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-   -   Interesting Q/A's (http://www.chiefdelphi.com/forums/showthread.php?t=42625)

Billfred 23-02-2006 16:28

Re: Interesting Q/A's
 
Hey! They answered the question on everyone's minds (other than why Dave wasn't wearing a Hawaiian shirt at Kickoff):

Quote:

Originally Posted by Question
How is FIRST going to measure ball speed as it comes out of the shooter? Thanks.

Quote:

Originally Posted by Answer
FIRST is planning to use a two-point infrared speed trap to determine ball exit velocity. These units will be delivered to each competition site.

(And thanks for the props. I figured that Super Secret Widget of Graciously Professional Doom was more fun to say than "hopper." ;) )

Rich Wong 23-02-2006 17:28

Re: Interesting Q/A's
 
Quote:

Originally Posted by Billfred
Originally Posted by Question
How is FIRST going to measure ball speed as it comes out of the shooter? Thanks.

Quote:
Originally Posted by Answer
FIRST is planning to use a two-point infrared speed trap to determine ball exit velocity. These units will be delivered to each competition site.

Does the "Speed Trap" come with an Official State Trooper????
Do you get a ticket or just a warming????
(this is what happens to your brain after the shipoff- still trying to recover)
;)

AmyPrib 23-02-2006 17:58

Re: Interesting Q/A's
 
Here's the other question on the mind.

Quote:

Question:
Redbot is serving as their alliance backbot. It dies and is a sitting duck, still in legal backbot position.

Bluebot comes over and decides to use a strategy of pushing dead redduck into a non-legal backbot position in order to get penalties assessed to RedAlliance every 5 seconds.

Is this a legal strategy on BlueBots part?

The debate comes from the implication of G26 in that Bluebot would be wasting their time in trying to prevent RedBot from getting to their backbot position. It implies that because Bluebot is causing the "infraction", there is no penalty assessed to Redbot.

Would the same concept of "cause of infraction" imply in the dead duck case?
Thanks in advance.

Answer:
It is contrary to the intent of the game to gain advantage by using a dead robot as a tool to force the other alliance to incur penalties. A backbot that is prevented by another robot from crossing the center line - or is pushed off-sides - will not incur a penalty.

Also note that each alliance gets to choose which robot is assigned as their backbot. In this example, the red alliance gets to choose which robot is assigned as the backbot. They cannot be forced into making this decision by blue alliance attempts to move the dead red robot.
HOWEVER:
Quote:

Question:
Clarification from here: http://forums.usfirst.org/showthread.php?t=732

In this instance, would RedAlliance have to either move the dead redbot back into backbot position or have another robot become backbot, or would they no longer be responsible to do this since BlueAlliance pushed the dead bot across the line?

Answer:
The red alliance would not be penalized, but they would have to act to restore a valid backbot. In this instance, once the blue robot stopped pushing the dead red robot, the red alliance would have to either push the dead red robot back across the center line or move another red robot across the center line to become the backbot. The choice of these options is up to the red alliance. The red alliance would not be penalized for the momentary period when three red robots are on the same side of the field between the time the blue robot stopped pushing the red dead robot and the red alliances attempts to position their backbot, for the reasons cited in this question/answer.
So, no penalty as long as you're showing the intent to make a backbot, no matter how you do it. If opponent pushed your robot across the line, it should be doable to push him back. Just make sure your bot dies near the glass, so it takes them forever to push them across.

I sure hope this situation won't happen. Waste a bunch of time for both alliances.

Ethulin 27-02-2006 23:25

Re: Interesting Q/A's
 
Question:
Quote:

I can see this happening at regionals and I want to know how it will be dealt with.

