OCCRA
Go to Post I even liked the Bieber commercial. - Andy Baker [more]
Home
Go Back   Chief Delphi > Technical > Motors
CD-Events   CD-Media   CD-Spy   FRC-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Closed Thread
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 03-29-2002, 07:01 PM
Keith Chester's Avatar
Keith Chester Keith Chester is offline
HGFSP
FRC #0025 (Team 25)
Team Role: Alumni
 
Join Date: Mar 2002
Rookie Year: 2002
Location: North Brunswick, NJ
Posts: 382
Keith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to behold
Send a message via AIM to Keith Chester
Help picking motors

My dad has recently become as fascinated with FIRST as I, and we have decided as a father/son project to begin the building of a robot of our own, much smaller of course.
One of the questions I have no answer to yet is- what kind of motor shall I use, and where can I get these motors? Keep in mind, I don't have a budget the size of the FIRST teams.
__________________
A proud graduate of 25.
Students. Teammates. Brothers.
Proud member of R.I.N.O.S., Rookies In Need Of Support.
  #2   Spotlight this post!  
Unread 03-30-2002, 03:49 PM
Keith Chester's Avatar
Keith Chester Keith Chester is offline
HGFSP
FRC #0025 (Team 25)
Team Role: Alumni
 
Join Date: Mar 2002
Rookie Year: 2002
Location: North Brunswick, NJ
Posts: 382
Keith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to behold
Send a message via AIM to Keith Chester
Well since it seems no one can help me, how bout this- where oh where can I buy the motors on the first list? It's next to impossible to find them on the site, or I have to get the entire stupid set of some other assecory i dont want
__________________
A proud graduate of 25.
Students. Teammates. Brothers.
Proud member of R.I.N.O.S., Rookies In Need Of Support.
  #3   Spotlight this post!  
Unread 03-30-2002, 05:28 PM
Unsung FIRST Hero
Nate Smith Nate Smith is offline
FRC Key Volunteer Trainer
AKA: CrazyNate
no team
 
Join Date: Jun 2001
Rookie Year: 1998
Location: Old Town, Maine
Posts: 1,029
Nate Smith is a splendid one to beholdNate Smith is a splendid one to beholdNate Smith is a splendid one to beholdNate Smith is a splendid one to beholdNate Smith is a splendid one to beholdNate Smith is a splendid one to beholdNate Smith is a splendid one to beholdNate Smith is a splendid one to behold
Send a message via AIM to Nate Smith Send a message via Yahoo to Nate Smith
Most of the motors FIRST gives out in the kit are donated from the respective companies. In many cases, these companies are not set up in such a way that they can handle orders from teams or individuals. Hence, the requirement of going though a local supplier(and sometimes buying extras you don't need) in order to get replacement motors. In some cases, FIRST will list the suppliers in the back of the manual. The listed suppliers have told FIRST that they are willing to take orders direct from FIRST teams. If a supplier is not listed, they are not prepared for individual orders.

However, many of the motors we use are automobile-related. Check out your local junkyard to see what they have(if they let you go into the yard yourself to pull off the parts you need/want, even better).
__________________
Nate Smith
nsmith@smythsoft.com
12 seasons, 4 teams, and more time logged behind the scorekeeper's table than I care to remember...
returning for 2011? only time will tell...
  #4   Spotlight this post!  
Unread 03-30-2002, 07:36 PM
Matt Reiland's Avatar
Matt Reiland Matt Reiland is offline
'The' drive behind the drive
None #0226 (TEC CReW Hammerheads)
Team Role: Engineer
 
Join Date: May 2001
Rookie Year: 1999
Location: Troy Michigan
Posts: 712
Matt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond repute
A decent motor for a smaller bot are the Fisher Price motors which you can get at a PowerWheels service Center I think they cost us about $16 a piece. You could also buy some checp motors for RC type equipment at www.towerhobbies.com in the 540 size. The fisher price have a standard pinion which you can mate to fairly easily, most of the motors from tower you supply your own pinion normally with a set screw. The BOSCH motors are very powerful and you can buy them at a BOSCH repair center with or without the planetary gearbox. If you need to know more either post or send one of us an email someone should get back within a day or so.

