Go to Post Last I checked, this was a competition... just checked again, yup still has Competition in the name. - Andrew Schreiber [more]
Home
Go Back   Chief Delphi > Technical > Technical Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Closed Thread
Thread Tools Rate Thread Display Modes
  #31   Spotlight this post!  
Unread 16-07-2008, 13:24
Dick Linn's Avatar
Dick Linn Dick Linn is offline
Registered User
no team (Synergy)
 
Join Date: Jan 2003
Rookie Year: 2001
Location: Midlothian, VA
Posts: 679
Dick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond repute
Send a message via AIM to Dick Linn
Re: What would you buy if you could?

I would like to have a compact variable speed mechanical transmission something like this one, though it probably works in one direction only:

http://books.google.com/books?id=wSQ..._brr=1#PPA3,M1

http://www.google.com/patents?id=_Ml...ad=0_1#PPP4,M1

Maybe old Ludwig Dieterich was on to something. He did have a number of patents...
__________________
Richard Linn

Proud father of Marine LCpl. Karl R. Linn
Co-founder Team 975
KIA, Iraq 1/26/2005
  #32   Spotlight this post!  
Unread 16-07-2008, 18:31
Madison's Avatar
Madison Madison is offline
Dancing through life...
FRC #0488 (Xbot)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1999
Location: Seattle, WA
Posts: 5,244
Madison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond reputeMadison has a reputation beyond repute
Re: What would you buy if you could?

Quote:
Originally Posted by Doctorwho View Post
I would love to have a Contex Z450 3D printer. just think, all you would need to build custom gearboxes, mounts, custom fasteners, and any other small part you could ever want; http://www.youtube.com/watch?v=yyZtBYG0QOg
Those printers use a type of glue-impregnated ABS, if I'm not mistaken. The parts they make are fine for some applications, but they're really meant for prototypes. I wouldn't trust anything critical to that machine.
__________________
--Madison--

...down at the Ozdust!

Like a grand and miraculous spaceship, our planet has sailed through the universe of time. And for a brief moment, we have been among its many passengers.
  #33   Spotlight this post!  
Unread 20-07-2008, 02:31
=Martin=Taylor= =Martin=Taylor= is offline
run the trap!!!
FRC #0100 (The Wild Hat Society)
Team Role: Human Player
 
Join Date: Feb 2006
Rookie Year: 2005
Location: Bezerkeley, California
Posts: 1,255
=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute=Martin=Taylor= has a reputation beyond repute
Re: What would you buy if you could?

Quote:
Originally Posted by Billfred View Post
-A mechanical brake. Not for any definite purpose, mind you; I just know I'm not the only person who has yearned for the ability to make something that spins stop spinning.
Found another one. (link) (disk brakes on the same page)

Nice compact little module.

Quote:
Originally Posted by Billfred View Post
A better interface for the window motors.
Ahh yes... And I found this sprocket (1/2 down the page) don't know the exact dimensions but I bet you it will fit the window
__________________
"Cooperation; because life is a team sport"
-Philip J. Fry

Last edited by =Martin=Taylor= : 20-07-2008 at 02:37.
  #34   Spotlight this post!  
Unread 20-07-2008, 13:46
Dick Linn's Avatar
Dick Linn Dick Linn is offline
Registered User
no team (Synergy)
 
Join Date: Jan 2003
Rookie Year: 2001
Location: Midlothian, VA
Posts: 679
Dick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond repute
Send a message via AIM to Dick Linn
Re: What would you buy if you could?

Quote:
Originally Posted by M. Krass View Post
Those printers use a type of glue-impregnated ABS, if I'm not mistaken. The parts they make are fine for some applications, but they're really meant for prototypes. I wouldn't trust anything critical to that machine.
This one apparently uses heated ABS (see "How does the process work?": http://www.dimensionprinting.com/3d-...nting-faq.aspx
__________________
Richard Linn

Proud father of Marine LCpl. Karl R. Linn
Co-founder Team 975
KIA, Iraq 1/26/2005
  #35   Spotlight this post!  
Unread 20-07-2008, 16:20
R.C.'s Avatar
R.C. R.C. is online now
2017... Oooh Kill em, Swerve!
AKA: Owner, WestCoast Products
FRC #1323 (MadTown Robotics)
Team Role: Engineer
 
Join Date: Feb 2008
Rookie Year: 2006
Location: Madera, CA
Posts: 2,190
R.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond repute
Re: What would you buy if you could?