Lets say blueBOT1 has a defensive autonomous and redBOT1 has a shooter autonomous. BlueBOT1 has a ramming auto where they shoot straight across the field and they want to ram redBOT1. Now blueBOT1 will not place their bot until redBOT1 places their bot, and neither will redBOT1.
Answer:
Quote:

Prior to setting up on the field, each team will inform the queuing manager in which Starting Zone they intend to place their robot. Once the team has recorded their choice with the queuing manager, it may not be changed.

Jon K. 28-02-2006 00:14

Re: Interesting Q/A's
 
Quote:

Originally Posted by Ethulin
Question:

Answer:

But who gets to jockey there bot's position last? At the Winter Warzone Scrimmage they had the red alliance change their position within the bos last during finals but what about qualifiers?

Donut 28-02-2006 00:23

Re: Interesting Q/A's
 
Quote:

Originally Posted by Jon K.
But who gets to jockey there bot's position last? At the Winter Warzone Scrimmage they had the red alliance change their position within the bos last during finals but what about qualifiers?

During finals, they have said the higher ranking team gets last positioning of robots.

In qualifiers I suppose they'll just have to flip a coin.

Ethulin 28-02-2006 00:26

Re: Interesting Q/A's
 
Quote:

Originally Posted by Jon K.
But who gets to jockey there bot's position last? At the Winter Warzone Scrimmage they had the red alliance change their position within the bos last during finals but what about qualifiers?

The point is NO ONE DOES. You have to tell the field manager what position all your bots will be in BEFORE you put them out. So pretty much you put them out blind to where the other alliance is putting their's. This is for qualifiers.

AmyPrib 28-02-2006 00:29

Re: Interesting Q/A's
 
Quote:

Originally Posted by Jon K.
But who gets to jockey there bot's position last? At the Winter Warzone Scrimmage they had the red alliance change their position within the bos last during finals but what about qualifiers?

I thought that the jockeying only occurred in elimination rounds, depending on who was the higher ranked alliance, they got to place after the other alliance in the first match, then second match they switched. If there was a tiebreaker 3rd match, I forget what happened, maybe just the same as 1st match.

I don't know if there was any jockeying for qual matches, I don't think there was any rule about it. It seemed sometimes teams would hang back until they saw where the others were being placed, but sounds like this year when you get queued up you will have to tell the queuer, so that on-field jockeying shouldn't occur. Wonder if they will have anyone enforcing that as the robots go onto the field.

Edit: Good grief, 2 other posts during mine.

And ps. I wouldn't use the "ram" word lightly. The ramming penalties still apply during automode, so don't expect to have a "ramming" automode and get away with it too easily.

Ethulin 28-02-2006 00:32

Re: Interesting Q/A's
 
Quote:

Originally Posted by AmyPrib
Edit: Good grief, 2 other posts during mine.

No robots left... nothing better to do!

AmyPrib 28-02-2006 00:38

Re: Interesting Q/A's
 
Hm.

Quote:

Question:
When determining robot height are the balls considered "part of the robot"? Section 3.3 of the rules indicate that the balls are “scoring objects” and part of the field equipment, not part of the robot. This Q&A leaves a bit of ambiguity. Specifically, could you please clarify:

- at the start of the match, if a robot is less than 60 inches tall, may balls stacked in the robot exceed the 60" height limit and still meet the requirements of Rule <G12> and <R05>?

- during the match, if a robot is less than 60 inches tall, may balls stacked in the robot exceed the 60" height limit and still meet the requirements of Rule <R08>?

Answer:
For part 1, "No" per <G13>.

For part 2, "Yes."
Not certain why it's ok during the match but not at the start of the match. But ok.

Joel J 28-02-2006 00:42

Re: Interesting Q/A's
 
Make a couple BCD switches and place them on your OI. Select your opponents position just before autonomous begins.

Ethulin 28-02-2006 00:52

Re: Interesting Q/A's
 
Quote:

Originally Posted by Joel J.
Make a couple BCD switches and place them on your OI. Select your opponents position just before autonomous begins.

Ha! I was not going to say it but that is what we were gonna do!

