Go to Post You must wear safety glasses at all times, so please bring them. - Don Wright [more]
Home
Go Back   Chief Delphi > Technical > Motors
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
  #1   Spotlight this post!  
Unread 04-03-2011, 12:48
Don Wright's Avatar
Don Wright Don Wright is offline
Registered User
FRC #0469
Team Role: Engineer
 
Join Date: Jan 2003
Rookie Year: 2003
Location: Livonia, MI
Posts: 683
Don Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond repute
Send a message via MSN to Don Wright Send a message via Yahoo to Don Wright
Alternate Tetrix Motors and Batteries

Being a team that never settles, we will continue to evolve or mini-bot until the last day of the season. Now it's time to try some more of those innovative ideas...

Unfortunately, some ideas might put a little more stress on the poor Tetrix motors than we like...and at $30 a pop...it gets expensive.

Before I go further I want to clearly say I KNOW THIS ISN'T LEGAL FOR COMPETITION.

What I want to do is find some alternative motors that have similar characteristics as the Tetrix motors for for a realistic price (i.e. $1-$5 or less which is about what they are worth retail...). We could then use these for R&D and then when we are finally ready to test with real Tetrix motors, we switch... I'm probably going to do the same with the Tetrix batteries...

So...before I start digging...has anybody already looked into this? We might even be able to find the exact motor somewhere else wholesale without the gearbox and the $20 Tetrix sticker...

For example, I'll start at the easy places:
http://www.robotmarketplace.com/prod..._ungeared.html
http://www.goldmine-elec-products.co....asp?dept=1104
__________________
Donald F. Wright Jr.
Product Manager
AVL Instrumentation & Test Systems, Inc.
  #2   Spotlight this post!  
Unread 04-03-2011, 13:46
MrForbes's Avatar
MrForbes MrForbes is online now
Registered User
AKA: Jim
FRC #1726 (N.E.R.D.S.)
Team Role: Mentor
 
Join Date: Feb 2006
Rookie Year: 2006
Location: Sierra Vista AZ
Posts: 6,033
MrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond reputeMrForbes has a reputation beyond repute
Re: Alternate Tetrix Motors and Batteries

The first step would be to define the mechanical specs, and analyze the performance of the legal motor. Then you can search for other motors with similar size/performance.

Someone might have done it already....what have you found in your searches so far?
  #3   Spotlight this post!  
Unread 04-03-2011, 15:45
Trent B Trent B is offline
College Mentor
AKA: Trent Borman
no team (Surviving Grad School)
Team Role: Alumni
 
Join Date: Dec 2008
Rookie Year: 2008
Location: Ames, IA
Posts: 479
Trent B is a splendid one to beholdTrent B is a splendid one to beholdTrent B is a splendid one to beholdTrent B is a splendid one to beholdTrent B is a splendid one to beholdTrent B is a splendid one to beholdTrent B is a splendid one to beholdTrent B is a splendid one to behold
Send a message via AIM to Trent B Send a message via Yahoo to Trent B
Re: Alternate Tetrix Motors and Batteries

You could use a lower fuse on the battery, the thermal protect wires or modify the burned out motors.

The part that cooks is an inductor that looks like a resistor, on our motor that burned up we simply cut it out, soldered a piece of copper wire in where it used to be and epoxied the motor shut (we were having difficulties getting the back plates out due to the tiny tabs so we just used tin snips to cut the tabs off) not competition legal but near identical performance without cooking.
__________________
Former 2502 (Talon) Captain and 3928 (Neutrino) Mentor, currently teamless and attending Penn State for graduate school.
Have questions about Iowa State University or Penn State University? Feel free to email or PM me
  #4   Spotlight this post!  
Unread 04-03-2011, 15:48
Don Wright's Avatar
Don Wright Don Wright is offline
Registered User
FRC #0469
Team Role: Engineer
 
Join Date: Jan 2003
Rookie Year: 2003
Location: Livonia, MI
Posts: 683
Don Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond repute
Send a message via MSN to Don Wright Send a message via Yahoo to Don Wright
Re: Alternate Tetrix Motors and Batteries

Quote:
"what have you found in your searches so far?
I haven't really started looking seriously yet... That is this weekends project.

