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Unread 10-14-2013, 10:34 AM
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Justin Montois Justin Montois is offline
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"The Little Things" - Helpful hints for all

The purpose of this thread is to compile a list of things your team does that may seem small, but really give you a distinct advantage either on or off the field. These can include things your team does, or things you've seen other teams do.

Think pre-season prep, build season, at events, travel plans, Chairman's Award, Sponsor relations...

For example...

- Hot Glue certain electrical connections

- Zip tie battery to main breaker connection

- Send sponsors thank you letters and include a team picture with the robot. A small gesture but it goes a long way.

- Have all team members have input on the Chairman's Award essay and study the final version. You never know who will end up talking to a judge at an event.

Remember that FIRST and CD get a ton of new rookies every year. Think hard about the little things your team may do and don't take anything for granted.
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2016- World Championship Finalists and Tesla Division Champions with 2056, 1690, and 1405
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Unread 10-14-2013, 10:57 AM
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Re: "The Little Things" - Helpful hints for all

- There is no situation in FRC where you can safely say "well, I guess we don't need a pick list".

- Don't fix mechanical problems with software, ever.

- Keep your robot and your strategy simple and you won't have to worry nearly as much about almost every problem that plagues FRC robots (weight, CG, reliability, system integration, etc)

- Great teams with great software have control loops. Clever teams without software have pneumatics.
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Unread 10-14-2013, 01:42 PM
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Re: "The Little Things" - Helpful hints for all

- Pre-match checklists and pre-flight tests are always necessary. It doesn't matter how well your robot ran in the last match, check everything again. This goes the same for post-match checks.

- Driver training can never be overvalued, and is very commonly undervalued.

- Never stop learning. There is something you can learn from every team, every student, every mentor, you talk to.

- "Custom" does not always mean "better".

- Every student should be knowledgable on every part of the robot. A software student should be able to explain any mechanical part on the robot as well as a mechanical student can explain any other part.

- Take time and design something right the first time. Tweaking should be done to improve, not to make something work.
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Unread 10-14-2013, 01:57 PM
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Re: "The Little Things" - Helpful hints for all

The most important part of the robot, regardless of the game, is the drivetrain.

MAKE SURE THE BATTERY DOES NOT FALL OUT

Design things to be much stronger than you think they need to be. When something goes wrong (your robot falls off 2 second level of the pyramid), and your robot doesn't break, it's very impressive to watch

Don't get too attached to an idea. Your first idea is never the best, and 99.99% of the time, there's somebody who can help you make it better. (as JVN says, design is all about iteration.)

At a competition, doing well is not an excuse for not testing the robot. This is why you don't tell your drivers the team's rank until its time for alliance selection.
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Unread 10-14-2013, 02:44 PM
JohnBoucher JohnBoucher is offline
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Re: "The Little Things" - Helpful hints for all

Battery management.

Both the robot and the driver station.

I would add to you checklists to check if the driver station is charged. If your battery is suspect, get a replacement. You don't need the driver station to die.

Have a robot battery management plan.
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Unread 10-14-2013, 02:57 PM
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Re: "The Little Things" - Helpful hints for all

- Test setup your pit before an event, keep it the same from event to event, it will really speed up repairs if you know where things are.

- Save all your team documents in one place (Dropbox, Google Drive, another cloud or server solution). It's far easier to find something you already have than it is to remake it.

- Standardize your hole sizes and fasteners. We use 3/16" rivets and 10-24 bolts in 13/64" holes, it may not be a perfect solution but it works very well for most FRC robots.

- Limit your building materials: we try to only use a few select standard building materials to actually stock that way we if we need to remake something at competition we have the spare material to build it from. Our list includes 1x1x1/16" square and angle aluminum, 1x1x1/8" angle aluminum, 1/16" polycarb, and .09 sheet aluminum. A few other things creep in but for the most part everything is made from those items.
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Unread 10-14-2013, 03:26 PM
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Peter Matteson Peter Matteson is offline
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Re: "The Little Things" - Helpful hints for all

Quote:
Originally Posted by Justin Montois View Post
- Hot Glue certain electrical connections
Don't trust everything you read on Chief Delphi.
There have been specific rules against the above comment in the robot rules several years.
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Unread 10-14-2013, 03:38 PM
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Re: "The Little Things" - Helpful hints for all

Don't use set screws to transfer torque or loads. I even try to avoid them in no load applications such as encoders. Outside of FIRST I only use them in very low load situations, low vibration settings.
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Unread 10-14-2013, 03:50 PM
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Re: "The Little Things" - Helpful hints for all

Quote:
Originally Posted by Peter Matteson View Post
There have been specific rules against [gluing electrical components] in the robot rules several years.
This is in reference to <R65> in the 2013 manual. Standard practice for many teams, including mine, is to apply hot glue to PWM connections. Was this disallowed at any events this year?
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Unread 10-14-2013, 04:20 PM
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Re: "The Little Things" - Helpful hints for all

As our teacher says
"when in doubt, roll pin it!"
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Unread 10-14-2013, 05:22 PM
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Re: "The Little Things" - Helpful hints for all

Quote:
Originally Posted by Mark Sheridan View Post
Don't use set screws to transfer torque or loads. I even try to avoid them in no load applications such as encoders. Outside of FIRST I only use them in very low load situations, low vibration settings.
Quote:
Originally Posted by BBray_T1296 View Post
As our teacher says
"when in doubt, roll pin it!"
To go along with these, mechanical connections beat adhesives and friction every single time.
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Unread 10-14-2013, 05:27 PM
Andrew Schreiber Andrew Schreiber is offline
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Re: "The Little Things" - Helpful hints for all

Quote:
Originally Posted by Chris is me View Post

- Great teams with great software have control loops. Clever teams without software have pneumatics.
Great teams with great software have control loops but prefer pneumatics.
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Unread 10-14-2013, 06:48 PM
ErvinI ErvinI is offline
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Re: "The Little Things" - Helpful hints for all

Quote:
Originally Posted by Andrew Schreiber View Post
Great teams with great software have control loops but prefer pneumatics. Unless they're 67.
Fixed.

As for my own contributions:
  • Don't implement software changes just before a match, especially if that software has a chance to be stuck in an infinite loop.
  • Always check your batteries before a match if possible. CTRE sells a great battery checker if you're willing to shell out $125.
  • Rule #34 of Chief Delphi: if a question regarding FIRST robotics exists, there is a thread about it on Chief Delphi.
  • Keep track of all students going to a regional, especially when it is out of the country. Use some kind of head-count or buddy-system. If it is out-of-country, make sure that all students have their passports with them.
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Unread 10-14-2013, 06:55 PM
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Re: "The Little Things" - Helpful hints for all

Bumpers are a lot easier to deal with if they aren't an afterthought.

The rule you don't read will be the one that gets you--so at least look at all of them.

"But it passed at X" is not a reason for the inspector to pass an illegal robot--particularly if X is not an official event.

Failing to plan is planning to fail. Have a plan for travel and any time not in the venue, even if it's "Free time, be back at point X by time Y".
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Unread 10-14-2013, 07:19 PM
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Re: "The Little Things" - Helpful hints for all

Abiding by the rules is a necessity. None of them are optional; they are all strict design constraints that MUST be met in order to compete. Although a good shooter may be more of a differentiating factor between good and bad robots than good bumpers, existing and legal bumpers are more of a necessity to be on the field than an existing shooter is.

As for technical stuff: avoid shoulders, grooves or other features on live shafts that concentrate stress between the driving torque and the load. Putting a snap ring groove between a driving sprocket and arm hub is asking for the shaft to fail where a spacer would do perfectly fine.
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