DjAlamose 28-02-2006 12:57

Re: Interesting Q/A's - Chicken
 
Quote:

Originally Posted by FRC492
I can see this happening at regionals and I want to know how it will be dealt with.

Lets say blueBOT1 has a defensive autonomous and redBOT1 has a shooter autonomous. BlueBOT1 has a ramming auto where they shoot straight across the field and they want to ram redBOT1. Now blueBOT1 will not place their bot until redBOT1 places their bot, and neither will redBOT1.

How will this be dealt with?

Quote:

Originally Posted by GDC
Prior to setting up on the field, each team will inform the queuing manager in which Starting Zone they intend to place their robot. Once the team has recorded their choice with the queuing manager, it may not be changed.

I'm not likening this. This means there could be more penalties and other small stupid quarrels about "O he wasn't in the right position". But then I do see the good in it. I like the intent but that puts even more work on the queuing manager. Hmm. I hope teams are prepared to talk about strategy before they get up in line...

DjAlamose 28-02-2006 13:01

Re: Interesting Q/A's
 
Quote:

Originally Posted by GDC
Answers on the Q&A system are not official rules. However, they are determinations of how the rules will be interpreted by competition authorities. When necessary, the Q&A answers are used as the basis for decisions by the judges, inspectors and referees (who are provided with the Q&A system responses as guidance). Please refer to this question/answer for further information.

In this particular case, the previous answer provided was unambiguous. Flag holders with lightening holes will be determined to be non-compliant, and must be replaced.

:ahh: :ahh: :ahh: :ahh: :ahh:
Hold on one second! We have been told to hold the FIRST Q&As answers to be rules not interpretations! WHAT IS GOING ON!

AmyPrib 28-02-2006 13:50

Re: Interesting Q/A's
 
I don't really understand this.

Either they are official, or they are not. They can't be UNofficial and then be used by all the refs/judges/inspectors as a basis to make calls against something. That just doesn't make sense to me.

There are a lot of good questions in the Q/As that were never released in Updates, but probably should be to be "official". There's a lot of good game/rules Q/As, but not a lot of game/rules updates. If we're going to have a Q/A to clarify the written rules or settle interpretation differences, then why can't they be official rules or incorporated into updates...

This implies Q/As are official:
Quote:

When necessary, the Q&A answers are used as the basis for decisions by the judges, inspectors and referees (who are provided with the Q&A system responses as guidance).
Yet they say they are not official.
So basically, "when necessay" is when we see a call made that goes against what the Q/A system says, then we can whip them out of our back pocket and show where we justify our argument.

So maybe they aren't official "rules", but they will be considered official "rulings" when the time comes. To me, it's the same thing I guess.

Steve W 28-02-2006 14:00

Re: Interesting Q/A's
 
I was the one who asked the question. I also know that you are not allowed to bring rules to the refs. Inspectors may be another issue. I also stated in my question that only an answer in the official updates would be a valid response. How can something that is not official state that they have the official interpretations? Last year teams were told that it didn't matter what the Q&A said it was only the official updates that mattered. I was trying to clarify that this year but seem to have only muddied the water.

AmyPrib 28-02-2006 14:05

Re: Interesting Q/A's
 
Quote:

Originally Posted by Steve W
I was the one who asked the question. I also know that you are not allowed to bring rules to the refs. Inspectors may be another issue. I also stated in my question that only an answer in the official updates would be a valid response. How can something that is not official state that they have the official interpretations? Last year teams were told that it didn't matter what the Q&A said it was only the official updates that mattered. I was trying to clarify that this year but seem to have only muddied the water.

They said in the referenced link to your question that if you want to show the officials the Q/As, then to print them out and take them with you. So long as it's a student driver/operator/HP, they should be able to show them the Q/As and get some consideration. Of course, I'm sure that may depend on the nature of the head ref... but I would hope that FIRST tells them in their training to at least be willing to review something.
http://forums.usfirst.org/showthread.php?t=428
While they say they aren't official rules, they can use them to make official calls.

