Gyro Recommendation for Battle Robot

[Guanton75]

Hey there, we are working on making some improvements to our battle
robot, Redrum ICE (www.teamentropy.com). In an effort to reduce the
amount of over steer we get with the differential drive we are going
to add a gyro but due to the inversion of the feed back loop, if we
get flipped over, we need to have a remote gain control. We mix our
drive signals on board so we only need a gyro with a single channel
with a second for the gain. So, can anyone recommend a gyro that can
take G's and vibration, is single channel with a remote gain adjust on
a second channel? Cheep too of course!

Thanks,
Seth

PS sorry to be off topic but I know you guys know gyros.

[Gerry G]

GY-401 can't go wrong with that! and it's not too expensive.
"Guanton75" <Guanton75@yahoo.com> wrote in message
news:bf8a29a9.0309011912.5c806217@posting.google.c om...
> Hey there, we are working on making some improvements to our battle
> robot, Redrum ICE (www.teamentropy.com). In an effort to reduce the
> amount of over steer we get with the differential drive we are going
> to add a gyro but due to the inversion of the feed back loop, if we
> get flipped over, we need to have a remote gain control. We mix our
> drive signals on board so we only need a gyro with a single channel
> with a second for the gain. So, can anyone recommend a gyro that can
> take G's and vibration, is single channel with a remote gain adjust on
> a second channel? Cheep too of course!
>
> Thanks,
> Seth
>
> PS sorry to be off topic but I know you guys know gyros.

[F Boucher]

Why would you want to turn it off when you're flipped... the gyro will be
flipped with the robot... when our helis get inverted, we certainly does not
cut the gyro...

/fb

"Guanton75" <Guanton75@yahoo.com> wrote in message
news:bf8a29a9.0309011912.5c806217@posting.google.c om...
> Hey there, we are working on making some improvements to our battle
> robot, Redrum ICE (www.teamentropy.com). In an effort to reduce the
> amount of over steer we get with the differential drive we are going
> to add a gyro but due to the inversion of the feed back loop, if we
> get flipped over, we need to have a remote gain control. We mix our
> drive signals on board so we only need a gyro with a single channel
> with a second for the gain. So, can anyone recommend a gyro that can
> take G's and vibration, is single channel with a remote gain adjust on
> a second channel? Cheep too of course!
>
> Thanks,
> Seth
>
> PS sorry to be off topic but I know you guys know gyros.

[Guanton75]

I thought the exact same thing as you at first but there is a
difference in how a heli rotates and our battle robot rotates. We use
two drive motors and wheels that steel like a tank. The wheels come
out the top also which allow us to drive upside down. While the
bottom of the wheel is going forward the top of the wheel is going
backwards and this is where the inversion takes place. A left turn
right side up becomes a right turn when upside down (left and right
being in the perspective of the robot) so the gyro tells the wrong way
and all hell breaks loose. Interestingly enough when the bot is
upside down the steering is proper (unlike a heli) but the forward
backwards are inverted.

Gets confusing huh?
Thanks,
Seth

"F Boucher" <spam@me.com> wrote in message news:<_5x5b.2916$pi4.151826@wagner.videotron.net>...
> Why would you want to turn it off when you're flipped... the gyro will be
> flipped with the robot... when our helis get inverted, we certainly does not
> cut the gyro...
>
> /fb
>
> "Guanton75" <Guanton75@yahoo.com> wrote in message
> news:bf8a29a9.0309011912.5c806217@posting.google.c om...
> > Hey there, we are working on making some improvements to our battle
> > robot, Redrum ICE (www.teamentropy.com). In an effort to reduce the
> > amount of over steer we get with the differential drive we are going
> > to add a gyro but due to the inversion of the feed back loop, if we
> > get flipped over, we need to have a remote gain control. We mix our
> > drive signals on board so we only need a gyro with a single channel
> > with a second for the gain. So, can anyone recommend a gyro that can
> > take G's and vibration, is single channel with a remote gain adjust on
> > a second channel? Cheep too of course!
> >
> > Thanks,
> > Seth
> >
> > PS sorry to be off topic but I know you guys know gyros.

[Dan G.]

I would just do the reversing in software with the help of a mercury switch
or something that can detect right side-up or upside-down.

"Guanton75" <Guanton75@yahoo.com> wrote in message
news:bf8a29a9.0309041858.23ae9537@posting.google.c om...
> I thought the exact same thing as you at first but there is a
> difference in how a heli rotates and our battle robot rotates. We use
> two drive motors and wheels that steel like a tank. The wheels come
> out the top also which allow us to drive upside down. While the
> bottom of the wheel is going forward the top of the wheel is going
> backwards and this is where the inversion takes place. A left turn
> right side up becomes a right turn when upside down (left and right
> being in the perspective of the robot) so the gyro tells the wrong way
> and all hell breaks loose. Interestingly enough when the bot is
> upside down the steering is proper (unlike a heli) but the forward
> backwards are inverted.
>
> Gets confusing huh?
> Thanks,
> Seth
>
> "F Boucher" <spam@me.com> wrote in message
news:<_5x5b.2916$pi4.151826@wagner.videotron.net>...
> > Why would you want to turn it off when you're flipped... the gyro will
be
> > flipped with the robot... when our helis get inverted, we certainly does
not
> > cut the gyro...
> >
> > /fb
> >
> > "Guanton75" <Guanton75@yahoo.com> wrote in message
> > news:bf8a29a9.0309011912.5c806217@posting.google.c om...
> > > Hey there, we are working on making some improvements to our battle
> > > robot, Redrum ICE (www.teamentropy.com). In an effort to reduce the
> > > amount of over steer we get with the differential drive we are going
> > > to add a gyro but due to the inversion of the feed back loop, if we
> > > get flipped over, we need to have a remote gain control. We mix our
> > > drive signals on board so we only need a gyro with a single channel
> > > with a second for the gain. So, can anyone recommend a gyro that can
> > > take G's and vibration, is single channel with a remote gain adjust on
> > > a second channel? Cheep too of course!
> > >
> > > Thanks,
> > > Seth
> > >
> > > PS sorry to be off topic but I know you guys know gyros.