Quote:
The part that cooks is an inductor that looks like a resistor, on our motor that burned up we simply cut it out, soldered a piece of copper wire in where it used to be and epoxied the motor shut (we were having difficulties getting the back plates out due to the tiny tabs so we just used tin snips to cut the tabs off) not competition legal but near identical performance without cooking.
Yep...done that a few times already. But if I can get a bunch of $1-$5 motors, that is much easier...
__________________
Donald F. Wright Jr.
Product Manager
AVL Instrumentation & Test Systems, Inc.
  #5   Spotlight this post!  
Unread 04-03-2011, 20:16
Chris is me's Avatar
Chris is me Chris is me is offline
no bag, vex only, final destination
AKA: Pinecone
FRC #0228 (GUS Robotics); FRC #2170 (Titanium Tomahawks)
Team Role: Mentor
 
Join Date: Dec 2008
Rookie Year: 2006
Location: Glastonbury, CT
Posts: 7,784
Chris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond reputeChris is me has a reputation beyond repute
Send a message via AIM to Chris is me
Re: Alternate Tetrix Motors and Batteries

Does anyone have the specs on the motor with the gearhead removed? We kind of need that as a start.
__________________
Mentor / Drive Coach: 228 (2016-?)
--2016 Waterbury SFs (with 3314, 3719), RIDE #2 Seed / Winners (with 1058, 6153), Carver QFs (with 503, 359, 4607)
Mentor / Consultant Person: 2170 (2017-?)
.
College Mentor: 2791 (2010-2015)
-- 2015 TVR Motorola Quality, FLR GM Industrial Design -- 2014 FLR Motorola Quality / SFs (with 341, 4930)
-- 2013 BAE Motorola Quality, WPI Regional #1 Seed / Delphi Excellence in Engineering / Finalists (with 20, 3182)
-- 2012 BAE Imagery / Finalists (with 1519, 885), CT Xerox Creativity / SFs (with 2168, 118)
Student: 1714 (2009) - 2009 MN 10K Lakes Regional Winners (with 2826, 2470)
2791 Build Season Photo Gallery - Look here for mechanism photos My Robotics Blog (Updated April 11 2014)
  #6   Spotlight this post!  
Unread 04-03-2011, 21:42
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
Posts: 10,798
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
Re: Alternate Tetrix Motors and Batteries

Don,
As I was going home a few days ago, a motor manufacturer's truck went screaming by me. When I looked up, painted on the side of the truck was a motor that looked exactly like the Tetrix motor. I was trying to stay on the road so I didn't get a good look at the name but the address was in one of the northern suburbs of Chicago. Have you tried contacting Pitsco/Tetrix? If I was them, I would like to know there was second source on motors to turn to for production.

Also check out Precision Microdrives. https://secure.precisionmicrodrives....1282002218fc0c

Al
__________________
Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
________________________
Storming the Tower since 1996.
  #7   Spotlight this post!  
Unread 05-03-2011, 08:50
Duncan Macdonald's Avatar
Duncan Macdonald Duncan Macdonald is offline
Globe Motor Fan Club
FRC #0610 (Crescent Robotics)
Team Role: Alumni
 
Join Date: Feb 2006
Rookie Year: 2006
Location: Vancouver, Canada
Posts: 190
Duncan Macdonald has a reputation beyond reputeDuncan Macdonald has a reputation beyond reputeDuncan Macdonald has a reputation beyond reputeDuncan Macdonald has a reputation beyond reputeDuncan Macdonald has a reputation beyond reputeDuncan Macdonald has a reputation beyond reputeDuncan Macdonald has a reputation beyond reputeDuncan Macdonald has a reputation beyond reputeDuncan Macdonald has a reputation beyond reputeDuncan Macdonald has a reputation beyond reputeDuncan Macdonald has a reputation beyond repute
Send a message via MSN to Duncan Macdonald
Re: Alternate Tetrix Motors and Batteries

