandenong North Victoria


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Does anyone know where i can get a valve like :
The valve thing on top of the extinguisher.
For a 1.5kg extinguisher
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Post Fri Feb 18, 2011 8:03 pm 
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Woody



Joined: 07 Oct 2004
Posts: 202
Location: UK


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Why?

Your 14 years old and this is your first bot ...why not just make a simple brick ... have some fun on the bot scene ...at a reasonable cost...gain experience ...then progress

I'd strongly recommend that if your going to use co2 that you copy an existing std setup based on paintball equipment ... see pic...but with a buffer tank.




Cheers Woody.


Last edited by Woody on Fri Feb 18, 2011 8:35 pm; edited 1 time in total

Post Fri Feb 18, 2011 8:31 pm 
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Vignesh



Joined: 17 Jan 2011
Posts: 305
Location: Dandenong North Victoria


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Aaron offered to give me a 1.5kg fire extinguisher 3 rams 1qev for free wo i thought i might utilise that. And well its not really my FIRST robot. I used to make maze bots, rubiks cube solver sudoku solver and robots like that
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Post Fri Feb 18, 2011 8:34 pm 
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Woody



Joined: 07 Oct 2004
Posts: 202
Location: UK


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1.5kg co2 extinguisher...or water or powder?
What physical size is it ...what does it weigh?

Great to be gifted these things but are they going to be any use to you?


Last edited by Woody on Fri Feb 18, 2011 8:41 pm; edited 1 time in total

Post Fri Feb 18, 2011 8:37 pm 
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Vignesh



Joined: 17 Jan 2011
Posts: 305
Location: Dandenong North Victoria


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Its empty. without a valve at the top
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Post Fri Feb 18, 2011 8:38 pm 
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Woody



Joined: 07 Oct 2004
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Location: UK


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20oz / 0.6kg co2 bottles are the biggest you'll squeeze into a feather.

Post Fri Feb 18, 2011 8:48 pm 
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Vignesh



Joined: 17 Jan 2011
Posts: 305
Location: Dandenong North Victoria


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What if i laid it diagonally? Still do you know where i could get a valve for it?
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Post Fri Feb 18, 2011 8:50 pm 
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Woody



Joined: 07 Oct 2004
Posts: 202
Location: UK


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I've found that ...over here ..the valves are difficult to obtain.

Internal Pic of Philips bot Marauder with 0.6kg bottles .

http://www.robowars.org/forum/album_pic.php?pic_id=1417



1.5KG'S is IMO ...just to BIG!

Remember that your building to a weight limit.

An optimist will tell you the glass is half-full; the pessimist, half-empty; and the bot builder will tell you that there is just to much glass.

Post Fri Feb 18, 2011 8:59 pm 
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Vignesh



Joined: 17 Jan 2011
Posts: 305
Location: Dandenong North Victoria


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1 thing i dont understand is... Does it start with 1.5kg or is it after you fill it up? I was just thinking of pumping air into it to 145 psi then testing.
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Post Fri Feb 18, 2011 9:57 pm 
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