[Guanton75]

I would consider putting a switch on the remote incase we get flipped
but to just let gravity do it doesn't work well because you get thrown
around so much due to the fighting and in our case the gyroscopic
procession (see video at
http://www.litewav.com/combat/ncrsf/videos/ncrsf4/Clip99.mpg and in
that we are just fighting printers! I dunno who forgot to take the
toner out...). Also it's nice to not have everything automated since
simplicity = reliability and it we take damage someplace important we
may have to adopt some unconventional driving practices. There is
also the expense aspect, we have minimal programmable stuff on board
as that takes more $$$

Enjoy, Seth

"Dan G." <rsi_computersNOSPAM@hotmail.com> wrote in message news:<bj996n$gt4cf$1@ID-132181.news.uni-berlin.de>...
> I would just do the reversing in software with the help of a mercury switch
> or something that can detect right side-up or upside-down.
>
> "Guanton75" <Guanton75@yahoo.com> wrote in message
> news:bf8a29a9.0309041858.23ae9537@posting.google.c om...
> > I thought the exact same thing as you at first but there is a
> > difference in how a heli rotates and our battle robot rotates. We use
> > two drive motors and wheels that steel like a tank. The wheels come
> > out the top also which allow us to drive upside down. While the
> > bottom of the wheel is going forward the top of the wheel is going
> > backwards and this is where the inversion takes place. A left turn
> > right side up becomes a right turn when upside down (left and right
> > being in the perspective of the robot) so the gyro tells the wrong way
> > and all hell breaks loose. Interestingly enough when the bot is
> > upside down the steering is proper (unlike a heli) but the forward
> > backwards are inverted.
> >
> > Gets confusing huh?
> > Thanks,
> > Seth
> >
> > "F Boucher" <spam@me.com> wrote in message
> news:<_5x5b.2916$pi4.151826@wagner.videotron.net>...
> > > Why would you want to turn it off when you're flipped... the gyro will
> be
> > > flipped with the robot... when our helis get inverted, we certainly does
> not
> > > cut the gyro...
> > >
> > > /fb
> > >
> > > "Guanton75" <Guanton75@yahoo.com> wrote in message
> > > news:bf8a29a9.0309011912.5c806217@posting.google.c om...
> > > > Hey there, we are working on making some improvements to our battle
> > > > robot, Redrum ICE (www.teamentropy.com). In an effort to reduce the
> > > > amount of over steer we get with the differential drive we are going
> > > > to add a gyro but due to the inversion of the feed back loop, if we
> > > > get flipped over, we need to have a remote gain control. We mix our
> > > > drive signals on board so we only need a gyro with a single channel
> > > > with a second for the gain. So, can anyone recommend a gyro that can
> > > > take G's and vibration, is single channel with a remote gain adjust on
> > > > a second channel? Cheep too of course!
> > > >
> > > > Thanks,
> > > > Seth
> > > >
> > > > PS sorry to be off topic but I know you guys know gyros.

[F Boucher]

You're right, sorry I've talked to fast :p

"Guanton75" <Guanton75@yahoo.com> wrote in message
news:bf8a29a9.0309041858.23ae9537@posting.google.c om...
> I thought the exact same thing as you at first but there is a
> difference in how a heli rotates and our battle robot rotates. We use
> two drive motors and wheels that steel like a tank. The wheels come
> out the top also which allow us to drive upside down. While the
> bottom of the wheel is going forward the top of the wheel is going
> backwards and this is where the inversion takes place. A left turn
> right side up becomes a right turn when upside down (left and right
> being in the perspective of the robot) so the gyro tells the wrong way
> and all hell breaks loose. Interestingly enough when the bot is
> upside down the steering is proper (unlike a heli) but the forward
> backwards are inverted.
>
> Gets confusing huh?
> Thanks,
> Seth
>
> "F Boucher" <spam@me.com> wrote in message
news:<_5x5b.2916$pi4.151826@wagner.videotron.net>...
> > Why would you want to turn it off when you're flipped... the gyro will
be
> > flipped with the robot... when our helis get inverted, we certainly does
not
> > cut the gyro...
> >
> > /fb
> >
> > "Guanton75" <Guanton75@yahoo.com> wrote in message
> > news:bf8a29a9.0309011912.5c806217@posting.google.c om...
> > > Hey there, we are working on making some improvements to our battle
> > > robot, Redrum ICE (www.teamentropy.com). In an effort to reduce the
> > > amount of over steer we get with the differential drive we are going
> > > to add a gyro but due to the inversion of the feed back loop, if we
> > > get flipped over, we need to have a remote gain control. We mix our
> > > drive signals on board so we only need a gyro with a single channel
> > > with a second for the gain. So, can anyone recommend a gyro that can
> > > take G's and vibration, is single channel with a remote gain adjust on
> > > a second channel? Cheep too of course!
> > >
> > > Thanks,
> > > Seth
> > >
> > > PS sorry to be off topic but I know you guys know gyros.