What we've had some success with is taking 2 burned out motors and shorting where the inductor used to be. The motor still behaves similarly and as long as you don't burn up the coils they are a little more resilient.
__________________
Queen's Applied Science '13, Applied Mathematics
  #8   Spotlight this post!  
Unread 06-03-2011, 07:17
Richard Wallace's Avatar
Richard Wallace Richard Wallace is offline
I live for the details.
FRC #3620 (Average Joes)
Team Role: Engineer
 
Join Date: Jan 2003
Rookie Year: 1996
Location: Southwestern Michigan
Posts: 3,674
Richard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond reputeRichard Wallace has a reputation beyond repute
Re: Alternate Tetrix Motors and Batteries

Quote:
Originally Posted by Chris is me View Post
Does anyone have the specs on the motor with the gearhead removed? We kind of need that as a start.
I posted some test data for the Tetrix DC Drive Motor without its gearhead here.

An engineer where I work has been using a similar motor for some product development testing.
__________________
Richard Wallace

Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
since 2003

I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)
  #9   Spotlight this post!  
Unread 14-03-2011, 09:26
IKE's Avatar
IKE IKE is offline
Not so Custom User Title
AKA: Isaac Rife
no team (N/A)
Team Role: Mechanical
 
Join Date: Jan 2008
Rookie Year: 2003
Location: Michigan
Posts: 2,152
IKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond repute
Re: Alternate Tetrix Motors and Batteries

Was anybody able to find the cheapo development version?
  #10   Spotlight this post!  
Unread 14-03-2011, 11:59
Don Wright's Avatar
Don Wright Don Wright is offline
Registered User
FRC #0469
Team Role: Engineer
 
Join Date: Jan 2003
Rookie Year: 2003
Location: Livonia, MI
Posts: 683
Don Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond reputeDon Wright has a reputation beyond repute
Send a message via MSN to Don Wright Send a message via Yahoo to Don Wright
Re: Alternate Tetrix Motors and Batteries

Unfortunately, I haven't yet. Not only has my research time been limited, but most of the places that I'm looking don't list good specs on the motors for comparison and I am coming to the conclusion it would take a lot of ordering and testing just to hopefully find one close and I am not sure I have the time for that...
__________________
Donald F. Wright Jr.
Product Manager
AVL Instrumentation & Test Systems, Inc.
  #11   Spotlight this post!  
Unread 14-03-2011, 13:29
IKE's Avatar
IKE IKE is offline
Not so Custom User Title
AKA: Isaac Rife
no team (N/A)
Team Role: Mechanical
 
Join Date: Jan 2008
Rookie Year: 2003
Location: Michigan
Posts: 2,152
IKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond reputeIKE has a reputation beyond repute
Re: Alternate Tetrix Motors and Batteries

Quote:
Originally Posted by Don Wright View Post
Unfortunately, I haven't yet. Not only has my research time been limited, but most of the places that I'm looking don't list good specs on the motors for comparison and I am coming to the conclusion it would take a lot of ordering and testing just to hopefully find one close and I am not sure I have the time for that...
I looked through several sources on the weekend. Some seemed to have motors of similar dimensions, but the power level was off. I may have found some good future sources for COTS gearboxes though:

http://kinmore.en.alibaba.com/produc....html#products

http://www.kysanelectronics.com/prod...$@#$@#$@#_search.php

Looks like you can get teh full family of "banebots" motors with gearboxes for a pretty good price. I wonder if their 775s have shorts as well.
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


All times are GMT -5. The time now is 15:10.

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