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GeeTwo 14-03-2015 00:09

Re: Ramps
 
Quote:

Originally Posted by s_forbes (Post 1457433)
But.... that sounds like the greatest thing imaginable!

As a designer, yes. From the GDC's perspective, not so much.

Quote:

Originally Posted by s_forbes (Post 1457433)
I would still argue that if a team designed a completely passive robot (no stored energy, no actuators, no battery, just a structure that you put on the field that helps an alliance) it should be permissible. The challenge that we were given at the beginning of build season requires that we score lots of points. If you can solve this challenge without using electrically stored energy or actuators, then you should be able to take that approach.

The GDC has decided to require a few components be connected in specific ways. This does not mean that you need to connect them to any actuators, unless I really missed something. Passive components are passive components, and are, by nature, not susceptible to being disabled. Or, as engunneer has posted:

Quote:

Originally Posted by engunneer (Post 1457435)
If you can make that machine, I'm sure you can find room for a minimal control system to make it legal. You don't have to use any wago terminals from the PDP.


cglrcng 14-03-2015 16:08

Re: Ramps
 
Quote:

Originally Posted by dkavanagh (Post 1457388)
We were at the Toronto East Regional yesterday and decided we also needed a tethered ramp. We decided to cut a grey tote and it worked out exceptionally well: https://www.youtube.com/watch?v=Vdb_uN4r8_Q

That is in the practice field. In competition, if we lined up with the end of the ramp, we could sit still and feed an internal stacker our robot employs. We're stacking at the speed of the human feed station! Once we sorted out some robot issues, our day turned out pretty well.

We used a braided nylon line for our tether. So far, no issues with it getting caught in the wheels.

David

________________________________
My main question would be, and has always firstly been....Did you then put the REQUIRED Robot # License Plate(s) of appropriate size on your tethered ramp?

As FRANK posted as a clarification earlier in the season..."....If someone has to follow a tether to figure out which robot the additional robot pc. belongs to it would be deemed ILLEGAL per the blue box." (Not the actual direct quote).

It is a simple solution to a simple problem. All Robot sections must be identifiable to team # as one ROBOT (no matter how many pcs. that Robot consists of).

I never argued that static tethered/leashed ramps were illegal. (Unless of course they are not properly identified per the Robot numbering rules, or part of someone elses static set of pre-fabricated holdout wt. per R17 only useable on their robot, or a section of their original Robot per R1).

Made at the event by a single - or multiple teams, inspected & weighed w/ someones Robot who uses it, and identified properly by whatever robot it is tethered/leashed to, should certainly satisfy all those rules IMHO (but, I'm not the rulemakers/decider)...It appears that proper Jury is still out by the Q & A as it still appears unanswered by a check moments ago.
_______________

That ramp appears to do the job perfectly as to getting the first tote on the field in a consistantly upright flat position. Good Job. (Still needs proper # plating though according to the published ruleset & supplementals).

dkavanagh 15-03-2015 12:28

Re: Ramps
 
Yes, we did add appropriate team number markings on all 4 sides of the ramp.
We also were allowed to detach the ramp for matches where we worked the landfill. We were told a simple re-inspection is required, but it's more of a formality.

EricH 15-03-2015 21:56

Re: Ramps
 
Quote:

Originally Posted by dkavanagh (Post 1457734)
We also were allowed to detach the ramp for matches where we worked the landfill. We were told a simple re-inspection is required, but it's more of a formality.

Talk to your LRI about the implications of T9 (especially the second sentence) on that ruling. You shouldn't need reinspection AT ALL if you were inspected with the ramp and haven't changed anything otherwise.

Just sayin'.

Al Skierkiewicz 16-03-2015 07:46

Re: Ramps
 
Eric et al,
You should read the Q&A for an explanation. If an attachment requires you to remove weight so that you can add it to stay under 120 lbs., then you are required to get an inspection. If you remove that attachment and then add something else, you need an inspection. See Q429. If you remove the added part to go back to your original configuration you must be reinspected.

Please be aware that this may come at a price. The required re-inspection will not hold up any matches. We will do what we can to accommodate teams who are making changes.

As always, this year's rules may not apply next year.

mac 16-03-2015 08:02

Re: Ramps
 
Quote:

Originally Posted by Sperkowsky (Post 1456126)
Do you have any recommendations for cheap light cable or wire. My first thought is red 16 or 14 gauge wire. But being I'm no mechanical expert I'm not sure if that's optimal.

Yes. Make sure you use solid wire. It will be easy to shape and form. It won't flex up on you. Thank You Thomas (just give me a crabcake) McCubbin

FrankJ 16-03-2015 11:11

Re: Ramps
 
Q461 has some application to teams giving other teams prefabricated parts. It is a little long so go read the link for your self. It essentially says team cannot share pre-fabricated parts. Team may assist other teams in fabricating parts at the competition. So based on this answer, you cannot tether your ramp to another teams robot. You can help them fabricate a ramp.

Please do not take this as my judgment to what was or was not legal at competitions I did not attend.

cgmv123 16-03-2015 11:17

Re: Ramps
 
Quote:

Originally Posted by mac (Post 1458094)
Yes. Make sure you use solid wire. It will be easy to shape and form. It won't flex up on you.

Solid wire will inevitably fail if it's used in an application where it can move (like almost anywhere on a robot, but especially as a tether, even if it's not carrying current). You want to use stranded wire.

Karthik 16-03-2015 11:50

Re: Ramps
 
Quote:

Originally Posted by FrankJ (Post 1458165)
Q461 has some application to teams giving other teams prefabricated parts. It is a little long so go read the link for your self. It essentially says team cannot share pre-fabricated parts. Team may assist other teams in fabricating parts at the competition. So based on this answer, you cannot tether your ramp to another teams robot. You can help them fabricate a ramp.

