Category A Crossing?

[GeeTwo]

Originally Posted by Kevin Sevcik

One of my partners in crime pointed out that pushing down two CdF ramps and driving over those may be better, so you don't have to worry about the skid-plate issue.

Not on the way up, but perhaps on the way down. Not as bad as driving into the ramp, but it could still hit things on the undercarriage.

Originally Posted by Kartoffee

Our team just decided that "French" was the better name for the Cheval de Frise. As in, "our robot can handle French pretty easily".

I've referred to it somewhere in writing as the CDF or CdF. I guess it's because I grew up in the Greater New Orleans area that saying Cheval de Frise isn't that difficult. Other than that, between D&D and a year in the SCA, I think that Batter is the the only term I didn't get straight away, and I'm guessing it's a cognate of Batture, which is a relatively high area between a river and it's natural levee, so that didn't take too much work.

Originally Posted by InspectorGadget1073

I suggest using a mechanism that can:
1. Lift the Portcullis
2. Press down one ramp on the Chival de Frise
3. Pull down the Drawbridge
4. Open the Sally Port
5. Scales
This can all be achieved with a mechanical arm that moves up and down from a pivot point on the robots frame, and has two hooks on the end, so that you have a hook facing each way. I would also extend for the portcullis and scale, and with some mechanical genius, it will do all of this. I hope this helped with your robot.

We're working on a mechanism that picks up, holds, and launches boulders, as well as the Portcullis and CdF (it uses the boulder as part of the manipulator). A second mechanism would handle #3 and #4. Scaling has moved to our back burner; it's 10 points per match, but it does not affect QP unless the 10 point differential changes the outcome of a match. Defeating at least four classes of defenses and getting those first 8 boulders are our #1 priority. Beyond that, boulders are an "infinite" source of points, while scaling is never more than 10 per match.

Originally Posted by The Doctor

My thought for category A was to breach another defense, then come at these the other way and push them open, then you just need to drive back through while your bot is still holding them open. I don't see why this wouldn't work.

Originally Posted by EricH

I do. Take a look at the definition of Crossing, and you'll notice that the first element is that you NOT be in contact with the Defense.

I fully concur with EricH, and was planning to post on this point this evening but this largely covers it. The point is that you have to enter the outer defenses NOT in contact with the defense. The teamwork plan may work with the sally port, but not the drawbridge unless you have an unusual angle of attack, probably including swerve or holonomic wheels. Not only have we decided not to do a fancy drive train this year, it's entirely possible that we'll go completely period on wheels and manufacture ours largely from wood planks. I love this game.

[jijiglobe]

Originally Posted by Kartoffee

Our team just decided that "French" was the better name for the Cheval de Frise. As in, "our robot can handle French pretty easily".

Alternatively, "Our robot can French pretty well"
XD

[droswell]

Originally Posted by Kevin Sevcik

Also, you're thinking of the drawbridge and sally port which are category C.

I believe it would be legal for you to hold the door for your teammates. Is this your interpretation as well?

[Bkeeneykid]

Originally Posted by droswell

I believe it would be legal for you to hold the door for your teammates. Is this your interpretation as well?

As long as the robot doing the crossing does not touch the defense outside of the Outer Works, that should be legal.

[TimTheGreat]

Originally Posted by jee7s

Robot B then goes bumper-to-bumper with Robot A and they both drive through to the courtyard. Robot B has crossed the defense and weakened it. Sure, you would have to do it twice, but you don't need a manipulator to cross the sally port and drawbridge. It just might take two robots.

Why would you have to do it twice? The defense is fully weakened once both robots go through

[EricH]

Originally Posted by TimTheGreat

Why would you have to do it twice? The defense is fully weakened once both robots go through

Nope. Where did Robot A start? In the Courtyard. Where do you have to be to start a Crossing? In the Neutral Zone, NOT in contact with a Defense. How do you Damage a Defense? Two Crossings.

This particular Crossing method will only net you one Crossing, thus one "hit" to the Defense.

[cbale2000]

Originally Posted by EricH

Nope. Where did Robot A start? In the Courtyard. Where do you have to be to start a Crossing? In the Neutral Zone, NOT in contact with a Defense. How do you Damage a Defense? Two Crossings.

This particular Crossing method will only net you one Crossing, thus one "hit" to the Defense.

Conversely, if you had all 3 alliance members cross at once you could eliminate that defense altogether in one go.


Personally I buy the argument that a mechanism could be created for both Category A defenses, I do not see, however, given the available expansion space and geometry of the Category A and C defenses how you could also open the Category C defenses without a second mechanism or some secondary actuation on the first mechanism.

IMO, since Category A is the only set of defenses that cannot be defeated by robot that can only drive, so prioritize mechanisms for those defenses first and if you have the extra weight after you're done, add something for Category C, otherwise just work with your alliance partners.

[cglrcng]

Originally Posted by Kartoffee

Our team just decided that "French" was the better name for the Cheval de Frise. As in, "our robot can handle French pretty easily".

"Shovel de Fries" and say that weeeth a french accent just like a Pepe de Pewww.

Total apologies to our French FRC friends, just attempting some word association games....My last name? Lucier Yes, it is French.

[cglrcng]

Originally Posted by TimTheGreat

Why would you have to do it twice? The defense is fully weakened once both robots go through

On a return trip I open Sally Port door, here move on in partner where you'll be safe, hold on I'll be right back...Do wait for me please (I return over another easy Defense, grab a boulder as I'm not going over empty handed), join you holding the door I opened for you from the neutral side, we proceed. Sally Port Damaged. Draw Bridge is next if it's there. While you wait for me you are safe...If not we'll pick up those penalty points later from them at match end.

[engunneer]

Originally Posted by cglrcng

On a return trip I open Sally Port door, here move on in partner where you'll be safe, hold on I'll be right back...Do wait for me please (I return over another easy Defense, grab a boulder as I'm not going over empty handed), join you holding the door I opened for you from the neutral side, we proceed. Sally Port Damaged. Draw Bridge is next if it's there. While you wait for me you are safe...If not we'll pick up those penalty points later from them at match end.

There will be a drawbridge /or/ a Sally port. Never both.

[ToddF]

In our game analysis we developed a match gameplan for three types of matches:
- Quals at district event (our robot and 2 minimally functional partners)
- Elims case 1 (us and 2 pretty good partners)
- Elims case 2 (us, 1 other excellent partner and one minimally functional partner)

In all three of these gameplans, the first two actions are:
1) autonomous drive across an easy defense (score goal if technically possible)
2) open door/drawbridge for partners to drive through

This ensures that seconds into teleop we will have a minimum of 20 points on the board and 3 of the 8 required defense crossings completed, even if our partners are only boxes on wheels that can just drive.

[Taylor]

Category A
Pork Cutlet (portcullis)
Cheese Fries (cheval de frise)

Category B
Root Beer Moat (moat)
Jam Tarts (ramparts)

Category C
Salad Fork (sally port)
Raw Cabbage (drawbridge)

Category D
Gumball (rock wall)
Hunger Pang (rough terrain)

Permanent Defense
Steak Tartare (low bar)

[Kevin Sevcik]

Originally Posted by GeeTwo

Permanent Defense
Steak Tartare

Surely this defense is Chicken Paillard. Or is that not an option cause it's still French? Or maybe Tostones. The Panini Press? Oh! George Foreman. That surely has to be the correct name.