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Unread 23-06-2002, 23:00
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Goal construction

Posted by CArobot at 1/15/2001 5:18 PM EST


Other on team #619, CArobot, from Charlottesville Albemarle.



How are the top of the goal frames held together? Are there bolts, screws, or glue etc.?


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Re: Goal construction

Posted by Marjory "Frosty" Stager at 1/15/2001 5:26 PM EST


Student on team #47, ChiefDelphi, from Pontiac Central and Delphi Automotive Systems.


In Reply to: Goal construction
Posted by CArobot on 1/15/2001 5:18 PM EST:



: How are the top of the goal frames held together? Are there bolts, screws, or glue etc.?

We glued them in with some kind of glue that melts the plastic a little bit.



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Re: Goal construction

Posted by CArobot at 1/15/2001 5:30 PM EST


Other on team #619, CArobot, from Charlottesville Albemarle.


In Reply to: Re: Goal construction
Posted by Marjory on 1/15/2001 5:26 PM EST:



How are the tops of the goals held together during the actual competition? Do you know if glue, or bolts, or screws are used?





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Re: Goal construction

Posted by Marjory "Frosty" Stager at 1/15/2001 5:43 PM EST


Student on team #47, ChiefDelphi, from Pontiac Central and Delphi Automotive Systems.


In Reply to: Re: Goal construction
Posted by CArobot on 1/15/2001 5:30 PM EST:



: How are the tops of the goals held together during the actual competition? Do you know if glue, or bolts, or screws are used?


I don't think so.... we build our field to be just like what it will be in competition... so that the drivers can get a feel for the field.


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epoxy...

Posted by rebecca at 1/16/2001 3:01 AM EST


Student on team #192, gunn robotics team, from gunn high school.


In Reply to: Re: Goal construction
Posted by Marjory on 1/15/2001 5:43 PM EST:



you know, it's interesting... i dont think pvc epoxy (the stuff that plumbers use) is listed in the goal construction, yet we went ahead and used it anyway. If the goals in competition are going to come apart as easily as ours did before the glue, that could pose a real issue. just in dragging ours around, they came apart.

becca

: : How are the tops of the goals held together during the actual competition? Do you know if glue, or bolts, or screws are used?

:
: I don't think so.... we build our field to be just like what it will be in competition... so that the drivers can get a feel for the field.


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Re: epoxy...

Posted by Ed Sparks at 1/16/2001 7:55 AM EST


Coach on team #34, The Rockets, from Bob Jones High / New Century High and DaimlerChrysler.


In Reply to: epoxy...
Posted by rebecca on 1/16/2001 3:01 AM EST:



Glue is a fastener which makes it legal in any amount. Glue your goal together ! Use PVC cement found in any hardware store.


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Re: epoxy...

Posted by Matt Leese at 1/16/2001 12:21 PM EST


Other on team #73, Tigerbolt, from Edison Technical HS and Alstom & Rochester Institute of Technology.


In Reply to: Re: epoxy...
Posted by Ed Sparks on 1/16/2001 7:55 AM EST:



Um, since when did stuff you use on the GOAL have to come from Small Parts or the Additional Hardware List? I always figured that since we don't put the goal into competition I could make it out of toilet paper rolls if I want.........

Matt


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Mini model... hehe

Posted by Rob DeCotiis at 1/16/2001 6:11 PM EST


Student on team #504, RoBUCtics, from Red Bank Regional High School and Jesel.


In Reply to: Re: epoxy...
Posted by Matt Leese on 1/16/2001 12:21 PM EST:



good idea, matt, im gonna make a mini model out of toilet paper rolls.... hahahahaha
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Re: Mini model... hehe

Posted by Justin Stiltner at 1/16/2001 11:56 PM EST


Student on team #388, Epsilon, from Grundy High School and NASA, American Electric Power, Town of Grundy.


In Reply to: Mini model... hehe
Posted by Rob DeCotiis on 1/16/2001 6:11 PM EST:



: good idea, matt, im gonna make a mini model out of toilet paper rolls.... hahahahaha


To use the pvc glue you want to sand both the inside of the fitting and the pipe you plan to put into it. Then after both have been roughed up apply a good amount into the fitting where the pipe will be and onto the pipe where the fitting will be. This must be done quickly as this glue sets up fast. What you want to do now is kinda tricky you want to push the pipe (or fitting wich ever is easyer to move at the time) HARD onto the other peice while giving it aobut a 1/4 of a turn. At this point you shouldent be able to turn it anymore or pull it back off so make shure that when you turn it, the fitting/pipe is in the correct alignment.

He He insted of doing this we had a local lumber yard loan us the fittings and we take them back to them when we are done with them. We just use 3"wide electrical tape to hold them togetehr (and a big hammer HE HE).

hope this helps


Justin Stiltner
Team #388
Epsilon
Grundy Va,


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Re: epoxy...

Posted by ChrisH at 1/16/2001 11:59 AM EST


Engineer on team #330, Beach 'Bots, from Hope Chapel Academy and NASA JPL, J & F Machine, Raetheon, et al.


In Reply to: epoxy...
Posted by rebecca on 1/16/2001 3:01 AM EST:



: you know, it's interesting... i dont think pvc epoxy (the stuff that plumbers use) is listed in the goal construction, yet we went ahead and used it anyway. If the goals in competition are going to come apart as easily as ours did before the glue, that could pose a real issue. just in dragging ours around, they came apart.

: becca

For goal construction and PVC joints you don't want to have come apart on your robot use PVC cement from the hardware store. Epoxy doesn't bond well to PVC.

Last year we had a few joints on our ball hopper that we needed to be able to take apart in case of repairs. For those we found a self tapping screw through both the fitting and the pipe worked well. Just be sure the screw hits both!

As Ed Sparks points out, both are considered fasteners and are therefore on the additional materials list.

Take your Pick

Chris Husmann, PE
Team 330 Beach 'Bots
and real life Composites Engineer





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Re: Goal construction

Posted by Ken Leung at 1/16/2001 2:16 AM EST


Student on team #192, Gunn Robotics Team, from Henry M. Gunn Senior High School.


In Reply to: Re: Goal construction
Posted by CArobot on 1/15/2001 5:30 PM EST:



: How are the tops of the goals held together during the actual competition? Do you know if glue, or bolts, or screws are used?


I think they are going to use glue or some sort, maybe even just tight fit between the PVC's. Why? I think they don't want a strong connection on top, so when the goal come right down, the PVC will only disconnect instead of breaking apart. This way, they don't have to replace goals as much. All it need to do is to hold together when the big ball is up there or when robots are pushing the goal around by holding on the PVC.


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