Please do not take this as my judgment to what was or was not at competitions I did not attend.

Here's the pertinent wording:

"Elements and assemblies built at the event by one team to give to another do not satisfy R1 above."

This is quite the interesting take. For the past 10 seasons we've had a specific subgroup on our team called a "Fix-It Crew" that goes around building parts for and helping teams in need. Many times teams have been so desperate that we've made parts for them (typically bumpers) without their help. I guess this is no longer legal.

Racer26 16-03-2015 12:11

Re: Ramps
 
Quote:

Originally Posted by Karthik (Post 1458186)
Here's the pertinent wording:

"Elements and assemblies built at the event by one team to give to another do not satisfy R1 above."

This is quite the interesting take. For the past 10 seasons we've had a specific subgroup on our team called a "Fix-It Crew" that goes around building parts for and helping teams in need. Many times teams have been so desperate that we've made parts for them (typically bumpers) without their help. I guess this is no longer legal.

I agree Karthik, this clarification certainly seems to outlaw actions which I have seen and/or participated in at nearly every FRC event I've ever been to.

There also seems to be a very difficult line in the sand to draw there between "A helped B build X at the event for B's robot" and "A built X for B at the event". It might sound on the surface like an easy distinction to draw, but to have an inspector actually try to enforce it?

RonnieS 16-03-2015 12:12

Re: Ramps
 
Quote:

Originally Posted by Karthik (Post 1458186)
Here's the pertinent wording:

"Elements and assemblies built at the event by one team to give to another do not satisfy R1 above."

This is quite the interesting take. For the past 10 seasons we've had a specific subgroup on our team called a "Fix-It Crew" that goes around building parts for and helping teams in need. Many times teams have been so desperate that we've made parts for them (typically bumpers) without their help. I guess this is no longer legal.

I would be very interested in getting a more direct answer to things like you mentioned your team does. I know we have the same "crew" and have helped team like that as well. I am not sure why this wouldn't be aloud...99% of the time, the teams requiring the extra help, aren't the ones competing to be on top. They are the ones just trying to make it to the field to do something at least. I mean this year, even if you give that team with a drive train a ramp to use, it will let them do way more than before; that shouldn't be discouraged.
-Ronnie

jvriezen 16-03-2015 12:19

Re: Ramps
 
Quote:

Originally Posted by Karthik (Post 1458186)
Here's the pertinent wording:

"Elements and assemblies built at the event by one team to give to another do not satisfy R1 above."

This is quite the interesting take. For the past 10 seasons we've had a specific subgroup on our team called a "Fix-It Crew" that goes around building parts for and helping teams in need. Many times teams have been so desperate that we've made parts for them (typically bumpers) without their help. I guess this is no longer legal.

I would like to see a future rule whereby at competition, any 'work' on the robot must involve at least two members of the robot's team, unless all members of the robot's team are already working on other parts of the robot or software. For example, if a veteran team is going to build bumpers for a rookie team at a regional, at least have two team members from the rookie team helping out, unless the team only has four members and they are all helping to build the drive train. Helping to build bumpers may be as simple as 'pull this fabric taut while I staple it' -- at least they see how it is done.

GreyingJay 16-03-2015 12:22

Re: Ramps
 
Quote:

Originally Posted by Racer26 (Post 1458194)
I agree Karthik, this clarification certainly seems to outlaw actions which I have seen and/or participated in at nearly every FRC event I've ever been to.

There also seems to be a very difficult line in the sand to draw there between "A helped B build X at the event for B's robot" and "A built X for B at the event". It might sound on the surface like an easy distinction to draw, but to have an inspector actually try to enforce it?

I guess it depends on the definition of "helped"?

If team B had one member involved in measuring, designing, applying fasteners... does that count as A helping team B?

If team B provides some amount of parts and materials, does that count?

Quote:

Originally Posted by jvriezen (Post 1458198)
I would like to see a future rule whereby at competition, any 'work' on the robot must involve at least two members of the robot's team, unless all members of the robot's team are already working on other parts of the robot or software. For example, if a veteran team is going to build bumpers for a rookie team at a regional, at least have two team members from the rookie team helping out, unless the team only has four members and they are all helping to build the drive train. Helping to build bumpers may be as simple as 'pull this fabric taut while I staple it' -- at least they see how it is done.

Ah, we both had the same idea but you beat me to it.

FrankJ 16-03-2015 12:32

Re: Ramps
 
Quote:

Originally Posted by Karthik (Post 1458186)
Here's the pertinent wording:
...
This is quite the interesting take. For the past 10 seasons we've had a specific subgroup on our team called a "Fix-It Crew" that goes around building parts for and helping teams in need. Many times teams have been so desperate that we've made parts for them (typically bumpers) without their help. I guess this is no longer legal.

I think you are correct. But if you had at least one member of the other team present and being taught even if your team was doing all the work it would meet the spirit and the letter of the rule. The old "teach a team to fish" adage."
I expect that is mostly what teams like yours does anyway.

rich2202 16-03-2015 12:37

Re: Ramps
 
Quote:

Originally Posted by Racer26 (Post 1458194)
"A helped B build X at the event for B's robot" and "A built X for B at the event".

Not much different from: Did a mentor build it, or did a mentor help a student build it.

IMHO: Bring along one member of Team B to help do what they can to build the part for Team B's Robot.

If Team B needs that much help, sometimes they don't have the ability to constructively help build the piece. Hopefully by bringing them along, the person learns something they can bring back to the Team when they build next year's robot.


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