Would you buy a 4 speed gearbox, spur gear style? Also its lighter than the supershifter. Thatz what i would want.
__________________
R.C.
Owner, WestCoast Products || Twitter
MadTown Robotics Team 1323
  #36   Spotlight this post!  
Unread 20-07-2008, 16:44
artdutra04's Avatar
artdutra04 artdutra04 is offline
VEX Robotics Engineer
AKA: Arthur Dutra IV; NERD #18
FRC #0148 (Robowranglers)
Team Role: Engineer
 
Join Date: Mar 2005
Rookie Year: 2002
Location: Greenville, TX
Posts: 3,078
artdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond repute
Re: What would you buy if you could?

Quote:
Originally Posted by rc_cola1323 View Post
Would you buy a 4 speed gearbox, spur gear style? Also its lighter than the supershifter. Thatz what i would want.
Would you ever really need four speeds?

There comes a point where you cannot go any slower than a certain speed because you are traction-limited by the coefficient of friction of your wheels, and nor would you be able to go above a certain speed because the distance needed to accelerate to that speed would be impossible on a FRC field.
__________________
Art Dutra IV
Robotics Engineer, VEX Robotics, Inc., a subsidiary of Innovation First International (IFI)
Robowranglers Team 148 | GUS Robotics Team 228 (Alumni) | Rho Beta Epsilon (Alumni) | @arthurdutra

世上无难事,只怕有心人.
  #37   Spotlight this post!  
Unread 20-07-2008, 17:21
R.C.'s Avatar
R.C. R.C. is online now
2017... Oooh Kill em, Swerve!
AKA: Owner, WestCoast Products
FRC #1323 (MadTown Robotics)
Team Role: Engineer
 
Join Date: Feb 2008
Rookie Year: 2006
Location: Madera, CA
Posts: 2,190
R.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond repute
Re: What would you buy if you could?

Quote:
Originally Posted by artdutra04 View Post
Would you ever really need four speeds?
Maybe, maybe not. But you could utilize 2 or 3 of the speeds at the least and its still lighter than the supershifter. Also think about offseason events and all the things you could do with different speeds (pull a track, have a robot race with all you robots, show off to the community).

Think about it for a sec:

08:

-Needed an extreme high gear for the straightaways
-A Middle gear for turning and good handling
-A low gear to play defense on hurdling robots and for those times of traffic jams.

07:

-Needed an extreme high gear to go from one side of the field to the other
-A middle gear for turning and a good handling of the bot
-A low gear for what a lot of teams did, play defense.

06:

-A high gear to go from side to side
-A second gear for turning and handling
-A third gear for staying on the ramp
-A low gear for climbing the ramp

In my opinion there is a need for it, thats why people use dewalts. But with dewalts there are so many mods and only a single cim so far. The shifting is terrible. Also what if your programmer can make a line of code that would allow easy on the fly shifting. Your in normal gear and when you press the right trigger, bam, high gear. Your in normal gear and when you press the left trigger, bam, a low gear with pushing power.
__________________
R.C.
Owner, WestCoast Products || Twitter
MadTown Robotics Team 1323
  #38   Spotlight this post!  
Unread 20-07-2008, 17:25
vivek16's Avatar
vivek16 vivek16 is offline
Whoa! college pilot.
AKA: vivek
FRC #2264 (trojan robotics)
Team Role: Alumni
 
Join Date: Jan 2007
Rookie Year: 2007
Location: plymouth, minnesota
Posts: 1,227
vivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond repute
Send a message via AIM to vivek16 Send a message via MSN to vivek16
Re: What would you buy if you could?

I'm going to agree with arthur. 4 is a bit excessive. I would think 2 is the most you really need. 3 is nice (although it is easier to build a 4 speed gearbox than a 3 speed).

I want linear bearings for regular 1x1 tubing. That would be nice.

-Vivek
__________________
"we don't build robots, we build people"
  #39   Spotlight this post!  
Unread 20-07-2008, 18:09
R.C.'s Avatar
R.C. R.C. is online now
2017... Oooh Kill em, Swerve!
AKA: Owner, WestCoast Products
FRC #1323 (MadTown Robotics)
Team Role: Engineer
 
Join Date: Feb 2008
Rookie Year: 2006
Location: Madera, CA
Posts: 2,190
R.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond repute
Re: What would you buy if you could?