matthew.reiland@gm.com
  #5   Spotlight this post!  
Unread 03-30-2002, 09:32 PM
Keith Chester's Avatar
Keith Chester Keith Chester is offline
HGFSP
FRC #0025 (Team 25)
Team Role: Alumni
 
Join Date: Mar 2002
Rookie Year: 2002
Location: North Brunswick, NJ
Posts: 382
Keith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to beholdKeith Chester is a splendid one to behold
Send a message via AIM to Keith Chester
Thanks. Now what about radio controllers? I know first provided the Isaac 32 (check spelling, sorry), which comes in around $1145. Now, has anybody tried building their own robot and has found a good radio controller for decent price. And yes, I know, Isaac is one of the best out there.
__________________
A proud graduate of 25.
Students. Teammates. Brothers.
Proud member of R.I.N.O.S., Rookies In Need Of Support.
  #6   Spotlight this post!  
Unread 03-30-2002, 10:41 PM
Unsung FIRST Hero
Nate Smith Nate Smith is offline
FRC Key Volunteer Trainer
AKA: CrazyNate
no team
 
Join Date: Jun 2001
Rookie Year: 1998
Location: Old Town, Maine
Posts: 1,029
Nate Smith is a splendid one to beholdNate Smith is a splendid one to beholdNate Smith is a splendid one to beholdNate Smith is a splendid one to beholdNate Smith is a splendid one to beholdNate Smith is a splendid one to beholdNate Smith is a splendid one to beholdNate Smith is a splendid one to behold
Send a message via AIM to Nate Smith Send a message via Yahoo to Nate Smith
Quote:
Originally posted by Replic
Thanks. Now what about radio controllers? I know first provided the Isaac 32...
The FIRST controller is very similar to the Issac in appearance, however, my discussions with FIRST and IFI/Innovation FIRST staff lead me to believe that the OI and RC hold custom firmware for FIRST as compared to the Issac system.
__________________
Nate Smith
nsmith@smythsoft.com
12 seasons, 4 teams, and more time logged behind the scorekeeper's table than I care to remember...
returning for 2011? only time will tell...
  #7   Spotlight this post!  
Unread 03-31-2002, 03:39 PM
Matt Reiland's Avatar
Matt Reiland Matt Reiland is offline
'The' drive behind the drive
None #0226 (TEC CReW Hammerheads)
Team Role: Engineer
 
Join Date: May 2001
Rookie Year: 1999
Location: Troy Michigan
Posts: 712
Matt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond reputeMatt Reiland has a reputation beyond repute
Make sure the Innovation is what you really want

Many, Many robots out there use off the shelf R/C equipment, only recently have you started seeing the Innovation controllers showing up at non-FIRST events. You can buy a 4-8 channel R/C package for 200-300 dollars then buy the speed controllers to go with it. For smaller motors you can probably go with the R/C types from a shop like tower. The Victor883's that we are using are quite capable of handling much more juice than we are giving them so they may be a bit overkill for a robot smaller than 130lbs but they are very robust. By using an off-the-shelf setup you will not have all of the trick features the innovation controller contains but you can get a driveable robot very cheap. You can get a 2 channel whell type radio for well under $100.

You may want to post to see if there are any teams out there that want to sell one of their older systems to you also. Since we get one each year teams that have about 5 years in probably have a stockpile of them they may want to get rid of an older one for a much reduced price.