Quote:

It may be something new but I have seen people approach the head ref with rules in hand and they were sent away.
Like I said, might depend on the head ref's nature as it has in the past, but I would hope Ref training smooths that out.

Steve W 28-02-2006 14:15

Re: Interesting Q/A's
 
Quote:

Originally Posted by AmyPrib
They said in the referenced link to your question that if you want to show the officials the Q/As, then to print them out and take them with you. So long as it's a student driver/operator/HP, they should be able to show them the Q/As and get some consideration. Of course, I'm sure that may depend on the nature of the head ref... but I would hope that FIRST tells them in their training to at least be willing to review something.
http://forums.usfirst.org/showthread.php?t=428
While they say they aren't official rules, they can use them to make official calls.

It may be something new but I have seen people approach the head ref with rules in hand and they were sent away.

Jon K. 28-02-2006 21:56

Re: Interesting Q/A's
 
Quote:

Originally Posted by Steve W
It may be something new but I have seen people approach the head ref with rules in hand and they were sent away.

I have never had a bad expierence with a head ref where they just sent away a student, so long as the student stays calm and collected a ref is usually willing to listen to anything, just don't question the call so much as ask them to explain it, and then try to argue it (maybe)

Steve W 01-03-2006 07:38

Re: Interesting Q/A's
 
Quote:

Originally Posted by Jon K.
I have never had a bad expierence with a head ref where they just sent away a student, so long as the student stays calm and collected a ref is usually willing to listen to anything, just don't question the call so much as ask them to explain it, and then try to argue it (maybe)

I agree that head refs are great to talk with and explaining calls. If however someone comes up with rules in hand, that is another issue.

Billfred 07-03-2006 09:43

Re: Interesting Q/A's
 
Yet another Fix-It Window question...

Quote:

Originally Posted by Question
Suppose that Redateam builds and ships off their competition robot, then builds a second robot to practice with. Redateam acknowledges that the second robot's parts won't be legal at competition, but they have the resources to be able to tolerate that. While practicing with the second robot, they realize their Super-Secret Widget of Graciously Professional Doom just isn't going to cut it, so they start thinking up ways to improve it. Do the parts Redateam uses to improve their Super-Secret Widget of Graciously Professional Doom on the practice robot (and never see the light of day at a FRC event) have to be fabricated during a Fix-It Window, or is it only the parts that will go on the competition robot?

Quote:

Originally Posted by Answer
The rules and constraints associated with the Fix-It-Window apply only to the competition robot, and all the materials and software that are installed on it. We cannot control activites associated with items that are not brought to the competition. When and where you choose to work on a backup robot that is not brought to the competition (or your car, or your homework, or your career, etc) is up to you.

And big ups to 386 on this one...

Quote:

Originally Posted by Question
The introduction in Team Update #14 says to "Change R20 to make the start and end of the fix-it window to be at 8:30 am local time Thursdays for all teams." The rewritten rule, however, still says that it "must be completed between the close of the competition and 8:30 am on the Thursday following Regional Competition weekend." Which one is correct? It would be much nicer for most teams to be able to work on the weekend rather than late on school/work nights.

Quote:

Originally Posted by Answer
Ooops! We corrected it in one place, but missed the other. We apologize for any confusion this caused. The update description is correct. The Fix-It-Window opens at 8:30 am on the Thursday of the competition, and runs through 8:30am on the following Thursday. We will correct the wording on Rule <R20> (again) to indicate this.


AmyPrib 07-03-2006 15:38

Re: Interesting Q/A's
 
Going in goal more than 3" regardless of who caused it... DQ! Drive carefully opponents!

Quote:

Question
Our robot is in the process of dumping balls into the corner goal and no part of the robot is extended into the goal. We are then pushed by an opponent's robot such that our dumping mechanism is now more than 3" into the goal. Who would receive the penalty for extending into the goal more than 3"?