That is why i said four speed, an extra gear would just available and 4 speed is extremely easy to build.
__________________
R.C.
Owner, WestCoast Products || Twitter
MadTown Robotics Team 1323
  #40   Spotlight this post!  
Unread 20-07-2008, 21:41
AndyB's Avatar
AndyB AndyB is offline
Ambitiously Disappointing
AKA: Andy Burchardt
FRC #0171 (Cheese Curd Herd)
Team Role: College Student
 
Join Date: Mar 2005
Rookie Year: 2004
Location: Platteville, WI
Posts: 1,185
AndyB has a reputation beyond reputeAndyB has a reputation beyond reputeAndyB has a reputation beyond reputeAndyB has a reputation beyond reputeAndyB has a reputation beyond reputeAndyB has a reputation beyond reputeAndyB has a reputation beyond reputeAndyB has a reputation beyond reputeAndyB has a reputation beyond reputeAndyB has a reputation beyond reputeAndyB has a reputation beyond repute
Re: What would you buy if you could?

Quote:
Originally Posted by vivek16 View Post
I'm going to agree with arthur. 4 is a bit excessive. I would think 2 is the most you really need. 3 is nice (although it is easier to build a 4 speed gearbox than a 3 speed).

I want linear bearings for regular 1x1 tubing. That would be nice.

-Vivek
Something similar to this:
http://www.chiefdelphi.com/media/photos/31607
would be extremely useful, if that is what you were going for.
__________________
Team 171 :: Cheese Curd Herd :: College Mentor, 2008-Present
Team 269 :: CooneyTech Robotics :: Student, 2005-2007
  #41   Spotlight this post!  
Unread 20-07-2008, 21:49
artdutra04's Avatar
artdutra04 artdutra04 is offline
VEX Robotics Engineer
AKA: Arthur Dutra IV; NERD #18
FRC #0148 (Robowranglers)
Team Role: Engineer
 
Join Date: Mar 2005
Rookie Year: 2002
Location: Greenville, TX
Posts: 3,078
artdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond reputeartdutra04 has a reputation beyond repute
Re: What would you buy if you could?

Quote:
Originally Posted by rc_cola1323 View Post
Maybe, maybe not. But you could utilize 2 or 3 of the speeds at the least and its still lighter than the supershifter. Also think about offseason events and all the things you could do with different speeds (pull a track, have a robot race with all you robots, show off to the community).

Think about it for a sec:

08:

-Needed an extreme high gear for the straightaways
-A Middle gear for turning and good handling
-A low gear to play defense on hurdling robots and for those times of traffic jams.

07:

-Needed an extreme high gear to go from one side of the field to the other
-A middle gear for turning and a good handling of the bot
-A low gear for what a lot of teams did, play defense.

06:

-A high gear to go from side to side
-A second gear for turning and handling
-A third gear for staying on the ramp
-A low gear for climbing the ramp

In my opinion there is a need for it, thats why people use dewalts. But with dewalts there are so many mods and only a single cim so far. The shifting is terrible. Also what if your programmer can make a line of code that would allow easy on the fly shifting. Your in normal gear and when you press the right trigger, bam, high gear. Your in normal gear and when you press the left trigger, bam, a low gear with pushing power.
Just remember that shifting is never instantaneous.

Some of your circumstances where you list as needing three or more speeds can be accomplished with two (or even one) for less weight and less complexity. Or, things like greater control while turning can be accomplished through code algorithms that can "detect turning" and limit the maximum turn/spin rate of the robot instead of adding weight to add another speed to your transmission.

I'm not saying that designing and prototyping a four speed transmission is bad; on the contrary it would most likely be a great learning experience for the mechanically minded people. But the practical implications on the FRC competition field would make any benefits limited, as once you go above two or three speeds, it would probably be less complex to design and fabricate a CVT transmission than a fixed ratio one.

Robotics is not just about solving problems mechanically*; it's about finding the most efficient solution to the problem at hand.