Last edited by Matt Reiland : 03-31-2002 at 03:42 PM.
  #8   Spotlight this post!  
Unread 12-10-2002, 11:44 PM
kmcclary's Avatar
kmcclary kmcclary is offline
Founder 830/1015;Mentor 66/470/1502
FRC #0470 (Alpha Omega Robotics)
Team Role: Engineer
 
Join Date: Aug 2001
Rookie Year: 1994
Location: Ann Arbor, MI
Posts: 489
kmcclary has a reputation beyond reputekmcclary has a reputation beyond reputekmcclary has a reputation beyond reputekmcclary has a reputation beyond reputekmcclary has a reputation beyond reputekmcclary has a reputation beyond reputekmcclary has a reputation beyond reputekmcclary has a reputation beyond reputekmcclary has a reputation beyond reputekmcclary has a reputation beyond reputekmcclary has a reputation beyond repute
Re: Help picking motors

Quote:
Originally posted by Replic
My dad has recently become as fascinated with FIRST as I, and we have decided as a father/son project to begin the building of a robot of our own, much smaller of course.
One of the questions I have no answer to yet is- what kind of motor shall I use, and where can I get these motors? Keep in mind, I don't have a budget the size of the FIRST teams.
My first question is "do you have some electronics experience"? There are ways to build this CHEAPLY if you do.

If you wish to "work at this scale", you basically need four things:

1) A set of motors, on a platform
2) Power
3) Some kind of control system.
3a) Autonomous robots needs a CPU of some kind, and/or some sensors.
3B) Radio control needs both the radio link and some kind of decoder at the receiver side to talk to the high current motor drivers.
4) Some motor driver circuitry that can handle the motor's current needs.

IMHO, the cheapest way to get into this "scale" is the following:

1 - the motors and platform) Find a thrown out Fisher Price or other "kid's riding jeep". The batteries fail all of the time, and you can often get them for FREE. Make sure you get one that uses a PAIR of motors instead of just one. This gives you your platform and a pair of FP motors with gearboxes. If possible, find one that uses a standalone "tube frame" instead of the ones that rely on the plastic body to hold things together. If you can find one with a tube frame, throw away the body and add a simple rectangular board to hold stuff. If you can't, you'll have to cut an odd shaped piece of plywood to conform to the funny shape of the side supports.

Separate the wiring between the motors (they're normally tied together). This gives you two motors for "differential steering". Now replace the front tires with casters from a hardware store and your basic frame is complete.

BTW, I have found this works better if you consider the motor side as now the "front". The "tail" then swings around behind as you drive it, instead of it "brandishing a spear" in front of it as it moves.

2) For power, you can use a standard "maintenance free" car battery (to prevent acid spills). This is cheaper than a gel cell, but it doesn't like to be deep cycled. For a few more dollars you can get a Marine Battery that IS designed for Deep Cycling. You'll need a car styled battery charger for it. You can often find used car battery chargers in the "cheapie" for sale ads in the newspapers.

3a - Control System) Pick up one of several Basic Stamp style micros (such as from Parallax), or a LEGO RCX Mindstorms kit. This gives you a processor. "Nuts and Volts" magazine has a TON of ads for them. You can get into a processor system often for under $100 if you wire up your own board (under $200 if you don't or can't).

3b - Radio Control) If you are NOT going autonomous, there are various ways to create a cheap radio link, including surplus companies or ones like Jameco that have raw transmitter/receiver board pairs that are fairly inexpensive. Which system depends highly on how tightly you wish to control the robot. With straight RC control, you can use off the shelf RC car hardware. If you're commanding a CPU which then commands the power controls, there are inexpensive "remote control" raw transmitter and receiver pairs or TV remote "IR receiver" circuits that can be attached directly to a CPU. Either send "ritual commands" to the CPU to have the robot execute preprogrammed actions.

4 - Motor Power Control Circuits) To drive each motor you'll need either a full H-bridge control, or a single MOSFET circuit with an optional reversing relay. Once you have the first three items dealt with, I can show you how to build this.

BTW... A group I'm with is currently creating a set of VERY inexpensive control circuit PCBs to allow "kid's riding jeep motor hacking" from Stamps, or even an RCX brick! We're hoping to bridge the gap between Lego League and FIRST with them, as well as soon sponsor some offseason contests using them for teams with spare kit parts. If interested, email me after the 2003 build about it.