Answer
Any robot that extends more than three inches into the goal (three inches past the plexiglas barrier) will be disqualified. If your robot has been designed such that it can extend into the goal, even if pushed, then you would be wise to operate the robot cautiously when in the vicinity of the goal.

Don't ram someone at high speed or excessively in automode!

Quote:

Question
<G22> Intentional ROBOT - ROBOT Interaction - Strategies aimed solely at the destruction, damage, tipping over, or entanglement of ROBOTs are not in the spirit of the FIRST Robotics Competition and are not allowed.

If a robots only purpose, in autonomous mode, is to run across the field and push/ram a robot that is trying to shoot will they be penalized for damage to the other robot?
Will it depend on the speed of the ramming robot? Slow speed and pushing as opposed to high speed and ramming?

Answer
Robot strategies intended to disrupt the aim of an opposing robot are acceptable and to be expected as long as they are not excessive. Excessive robot-to-robot interactions, as defined in Rule <G22> are not acceptable. This rule apples to both autonomous and teleoperated phases of the game.

GaryVoshol 08-03-2006 12:33

Re: Interesting Q/A's
 
It'll probably be deleted, but I caught this spam:

[quote] Hello from Publidirecta (Spain)

--------------------------------------------------------------------------------

Good afternoon, we are a Spanish company called Publidirecta, dedicated to different services.

devicenull 10-03-2006 21:07

Re: Interesting Q/A's
 
Quote:

Originally Posted by GaryV1188
It'll probably be deleted, but I caught this spam:

Mind removing the link? If not it's as bad as they are (improves their search engine results when sites link to them)

Andy Brockway 21-03-2006 08:19

Re: Interesting Q/A's
 
Quote:

on 3/17/06
Alliance Captain during eliminations

--------------------------------------------------------------------------------

Must the alliance captain be a DRIVER or HUMAN PLAYER?

If not, where should the alliance captain who is not a DRIVER or HUMAN PLAYER be during a match? What about after a match?

ANSWER

Re: Alliance Captain during eliminations

--------------------------------------------------------------------------------

See Section 8.4.1. The Alliance Captian must be a student member of the team. The Alliance Captain must be one of the designated team member positions (DRIVER, HUMAN PLAYER, or COACH if the COACH is a student). The Alliance Captain is not an additional team member beyond the four designated team members already on the field during the match.
This is not specified in the rules. I looked it up right after UTC because I saw Alliance Captains not on the drive team. Some teams will have to make some changes.

Mike Betts 21-03-2006 08:58

Re: Interesting Q/A's
 
Quote:

Originally Posted by Andy Brockway
This is not specified in the rules. I looked it up right after UTC because I saw Alliance Captains not on the drive team. Some teams will have to make some changes.

Andy,

If by "not specified in the rules" you mean "these words do not exist in the rules", then I agree.

I'm not sure what FIRST is doing here... It looks like they are referencing a different rule book than we have.

We have always selected our alliance captain from outside of the drive team.

We will make changes if and when the rules change.

Mike

dlavery 21-03-2006 10:14

Re: Interesting Q/A's
 
Quote:

Originally Posted by Mike Betts
I'm not sure what FIRST is doing here... It looks like they are referencing a different rule book than we have.

No, they aren't. Make sure you aren't mentally inserting rules that do not exist when you read the answer.

No where in the rules does it say that the DRIVER, HUMAN PLAYER or COACH positions have to be filled by the same person throughout the entire competition. Teams can swap out these positions throughout the competition. All teams have to do is pass the DRIVER, HUMAN PLAYER or COACH button to whatever person on the team that you want as your representative, and away you go. For the 30 minutes it takes to complete the alliance selections, any student on the team can be assigned as COACH (or whatever), and then they pass the position and the button off to someone else. That way, the team can have whoever they want as the representative during alliance selections (as long as it is a student), then have whoever they want as the members of the drive team during the matches.

They way this answer was worded, and particularly when examined in the context of the wording of the original question, seems to indicate that FIRST was adressing a different issue. The wording of the original question can be interpreted as an attempt to make the Alliance Captain a fifth position on the drive team (in addition to the COACH, DRIVERS and HUMAN PLAYER). This answer makes it clear that you can't do that, and that the team is limited to no more than four members of the drive team out on the field (which keeps things consistent with Rule <G31>). I think that they have properly addressed that issue, without restricting which particular individual from the team may be temporarily assigned as the team representative during the alliance selections.

-dave

Andy Brockway 21-03-2006 13:25

Re: Interesting Q/A's
 
Quote:

Originally Posted by dlavery
No, they aren't. Make sure you aren't mentally inserting rules that do not exist when you read the answer.

No where in the rules does it say that the DRIVER, HUMAN PLAYER or COACH positions have to be filled by the same person throughout the entire competition..........

-dave

When I saw the alliance captain, the person with the bib, standing in the queing area during their match at UTC , I decided to read the rules again. This what happens when you have been in FIRST for a while, rules change. I can remember when the bib was not allowed to be removed once placed on the alliance captain and had to be with the drive team during matches.

Does the above ruling require the bib to be worn during the match by a member of the drive team? If so, it should be enforced.

In either case, I have my driver be the Captain/Representative. He/she knows what's expected for alliance picking.

Joe Ross 14-04-2006 12:05

Re: Interesting Q/A's
 
http://forums.usfirst.org/showthread.php?t=847

<R59> doesn't seem to be the right rule for disallowing bluetooth on the OI, as it deals with custom circuits on the robot.

Tristan Lall 14-04-2006 17:01

Re: Interesting Q/A's
 
Quote:

Originally Posted by Joe Ross
http://forums.usfirst.org/showthread.php?t=847

<R59> doesn't seem to be the right rule for disallowing bluetooth on the OI, as it deals with custom circuits on the robot.

Section 7.13.1 bans two-way radios, but that's about all that I can see in the rules concerning off-board devices. Like Joe said, it's pretty clear from the rest of the rules that the controls (and things that interface with them) are not covered as custom circuits (see <R57>).

I don't think Bluetooth would be a problem, technically speaking, because it operates at 2.4 GHz (not 900 MHz like the radios) and uses pseudorandom frequency-hopping at 1.6 KHz between 79 channels (as a security measure).

As a practical matter, Bluetooth could be one more manifestation of the unwritten rule that communication from outside the alliance station is not allowed. (The team in question isn't asking to do this, but I'd speculate that FIRST wants to avoid this situation.)

Tristan Lall 24-04-2006 19:51

Re: Interesting Q/A's
 
Tubing rules
Quote:

Originally Posted by FRC1139
Is it legal to use a short length of appropriately rated 3/8" OD pneumatics tubing for flow reasons. Our intent is NOT to increase our air storage capacity but to increase flow rate.

Quote:

Originally Posted by GDC
No. Any additional tubing used on the robot must be identical to the tubing supplied in the kit. The kit tubing has been carefully sized to limit the flow rates throughout the entire pneumatic systems to a safe level.

This response is not quite correct. <R100> allows 2005's tubing (i.e. SMC TIUB07, not Freelin-Wade), cylinders and solenoid valves, subject to the usual limits. Furthermore, <R26> extends this to any "previous year's cylinder, valve, or tubing", despite the apparent discrepancy with <R100>. However, 3/8" tubing, since it has never been in the kit, is clearly illegal.

Previous years' tubing, even of the same size as this year's tubing isn't "identical" to the 2006 tubing. (We don't apply "same ratings" ≈ "identical" to other pneumatic components, so I think that there's a precedent that supports my criticism.)


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