* As much as I wish... Who needs a gyro when you can build a south pointing chariot?
__________________
Art Dutra IV
Robotics Engineer, VEX Robotics, Inc., a subsidiary of Innovation First International (IFI)
Robowranglers Team 148 | GUS Robotics Team 228 (Alumni) | Rho Beta Epsilon (Alumni) | @arthurdutra

世上无难事,只怕有心人.
  #42   Spotlight this post!  
Unread 20-07-2008, 22:07
R.C.'s Avatar
R.C. R.C. is online now
2017... Oooh Kill em, Swerve!
AKA: Owner, WestCoast Products
FRC #1323 (MadTown Robotics)
Team Role: Engineer
 
Join Date: Feb 2008
Rookie Year: 2006
Location: Madera, CA
Posts: 2,190
R.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond repute
Re: What would you buy if you could?

The main reason for the 4 speed tranny is that i've seen some teams use the most out of one. I forgot the team number, but i will post it after i find it. But thanks arthur for your input.
__________________
R.C.
Owner, WestCoast Products || Twitter
MadTown Robotics Team 1323
  #43   Spotlight this post!  
Unread 20-07-2008, 22:16
vivek16's Avatar
vivek16 vivek16 is offline
Whoa! college pilot.
AKA: vivek
FRC #2264 (trojan robotics)
Team Role: Alumni
 
Join Date: Jan 2007
Rookie Year: 2007
Location: plymouth, minnesota
Posts: 1,227
vivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond reputevivek16 has a reputation beyond repute
Send a message via AIM to vivek16 Send a message via MSN to vivek16
Re: What would you buy if you could?

Quote:
Originally Posted by AndyB View Post
Something similar to this:
http://www.chiefdelphi.com/media/photos/31607
would be extremely useful, if that is what you were going for.
Yes, something like that, if commercially available, would be great. Especially for teams with limited machining capabilities.

-Vivek
__________________
"we don't build robots, we build people"

Last edited by vivek16 : 20-07-2008 at 22:20.
  #44   Spotlight this post!  
Unread 20-07-2008, 22:22
R.C.'s Avatar
R.C. R.C. is online now
2017... Oooh Kill em, Swerve!
AKA: Owner, WestCoast Products
FRC #1323 (MadTown Robotics)
Team Role: Engineer
 
Join Date: Feb 2008
Rookie Year: 2006
Location: Madera, CA
Posts: 2,190
R.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond reputeR.C. has a reputation beyond repute
Re: What would you buy if you could?

My question to CD and to the FIRST Community is if a 4 speed tranny was avaliable and it weighed about the Super Shifter (probably less). The price would be a tad bit more, would you buy it?
__________________
R.C.
Owner, WestCoast Products || Twitter
MadTown Robotics Team 1323
  #45   Spotlight this post!  
Unread 20-07-2008, 22:26
Qbranch Qbranch is offline
wow college goes fast.
AKA: Alex
FRC #1024 (Kil-A-Bytes)
Team Role: Alumni
 
Join Date: Apr 2006
Rookie Year: 2006
Location: Indianapolis
Posts: 1,174
Qbranch has a reputation beyond reputeQbranch has a reputation beyond reputeQbranch has a reputation beyond reputeQbranch has a reputation beyond reputeQbranch has a reputation beyond reputeQbranch has a reputation beyond reputeQbranch has a reputation beyond reputeQbranch has a reputation beyond reputeQbranch has a reputation beyond reputeQbranch has a reputation beyond reputeQbranch has a reputation beyond repute
Re: What would you buy if you could?

Oh wow what a list... but here's a few of the tops:

>A Hurco VM2 for the team with a 4th axis or maybe even a VMX series with a two-axis trunnion table.

>A box full of Sick LIDAR units.

>Some high-frequency 16-bit chopper drives that use some kind of serial communications instead of PWM.

-q
__________________
Electrical Engineer Illini
1024 | Programmer '06, '07, '08 | Driver '08
Closed Thread


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
If You could bring back one game, for 1 season in 09 what would it be? jax1488 General Forum 76 14-01-2010 19:40
pic: What do you do when you don't have enough money to buy 6 IFI wheels? Arefin Bari Extra Discussion 1 14-02-2006 01:14
if you could have what you want... Greg Perkins Rumor Mill 33 06-09-2002 11:30
Would you buy a recording of an event? DanL General Forum 15 08-04-2002 21:04


All times are GMT -5. The time now is 17:07.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi