Competitive Times for Nationals

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Re: Competitive Times for Nationals

Postby hippo9 » April 2nd, 2018, 9:27 pm

No definitely accuracy is more important than time, but still if you have multiple teams who are very accurate it could come down to time
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Re: Competitive Times for Nationals

Postby shrewdPanther46 » April 3rd, 2018, 5:56 am

Yea we kinda got carried away by speed. We are most likely not going to place high because of that. Our accuracy wavers at around less than 6-7 cm :(

Working on it though, we have plans to improve, but tbh, the teams that medal will all be under 3 cm for sure, maybe even 2. Between them, the fastest wins. I'm expecting 3 second cars under 2-3 cm will place.
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Re: Competitive Times for Nationals

Postby MadCow2357 » April 20th, 2018, 2:09 pm

You guys all make me feel bad :( . I have not even managed to get closer than 5cm, averaging around 30 cm off. I was celebrating when I got 9 cm off but after reading your posts :o ...

I think my accuracy is terrible because my car skids so much. It could be running straight as an arrow, but the wingnut brake engages and the whole thing fishtails. I have missed the center line bonus so many times because of this. Any ideas on reducing skid?

I think maybe reducing weight (and therefore momentum) might help. I am using T81 3 7/8 inch Banebots wheels.
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Re: Competitive Times for Nationals

Postby shrewdPanther46 » April 20th, 2018, 2:15 pm

I would say just reduce your speed. How fast is your car going? The car I'm running w/my partner rn is relatively fast but we can't notice any visible skidding, and we have no unique thing helping our car not skid
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Re: Competitive Times for Nationals

Postby MadCow2357 » April 20th, 2018, 2:18 pm

About 2.7 seconds. I can't change anything right now, as my states competition is tomorrow. But if my team makes it to nationals, I may try reducing speed to increase accuracy. I went overboard with the speed, too, like you had once said before.
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Re: Competitive Times for Nationals

Postby shrewdPanther46 » April 20th, 2018, 2:20 pm

Lol I feel you man.. speed is where its at ;)
If you decrease your speed and practice, I guarantee you it will work out. Dynamic braking might help... but we aren't using it because we are somewhat satisfied with what we have.

Edit: extra note, we were stuck at around 20 cm off for a really really really really long time. over time, when u practice, pay attention to what the issue is, and just keep trying small things to change it. One thing that impacted our car's accuracy for the very first time we run it after removing it from the box was the way we positioned the wingnut in the box. Theres a lot of factors to consider and account for
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Re: Competitive Times for Nationals

Postby MadCow2357 » April 20th, 2018, 6:06 pm

shrewdPanther46 wrote:Lol I feel you man.. speed is where its at ;)
If you decrease your speed and practice, I guarantee you it will work out. Dynamic braking might help... but we aren't using it because we are somewhat satisfied with what we have.

Edit: extra note, we were stuck at around 20 cm off for a really really really really long time. over time, when u practice, pay attention to what the issue is, and just keep trying small things to change it. One thing that impacted our car's accuracy for the very first time we run it after removing it from the box was the way we positioned the wingnut in the box. Theres a lot of factors to consider and account for

Thanks. You have no idea how much I have learned from you and the other guys on there forum. By the way, what is dynamic braking?

Wish me luck for tomorrow, I'll need it.
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Re: Competitive Times for Nationals

Postby windu34 » April 20th, 2018, 6:32 pm

MadCow2357 wrote:
shrewdPanther46 wrote:Lol I feel you man.. speed is where its at ;)
If you decrease your speed and practice, I guarantee you it will work out. Dynamic braking might help... but we aren't using it because we are somewhat satisfied with what we have.

Edit: extra note, we were stuck at around 20 cm off for a really really really really long time. over time, when u practice, pay attention to what the issue is, and just keep trying small things to change it. One thing that impacted our car's accuracy for the very first time we run it after removing it from the box was the way we positioned the wingnut in the box. Theres a lot of factors to consider and account for

Thanks. You have no idea how much I have learned from you and the other guys on there forum. By the way, what is dynamic braking?

Wish me luck for tomorrow, I'll need it.

I believe shrewdPanther46 is referring to introducing a braking force while the vehicle is still in motion, whether that be transferring kinetic energy into stored potential energy in the form of an elastic or spring, or turning off the motor to introduce the motors internal resistance to help slow the vehicle, or some other method other than only relying on the physical locking of the wingnut at the very end
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Re: Competitive Times for Nationals

Postby MadCow2357 » April 20th, 2018, 7:31 pm

windu34 wrote:
MadCow2357 wrote:
shrewdPanther46 wrote:Lol I feel you man.. speed is where its at ;)
If you decrease your speed and practice, I guarantee you it will work out. Dynamic braking might help... but we aren't using it because we are somewhat satisfied with what we have.

Edit: extra note, we were stuck at around 20 cm off for a really really really really long time. over time, when u practice, pay attention to what the issue is, and just keep trying small things to change it. One thing that impacted our car's accuracy for the very first time we run it after removing it from the box was the way we positioned the wingnut in the box. Theres a lot of factors to consider and account for

Thanks. You have no idea how much I have learned from you and the other guys on there forum. By the way, what is dynamic braking?

