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Unread 12-01-2010, 17:19
scorpions980 scorpions980 is offline
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buying new gyro

my team wants to buy a new gyroscope because the one that we have is twitchy. does anyone know if the gyros that we buy from the digikey website is the whole part with the circuit board and all the attached parts or if its just the little box without the circuit board. thank you in advance.

Last edited by scorpions980 : 13-01-2010 at 14:00.
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Unread 12-01-2010, 17:20
Andrew Schreiber Andrew Schreiber is offline
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Re: buying new gyro

Depends on what gyro you buy from Digikey. Before you buy a new one, what do you mean by "twitchy"?
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Unread 12-01-2010, 23:36
scorpions980 scorpions980 is offline
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Re: buying new gyro

there are times when it just stops and doesnt change even though the robot is spinning non stop or when it keeps going when the robot is not moving. though most of the time it works like normal sometimes it just spazzes out like that.
and most likely the ADXRS612BBGZ-RLCT-ND (part number).
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Unread 13-01-2010, 00:27
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Re: buying new gyro

They have a lot of good gyros at sparkfun.com both with and without breakout boards on them. Not only do they have good descriptions of exactly what you are getting, they also have lots of documentation and a good support community. Great site for many things robotic/sensor related! I got a gyro there once for a project and it definitely wasn't twitchy.
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Unread 13-01-2010, 02:54
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Re: buying new gyro

One year my old team (2342) broke one of the sensors in our KoP. We worked with another team in our area to get theirs. I think we ended up giving them a sensor they broke, and they gave us the one we broke. Both teams ended up with the sensors that they needed!
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Unread 13-01-2010, 07:11
Greg McKaskle Greg McKaskle is offline
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Re: buying new gyro

Without the robot moving or gyro moving, wiggle the wires along their length. It sounds like you may have a loose connection. Another test is to put the robot on blocks and run the motors. Is noise because of wire routing causing bad readings?

You may still decide to purchase a new gyro, but at least then, you'll know if it is just a cable or cable routing.

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Unread 13-01-2010, 19:41
scorpions980 scorpions980 is offline
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Re: buying new gyro

no all that is just fine, i believe that someone may have accidentally dropped it and damaged something. but besides this even if this works we dont want it spinning out of control during a match so we want to get a extra.
the extra is definately needed. i would highly appreciated if someone could point me in the right direction as a specific model that is comparable to the part (since it was donated by some company and getting anymore is impossible) AND is FRC approved.
preferably with the circuit board attached.

Last edited by scorpions980 : 13-01-2010 at 19:42. Reason: left out something
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Unread 18-01-2010, 14:04
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Re: buying new gyro

Why don't you just order a new gyro set from FIRST.
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Unread 18-01-2010, 18:47
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Re: buying new gyro

Quote:
Originally Posted by PortugazD.Ace View Post
Why don't you just order a new gyro set from FIRST.
Mostly because FIRST does not sell them.

The sensor boards are only available in the Kit of Parts. The supplier does not sell them either. If yours is missing or broken, the three options are:
  1. obtain a replacement from another team that isn't using theirs
  2. use a different sensor that is commercially available
  3. design the robot controls not to need that particular sensor
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Unread 18-01-2010, 19:08
EricVanWyk EricVanWyk is offline
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Re: buying new gyro

Quote:
Originally Posted by Alan Anderson View Post
Mostly because FIRST does not sell them.

The sensor boards are only available in the Kit of Parts. The supplier does not sell them either. If yours is missing or broken, the three options are:
  1. obtain a replacement from another team that isn't using theirs
  2. use a different sensor that is commercially available
  3. design the robot controls not to need that particular sensor
4. Make your own from the design packages that will be on the usfirst.org website as soon as I smack the webadmin hard enough.

In all actuality, #4 is a terrible option - it is way harder than going to SparkFun. But, it is the best I've managed with the current situation. Mostly I just provide them as educational tools.


Edit: *SMACK* http://usfirst.org/roboticsprograms/....aspx?id=16337

Edit Edit: Thanks Joe Ross! Now this years toys count too.

Last edited by EricVanWyk : 18-01-2010 at 20:33.
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Unread 18-01-2010, 20:20
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Re: buying new gyro

5. Use last year's gyro, since the design package was released per <R34>.
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