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Unread 21-02-2005, 08:56
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Jeffrafa Jeffrafa is offline
Robotics Addict
AKA: Jeff Lewis
FRC #1425 (Error Code)
Team Role: Mentor
 
Join Date: Dec 2003
Rookie Year: 2004
Location: Wilsonville, OR
Posts: 165
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Re: Spotty Radio Communications!

I had noticed our pneumatics acting strangely and sort of spotty lately too.

I've only noticed when the bot is still and nothing is being driven, but two of our solenoid valves seem to trip occasionally, and neither are to their idle state (both are in their pneumatic position without power and flip briefly occasionally). One of them is a three position valve on our main boom that causes it to move just a quarter of an inch or so every once and awhile when it blips. The other is with the plastic festo valve, which seems to flip much more often in comparison, but never long enough to cause the pneumatics to really move, just enough to release a little air and spook you.

I am yet to relate this to a radio issue, although its something i'll look into before we ship. I also don't know if its related at all to the back-up battery, although i'm fairily sure ours was dead at the time - just to note.

I did look into it more after the festo valve was hooked up and was acting up much more frequently than the other had. The spike relay it was hooked up to seemed to flip states very briefly each time it happened (it was so brief i had to watch it through many occurances to finally spot the light change to confirm that it was an electronics/programming issue).

I'm glad i'm not the first to notice something odd with this, i'll look into if its a radio problem today and post back if I find out anything new.

--Jeff

<edit> A note after jeremy's post - i've experienced ours acting strangely both at our facility with no other robots around as well as at the scrimmage competition.

Our robot did however experience rather severe radio interference during the scrimmage - our first round out the robot drove into the center goal during autonomous, with no autonomous code of any kind. It also was extremely irratic and out of control the rest of the round - we ran into a number of other robots, even after hitting our disable button, and our robot did suffer damage as a result - making it immoble for the rest of the day.

- I urge teams to tether when not competing and double-check their channel whenever they run so that others may not encounter this problem! </edit>
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Last edited by Jeffrafa : 21-02-2005 at 09:03.