Wish me luck for tomorrow, I'll need it.

I believe shrewdPanther46 is referring to introducing a braking force while the vehicle is still in motion, whether that be transferring kinetic energy into stored potential energy in the form of an elastic or spring, or turning off the motor to introduce the motors internal resistance to help slow the vehicle, or some other method other than only relying on the physical locking of the wingnut at the very end

I have a spring between the wingnut and the stopping hex nut already, if you were recommending that. How would I have the micro switch activate earlier though? The wingnut would activate the switch as it traveled over, and then release the button as it passed over. In that case, the vehicle would slow down for a.second, and Jeep going. Or, the wingnut would completely lock against the roller part, tearing off the whole lever. Unless I use 2 microswitches...
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Re: Competitive Times for Nationals

Postby shrewdPanther46 » April 20th, 2018, 8:00 pm

Read through the brake system thread for advice
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Re: Competitive Times for Nationals

Postby shrewdPanther46 » April 30th, 2018, 8:29 am

Has anyone seen time scores under 4 points at competition? What were the best times of cars you have seen where the accuracy is still competitive?

I'm getting worried that the speed of my car will not suffice after my partner and I slowed it down for accuracy, so I would like to know the kind of times we will all be seeing at nationals.
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Re: Competitive Times for Nationals

Postby windu34 » April 30th, 2018, 9:27 am

MadCow2357 wrote:
windu34 wrote:
MadCow2357 wrote:Thanks. You have no idea how much I have learned from you and the other guys on there forum. By the way, what is dynamic braking?

Wish me luck for tomorrow, I'll need it.

I believe shrewdPanther46 is referring to introducing a braking force while the vehicle is still in motion, whether that be transferring kinetic energy into stored potential energy in the form of an elastic or spring, or turning off the motor to introduce the motors internal resistance to help slow the vehicle, or some other method other than only relying on the physical locking of the wingnut at the very end

I have a spring between the wingnut and the stopping hex nut already, if you were recommending that. How would I have the micro switch activate earlier though? The wingnut would activate the switch as it traveled over, and then release the button as it passed over. In that case, the vehicle would slow down for a.second, and Jeep going. Or, the wingnut would completely lock against the roller part, tearing off the whole lever. Unless I use 2 microswitches...

I would not recommend having a spring BETWEEN the wingnut and the locking end because it will not provide consistent locking position and will mess up the spring
You can extend the wingnut so it continues to cover the switch once the leading edge has pushed it (extend the lagging/rear edge)
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Re: Competitive Times for Nationals

Postby jcmarcus0816 » May 1st, 2018, 5:33 am

shrewdPanther46 wrote:Has anyone seen time scores under 4 points at competition? What were the best times of cars you have seen where the accuracy is still competitive?

I'm getting worried that the speed of my car will not suffice after my partner and I slowed it down for accuracy, so I would like to know the kind of times we will all be seeing at nationals.



My partner and I got a time score of a little over 5 at the Michigan state competition with a distance score of 8, and we got first. At one point we did have a time score of under four but the car skid so much that the consistency was completely wack. There are some ways you can get the car to take a longer time to slow down to reduce skidding but we did not have enough time, so we just slowed our car down to about 2.6 seconds. If I were you, I would just focus on accuracy and make sure your car can run under 3 seconds.

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Re: Competitive Times for Nationals

Postby shrewdPanther46 » May 1st, 2018, 5:56 am

jcmarcus0816 wrote:
shrewdPanther46 wrote:Has anyone seen time scores under 4 points at competition? What were the best times of cars you have seen where the accuracy is still competitive?

I'm getting worried that the speed of my car will not suffice after my partner and I slowed it down for accuracy, so I would like to know the kind of times we will all be seeing at nationals.



My partner and I got a time score of a little over 5 at the Michigan state competition with a distance score of 8, and we got first. At one point we did have a time score of under four but the car skid so much that the consistency was completely wack. There are some ways you can get the car to take a longer time to slow down to reduce skidding but we did not have enough time, so we just slowed our car down to about 2.6 seconds. If I were you, I would just focus on accuracy and make sure your car can run under 3 seconds.

Yea we are setting our car so that it brakes on average 1 meter prior to the distance, so we are still able to maintain good times. But yes, I certainly agree with you that accuracy is more important than speed.
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Re: Competitive Times for Nationals

Postby RyanMist » May 1st, 2018, 6:06 am

jcmarcus0816 wrote:
shrewdPanther46 wrote:Has anyone seen time scores under 4 points at competition? What were the best times of cars you have seen where the accuracy is still competitive?

I'm getting worried that the speed of my car will not suffice after my partner and I slowed it down for accuracy, so I would like to know the kind of times we will all be seeing at nationals.



My partner and I got a time score of a little over 5 at the Michigan state competition with a distance score of 8, and we got first. At one point we did have a time score of under four but the car skid so much that the consistency was completely wack. There are some ways you can get the car to take a longer time to slow down to reduce skidding but we did not have enough time, so we just slowed our car down to about 2.6 seconds. If I were you, I would just focus on accuracy and make sure your car can run under 3 seconds.

I don't compete in this event and I am not completely sure about the rules. I think our team got a negative number of points and we got 2nd at states. Again I am not sure if this is true but I'm pretty sure
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