- Keith
__________________
Keith McClary - Organizer/Mentor/Sponsor - Ann Arbor MI area FIRST teams
ACTI - Automation Computer Technologies, Inc. (Sponsoring FIRST teams since 2001!)
MI Robot Club (Trainer) / GO-Tech Maker's Club / RepRap-Michigan) / SEMI CNC Club
"Certifiably Insane": Started FIVE FRC teams & many robot clubs (so far)!
2002: 830 "Rat Pack" | 2003-5;14: 1015;1076 "Pi Hi Samurai" | 2005-6: 1549 "Washtenuts"/"Fire Traxx"
2005-(on): 1502 "Technical Difficulties" | 2006-(on): FIRST Volunteer!
2009-(on): 470 "Alpha Omega" | WAFL | Sponsor & "Floating Engineer" for MI Dist 13 (Washtenaw Cnty)
2011: 3638 "Tigertrons" | 2013-(on): 4395 "ViBots" | 2014-(on) 66 "Grizzlies"
"Home" Teams: 66, 470, 1076, 1502, 4395
Local FIRST alumni at or coming to Ann Arbor (UM/EMU/WCC/Cleary)?
...We Want YOU as a Mentor! Please email me for info!
Support CDF Reputation - If a posting helped, thank 'em with rep points!
"It must be FRC build season when your spouse and children become 'Action Items 8 & 9'..."

Last edited by kmcclary : 12-10-2002 at 11:47 PM.
  #9   Spotlight this post!  
Unread 12-21-2002, 12:32 PM
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
Posts: 9,983
Al Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond repute
Another store you can try is located here...
http://www.sciplus.com/stores.cfm
They have stores in Chicago and Milwaukee and have a variety of surplus motors of all kinds and sizes. They have the Fisher Price motor with transmission and Mabuchi and Johnson motors too. Also have all kinds of mechanical stuff.
There is also a busload of Internet sites dedicated to robot building. Good luck.
__________________
Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
________________________
All is better now, NOS parts are working fine. Why does this year's game remind me of Violet in Willie Wonka? Hmmmm, I see blueberries!
  #10   Spotlight this post!  
Unread 12-21-2002, 02:52 PM
Bduggan04's Avatar
Bduggan04 Bduggan04 is offline
I bent my wookie...
AKA: Bryan Duggan
#0027 (Team Rush)
Team Role: College Student
 
Join Date: Mar 2002
Location: Clarkston, MI
Posts: 290
Bduggan04 will become famous soon enoughBduggan04 will become famous soon enough
The Atwood Motors can be found in camper jacks. We got spares last year when the company was out of stock by buying these power camper jacks. However, the jacks run pretty expensive and you probably wouldn't want to pay for them unless you wanted to keep really close to the FIRST kit of parts.
  #11   Spotlight this post!  
Unread 12-21-2002, 04:44 PM
Adam Y.'s Avatar
Adam Y. Adam Y. is offline
Adam Y.
no team (?????)
 
Join Date: Mar 2002
Location: Long Island
Posts: 1,979
Adam Y. is a splendid one to beholdAdam Y. is a splendid one to beholdAdam Y. is a splendid one to beholdAdam Y. is a splendid one to beholdAdam Y. is a splendid one to beholdAdam Y. is a splendid one to beholdAdam Y. is a splendid one to behold
Send a message via AIM to Adam Y.
www.meci.com This place also has some nice motors also. www.acroname.com This place has nice sensors, microcontrollers, omniwheels, and lego kits cheap. www.lynxmotion.com This place has miniture robot kits.
__________________
If either a public officer or any one else saw a person attempting to cross a bridge which had been ascertained to be unsafe, and there were no time to warn him of his danger, they might seize him and turn him back without any real infringement of his liberty; for liberty consists in doing what one desires, and he does not desire to fall into the river. -Mill
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
PWM and burning out motors patrickrd Technical Discussion 7 06-19-2003 02:30 PM
Looking for practice motors & extra tape drive parts? archiver 2000 1 06-23-2002 09:54 PM
Suppose you want seat motors... archiver 2000 0 06-23-2002 09:50 PM
"Motors and Drive train edition" of Fresh From the Forum Ken Leung CD Forum Support 6 01-29-2002 11:32 AM
Drill Motors TF8 Motors 19 12-12-2001 12:13 PM


All times are GMT -5. The time now is 11:24 PM.

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


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi