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I have just finished editing a short video of our 2017 Robot Arm running through its program. The arm basically moves in the x,y plane only with a hand that can "pinch" the stacks of pennies, flip them, and eject them one at a time. This design finished 2nd at the Wright State Invitational but has been refined for higher scores. The YouTube link for the video is https://youtu.be/6R6HGl7f7Ow .

For the Georgia state tournament - thoughts? I've always seen it as both pennies are removed.

Unome wrote:For the Georgia state tournament - thoughts? I've always seen it as both pennies are removed.

i'm finding it hard to understand how overlapping pennies could be seen as anything other than under/above another penny, and therefore not being scored. I don't think the rule can get any more clear than that.

jnowens wrote:I have just finished editing a short video of our 2017 Robot Arm running through its program. The arm basically moves in the x,y plane only with a hand that can "pinch" the stacks of pennies, flip them, and eject them one at a time. This design finished 2nd at the Wright State Invitational but has been refined for higher scores. The YouTube link for the video is https://youtu.be/6R6HGl7f7Ow .

Looks familiar

Bazinga+ wrote:

jnowens wrote:I have just finished editing a short video of our 2017 Robot Arm running through its program. The arm basically moves in the x,y plane only with a hand that can "pinch" the stacks of pennies, flip them, and eject them one at a time. This design finished 2nd at the Wright State Invitational but has been refined for higher scores. The YouTube link for the video is https://youtu.be/6R6HGl7f7Ow .

Looks familiar

Have you seen this one yet? When I saw it at the competition I thought it looked pretty similar to the one you posted here a few months ago.

maxxxxx wrote:

Bazinga+ wrote:

jnowens wrote:I have just finished editing a short video of our 2017 Robot Arm running through its program. The arm basically moves in the x,y plane only with a hand that can "pinch" the stacks of pennies, flip them, and eject them one at a time. This design finished 2nd at the Wright State Invitational but has been refined for higher scores. The YouTube link for the video is https://youtu.be/6R6HGl7f7Ow .

Looks familiar

Have you seen this one yet? When I saw it at the competition I thought it looked pretty similar to the one you posted here a few months ago.

Yeah it seems a lot of teams use a similar end effector to that of my first arm. Not sure if they came up with it independently or based it off that arm.

The New York State competition had targets with plexiglass on top of them. Does anyone know if this will be similar at nationals? The smooth nature of it really helped my design for spreading the pennies.

Sabre wrote:The New York State competition had targets with plexiglass on top of them. Does anyone know if this will be similar at nationals? The smooth nature of it really helped my design for spreading the pennies.

Highly doubt nationals will be run that way because it makes it harder to identifiy which pennies are in vs out and that will be a major problem at nationals with teams getting very near perfect scores and depending on fractions of a millimeter to separate 1st through 6th

Sabre wrote:The New York State competition had targets with plexiglass on top of them. Does anyone know if this will be similar at nationals? The smooth nature of it really helped my design for spreading the pennies.

Although a clear plastic layer over the Competition Area would prevent damage to targets, I would not use them when supervising because they introduce parallax error. I expect many teams at nationals will attempt tight configurations of pennies, with many on or nearing borders of rings, and parallax complicates counting pennies as in or out.

I am new to Robotics and my team just assigned me to Robot Arm! I am planning on using an OWI kit from last year and modifying the end-effector. Obviously, I will not be competitive at States but I want to learn as much as possible. Any resources I should use or books I should read? Thank you