17-02-2013 13:41

Camren

Re: pic: 2528 RoboDoves 30 sec, 30 point climb

Does your pneumatic system have any leaks? 120 psi shouldn't take 1 minute to build.

17-02-2013 13:44

Team3266Spencer

Re: pic: 2528 RoboDoves 30 sec, 30 point climb

I can tell you it does if you have a lot of air tanks XD

17-02-2013 13:55

Yankeefan181

Re: pic: 2528 RoboDoves 30 sec, 30 point climb

You could always fill your tanks before the match too

17-02-2013 14:13

karpiron

Re: pic: 2528 RoboDoves 30 sec, 30 point climb

We carry 256 cu in air storage. Stroking a 2" x 24" and (2) 1.5" x 12" cylinders consumes A LOT of air. We have to wait a full minute.

17-02-2013 21:28

cmrnpizzo14

Re: pic: 2528 RoboDoves 30 sec, 30 point climb

How many tanks are you using to store that air?

18-02-2013 06:57

karpiron

Re: pic: 2528 RoboDoves 30 sec, 30 point climb

We've reduced our stored air capacity to 210 cu in.
(2) 41 cu in plastic, (2) 32 cu in ss and (4) 16 cu in ss tanks, tucked into various spaces. The waiting time is spaced between the strokes. 10 sec here, 10 sec there.
We'll post video later today.

18-02-2013 09:00

Bill_B

Re: pic: 2528 RoboDoves 30 sec, 30 point climb

Check the dimensions of your top box. It looks too tall to me. I'd hate for you to reach a competition where you didn't have the same room to extend inside the pyramid at the top.

Nice work on the 'bot, though, staying tuned for video.

18-02-2013 09:31

karpiron

Re: pic: 2528 RoboDoves 30 sec, 30 point climb

We were using 888's pyramid and we noted several dimensional deviations.
In the photo we are looking at that top clearance. We were well below the top of the upper bar.
That experience made us aware of our sensitivity to dimesional tolerance.

18-02-2013 15:48

karpiron

Re: pic: 2528 RoboDoves 30 sec, 30 point climb

Here's the link to ALBERT's test climb:
http://vimeo.com/59719661

18-02-2013 15:56

Andy A.

Re: pic: 2528 RoboDoves 30 sec, 30 point climb

Have you explored using a dual working pressure solution? Actuating the unloaded portion of a cylinders movement (in this case the extension) with lower pressure air, say 15psi, can result in some huge air savings while still allowing you to actuate at a full 60psi in the loaded direction (retraction).

It does require more overhead in the form of additional regulators, tubing, fittings, solenoids etc., but may allow you to climb faster and/or reduce your storage requirements.

18-02-2013 16:02

Madison

Re: pic: 2528 RoboDoves 30 sec, 30 point climb

Isn't it disingenuous to say that it climbs in 30 sec. if it cannot work without waiting for the air tanks to refill?

Am I missing something?

18-02-2013 16:08

karpiron

Re: pic: 2528 RoboDoves 30 sec, 30 point climb

Yes, we did.
Our concern was risking rotation of the 2" cylinder's main hook.
We operate at 45 psi and the hook is nicely firm; 20 psi doesn't have the same resistance to twist.
We couldn't find a 24" stroke gas spring.


Madison:
Deceptive maybe. not disingenuous.