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-   -   [FTC]: 2014-2015 Game Manual Part 1 Now Online (http://www.chiefdelphi.com/forums/showthread.php?t=130059)

Neutrinos6433 23-07-2014 10:25
Re: [FTC]: 2014-2015 Game Manual Part 1 Now Online
 
Quote:
Originally Posted by atucker4072 (Post 1393814)
Say the game calls for speed like Block Party did. That's great you realize it and you build a fast robot that can zip around the field. Okay someone plays defense on you. Would you rather have to try and make a move around them and possibly have to around to the other side of the field or would you rather shift and be able to just push them out of your way?
Are we sure a shifting gear box is legal? I would think it is a COTS with more than one degree of freedom. Only COTS with one degree of freedom are allowed. In a shifting gearbox, one degree of freedom is rotational and the other degree of freedom is translation (for shifting).

In fact a non shifting gearbox could be considered having more than one degree of freedom as each gear has its own axis and different rotational direction. All this will have to be clarified in the official forums, but your comments at this time will be appreciated.

atucker4072 23-07-2014 11:55
Re: [FTC]: 2014-2015 Game Manual Part 1 Now Online
 
Andy Mark is updating the information on the link to the motor to say that all the gears are metal! No more plastic gears!

atucker4072 23-07-2014 12:01
Re: [FTC]: 2014-2015 Game Manual Part 1 Now Online
 
Quote:
Originally Posted by Neutrinos6433 (Post 1394073)
Are we sure a shifting gear box is legal? I would think it is a COTS with more than one degree of freedom. Only COTS with one degree of freedom are allowed. In a shifting gearbox, one degree of freedom is rotational and the other degree of freedom is translation
When I talked with the person that had been working with it, it was specifically designed for FTC. The goal of it was to make smaller of the shifter that 4251 had built this year. That's all I know.

jcarr 24-07-2014 00:22
Re: [FTC]: 2014-2015 Game Manual Part 1 Now Online
 
I think that the shifter has two degrees of freedom and don't think that it would be legal under the rules as written unless the forum specifically allows it. However, the ability to use COTS gear housings may make it easier to build your own.

atucker4072 24-07-2014 00:35
Re: [FTC]: 2014-2015 Game Manual Part 1 Now Online
 
Quote:
Originally Posted by jcarr (Post 1394176)
I think that the shifter has two degrees of freedom and don't think that it would be legal under the rules as written unless the forum specifically allows it. However, the ability to use COTS gear housings may make it easier to build your own.
They did have a single speed gear box actually. It was about as half as thick as the shifter. Other than that it was the same size. Basically a smaller FRC single speed gear box.

aklego 24-07-2014 15:05
Re: [FTC]: 2014-2015 Game Manual Part 1 Now Online
 
Quote:
Originally Posted by atucker4072 (Post 1394086)
Andy Mark is updating the information on the link to the motor to say that all the gears are metal! No more plastic gears!
This is an outstanding development. Does anybody from the FRC world know if AM usually supplies repair parts for their motors?

safiq10 24-07-2014 18:01
Re: [FTC]: 2014-2015 Game Manual Part 1 Now Online
 
Quote:
Originally Posted by aklego (Post 1394223)
This is an outstanding development. Does anybody from the FRC world know if AM usually supplies repair parts for their motors?
Generally in FRC the motors don't have replacement parts but the gearboxes do, I asked andymark and they said there are currently no plans on the motor having replacement parts.

JohnFogarty 31-07-2014 10:57
Re: [FTC]: 2014-2015 Game Manual Part 1 Now Online
 
Quote:
Originally Posted by safiq10 (Post 1394254)
Generally in FRC the motors don't have replacement parts but the gearboxes do, I asked andymark and they said there are currently no plans on the motor having replacement parts.
I've never in my days ever thought I would want to replace parts of a motor. Now a motor-gearbox combo like the Tetrix motors are, that's a different story.

ftcTeam6389 15-08-2014 23:30
Re: [FTC]: 2014-2015 Game Manual Part 1 Now Online
 
Quote:
Originally Posted by aklego (Post 1393529)
Details about the new Andy Mark motor are here:

http://www.andymark.com/product-p/AM-2964.htm

I'm excited about the built-in encoder but a bit apprehensive about the plastic gear.
what plastic gear? the specs say "Gear Material: Steel"

confused.

orangemoore 16-08-2014 00:29
Re: [FTC]: 2014-2015 Game Manual Part 1 Now Online
 
Quote:
Originally Posted by ftcTeam6389 (Post 1396618)
what plastic gear? the specs say "Gear Material: Steel"

confused.
When the product was first released it had a single plastic gear and then they changed them all to steel.

