Battery Buggy B

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MadCow2357
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Re: Battery Buggy B

Postby MadCow2357 » September 25th, 2018, 4:39 pm

waffletree wrote:
MadCow2357 wrote:Last year, I used a kind of scale for brake setting. It was basically a cut up centimeter ruler stuck onto my stopping rod. I'm wondering how much of a difference in accuracy is there between counting the rotations and using a scale like I did. :?:

Pretty sure that spinning it would be just a little more accurate the using the ruler since there's a bit less space for error?
like if on the bumpy ride to competition, the ruler gets messed up a tiny bit there would be a huge difference...which could cost you a few placings

The ruler itself was firmly hot glued to the stopping rod, so what you stated is not really a problem. I think the problem may be that the threaded rod's thread intervals are not small enough, causing the brake settings to be inaccurate...
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Re: Battery Buggy B

Postby sciolyperson1 » September 25th, 2018, 4:55 pm

MadCow2357 wrote:The ruler itself was firmly hot glued to the stopping rod...


Hot glue melts under heat - if you leave your car outside, if its in the trunk of the car or the bottom of a bus, it'll melt.
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Re: Battery Buggy B

Postby retired1 » September 25th, 2018, 6:08 pm

There are typically 3 different melt points available with hot melt glue. If you have the high temp one, you probably would not have a problem. It does warrant doing some testing to be positive. Epoxy is an alternative?

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Re: Battery Buggy B

Postby windu34 » September 26th, 2018, 11:35 am

sciolyperson1 wrote:firmly hot glued

This is an oxymoron if Ive ever seen one. Hot glue is NOT permanent and should NOT be used if you want any degree of dependable structural integrity. I would recommend the following alternatives (in order of permanency):
JB-Weld SteelStik
JB-Weld Clear Epoxy
Bob Smith Cyanoacrelate
DISCLAIMER: If you use the SteelStik, PLEASE WEAR GLOVES.
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Re: Battery Buggy B

Postby megrimlockawesom » September 27th, 2018, 6:27 am

Looks intresting. Too bad I am in Div C this year :(
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Re: Battery Buggy B

Postby TheRealToast » September 30th, 2018, 4:01 pm

windu34 wrote:
sciolyperson1 wrote:firmly hot glued

This is an oxymoron if Ive ever seen one. Hot glue is NOT permanent and should NOT be used if you want any degree of dependable structural integrity. I would recommend the following alternatives (in order of permanency):
JB-Weld SteelStik
JB-Weld Clear Epoxy
Bob Smith Cyanoacrelate
DISCLAIMER: If you use the SteelStik, PLEASE WEAR GLOVES.


Wouldn't the hot glue get into the motor if you hot glue the motor? (just wondering)
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Re: Battery Buggy B

Postby TheChiScientist » September 30th, 2018, 4:41 pm

TheRealToast wrote:
windu34 wrote:
sciolyperson1 wrote:firmly hot glued

This is an oxymoron if Ive ever seen one. Hot glue is NOT permanent and should NOT be used if you want any degree of dependable structural integrity. I would recommend the following alternatives (in order of permanency):
JB-Weld SteelStik
JB-Weld Clear Epoxy
Bob Smith Cyanoacrelate
DISCLAIMER: If you use the SteelStik, PLEASE WEAR GLOVES.


Wouldn't the hot glue get into the motor if you hot glue the motor? (just wondering)

AHHHHHHHH!!!!! HOT GLUE EQUAL THIS=[Unnecessary video removed due to complaint, depicts an underwater explosion with potentially offensive audio]
Trust me. From hovercraft, this can lead to critical failure if you use hot glue.
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Re: Battery Buggy B

Postby waffletree » September 30th, 2018, 5:24 pm

Hot glue melts everything you work with if you're not careful
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Re: Battery Buggy B

Postby windu34 » September 30th, 2018, 8:25 pm

TheRealToast wrote:
windu34 wrote:
sciolyperson1 wrote:firmly hot glued

This is an oxymoron if Ive ever seen one. Hot glue is NOT permanent and should NOT be used if you want any degree of dependable structural integrity. I would recommend the following alternatives (in order of permanency):
JB-Weld SteelStik
JB-Weld Clear Epoxy
Bob Smith Cyanoacrelate
DISCLAIMER: If you use the SteelStik, PLEASE WEAR GLOVES.


Wouldn't the hot glue get into the motor if you hot glue the motor? (just wondering)

Depends on how sealed the motor housing is, but i suppose it is possible. First of all, you should never be using hot glue to secure your motor. I would even be cautious with 3D printed parts or plastic as a housing because it could deform slightly and mess up the alignment. Most people use a metal piece to hold their motor in place.
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Re: Battery Buggy B

Postby Crimesolver » October 4th, 2018, 5:56 pm

Would it be recommended to make the car faster or more resistance to force? In other words, should I have a gear train where the drive gear is smaller or larger than the driven gear?
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Re: Battery Buggy B

Postby MadCow2357 » October 5th, 2018, 9:51 am

TheRealToast wrote:
windu34 wrote:
sciolyperson1 wrote:firmly hot glued

This is an oxymoron if Ive ever seen one. Hot glue is NOT permanent and should NOT be used if you want any degree of dependable structural integrity. I would recommend the following alternatives (in order of permanency):
JB-Weld SteelStik
JB-Weld Clear Epoxy
Bob Smith Cyanoacrelate
DISCLAIMER: If you use the SteelStik, PLEASE WEAR GLOVES.


Wouldn't the hot glue get into the motor if you hot glue the motor? (just wondering)

Just to be clear, I glued the cut up ruler that was my brake setting scale, not the motor :P . I used a Pololu 25D mounting bracket for my motor.
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Re: Battery Buggy B

Postby DragoXqwas » October 14th, 2018, 10:08 am

So I'm kinda confused as to how y'all are supposed to use a caliper for steering
i dont understand how it steers

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Re: Battery Buggy B

Postby SPP SciO » October 14th, 2018, 1:39 pm

DragoXqwas wrote:So I'm kinda confused as to how y'all are supposed to use a caliper for steering
i dont understand how it steers


The car will travel in some sort of arc if the two axles aren't perfectly parallel. A small change in the relative position of the axle will produce a big change in the path the vehicle takes. By physically attaching a caliper to the axle, you could actually measure these very small changes that wouldn't be reproducible with another adjustment system.

With that being said - it's certainly not the only way to adjust steering on a battery buggy. There are other ways that are probably less precise ultimately, but much easier to implement.
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Re: Battery Buggy B

Postby Rezilient » October 27th, 2018, 8:47 am

QUESTIONS
1.Can we use turning mechanisms from an r/c car?
2.Can we use a programmed motor like mindstorm?
3.Does the car have to be perfectly straight perpendicular to starting line or can it start at an angle?

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Re: Battery Buggy B

Postby sciolyperson1 » October 27th, 2018, 11:57 am

Rezilient wrote:QUESTIONS
1.Can we use turning mechanisms from an r/c car?
2.Can we use a programmed motor like mindstorm?
3.Does the car have to be perfectly straight perpendicular to starting line or can it start at an angle?


1) if the turning mechanism are gears or mechanical, yes. If they're electrical, no.
2) No.
3) It can start at an angle.
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