Smart Move Andymark!

Snakebyte 4546 30-08-2014 12:15
Re: [FTC]: 2014-2015 Game Manual Part 1 Now Online
 
So I was wondering what ya'll thought about the rules regarding the SuperPro board and accessories. The rules aren't incredibly specific regarding this but it seems like it IS legal to have two 9V batteries, one for the SuperPro and one for visible LEDs (if they aren't robot controlled). But, if they are being controlled by an Arduino Micro (Which seems to also be legal, <R11>.D.ii) Can they technically be considered "Non ROBOT controlled, thus allowing for an independent 9V battery? This is what we interpreted. Any thoughts?

-Snakebyte 4546

Robo Hamsters 31-08-2014 22:37
Re: [FTC]: 2014-2015 Game Manual Part 1 Now Online
 
Quote:
Originally Posted by Neutrinos6433 (Post 1394073)
Are we sure a shifting gear box is legal? I would think it is a COTS with more than one degree of freedom. Only COTS with one degree of freedom are allowed. In a shifting gearbox, one degree of freedom is rotational and the other degree of freedom is translation (for shifting).
I think it would be legal per R04c

Quote:
COTS parts and assemblies may only have a maximum of a single degree of freedom. It is the intent of FIRST that teams design and build their devices to achieve the game challenge. Assemblies of COTS components, such as linear slides, and gearboxes are allowed while a pre-fabricated gripper assembly designed to grab the game elements is not. Holonomic wheels (omni or mechanum) are exempt from the one degree of freedom limitation.

Examples of single degree of freedom COTS components are:
  • Hinges
  • Sprockets
  • Gears of any type, including Rack and Pinion gears
  • Simple and compound gear trains
  • Planetary gear trains
  • Lazy Susan
Just my thought, but as always it should be asked in the FTC Q&A.

JesseK 01-09-2014 15:24
Re: [FTC]: 2014-2015 Game Manual Part 1 Now Online
 
Quote:
Originally Posted by Robo Hamsters (Post 1398589)
I think it would be legal per R04c



Just my thought, but as always it should be asked in the FTC Q&A.
Compound in the context of gearboxes could also mean a single speed, multi-reduction gearbox, such as an am toughbox. It is with Q&A before a purchase is made, IMO.

Robo Hamsters 01-09-2014 20:40
Re: [FTC]: 2014-2015 Game Manual Part 1 Now Online
 
Quote:
Originally Posted by JesseK (Post 1398642)
Compound in the context of gearboxes could also mean a single speed, multi-reduction gearbox, such as an am toughbox. It is with Q&A before a purchase is made, IMO.
Very true. Definitely a Q&A issue.

skatefriday 02-09-2014 14:14
Re: [FTC]: 2014-2015 Game Manual Part 1 Now Online
 
Quote:
Originally Posted by Snakebyte 4546 (Post 1398485)
So I was wondering what ya'll thought about the rules regarding the SuperPro board and accessories. The rules aren't incredibly specific regarding this but it seems like it IS legal to have two 9V batteries, one for the SuperPro and one for visible LEDs (if they aren't robot controlled). But, if they are being controlled by an Arduino Micro (Which seems to also be legal, <R11>.D.ii) Can they technically be considered "Non ROBOT controlled, thus allowing for an independent 9V battery? This is what we interpreted. Any thoughts?

-Snakebyte 4546
We powered an led light strip via the main robot battery pack, running
it through a 7805 voltage regulator (with a huge heat sink) last year.

We had a schematic of the voltage regulation circuit and a fully educated
team member for judging should a judge question the setup.

Note that all microcontrollers, which includes an arduino, must be
powered from the superpro protoboard, and it can only supply
something along the lines of 8mA. A stock arduino will draw 20mA,
so we ran a barebones ATmega328 to drive the led strip.

Writeup here:

http://degreesplato.wordpress.com/20...s-need-lights/


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