OCCRA
Go to Post I'd be more worried about getting struck by lightning right after winning the lottery. :p - evulish [more]
Home
Go Back   Chief Delphi > ChiefDelphi.com Website > Extra Discussion
CD-Events   CD-Media   CD-Spy   FRC-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Reply
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 02-18-2010, 04:45 AM
psyco_klown's Avatar
psyco_klown psyco_klown is offline
aka Shawn Burgen
FRC #0839 (Rosie Robotics)
Team Role: Mentor
 
Join Date: Feb 2003
Rookie Year: 2002
Location: agawam,ma
Posts: 86
psyco_klown is a splendid one to beholdpsyco_klown is a splendid one to beholdpsyco_klown is a splendid one to beholdpsyco_klown is a splendid one to beholdpsyco_klown is a splendid one to beholdpsyco_klown is a splendid one to behold
pic: Window sprocket adaptor

Reply With Quote
  #2   Spotlight this post!  
Unread 02-18-2010, 04:46 AM
GUI GUI is offline
Registered User
AKA: Gary
FRC #4183 (Bit Buckets)
Team Role: Mentor
 
Join Date: Nov 2006
Rookie Year: 2006
Location: Tucson, AZ
Posts: 217
GUI is a splendid one to beholdGUI is a splendid one to beholdGUI is a splendid one to beholdGUI is a splendid one to beholdGUI is a splendid one to beholdGUI is a splendid one to beholdGUI is a splendid one to behold
Send a message via Yahoo to GUI
Re: pic: Window sprocket adaptor

Out of curiosity, how was this made? I'm guessing the splines were broached?
__________________
-Gary Forbes
Reply With Quote
  #3   Spotlight this post!  
Unread 02-18-2010, 05:44 AM
Travis Hoffman's Avatar Unsung FIRST Hero
Travis Hoffman Travis Hoffman is offline
Canada!!!!!!!11111!!111
FRC #0048 (Delphi E.L.I.T.E.)
Team Role: Engineer
 
Join Date: Sep 2001
Rookie Year: 2001
Location: Warren, Ohio USA
Posts: 3,838
Travis Hoffman has a reputation beyond reputeTravis Hoffman has a reputation beyond reputeTravis Hoffman has a reputation beyond reputeTravis Hoffman has a reputation beyond reputeTravis Hoffman has a reputation beyond reputeTravis Hoffman has a reputation beyond reputeTravis Hoffman has a reputation beyond reputeTravis Hoffman has a reputation beyond reputeTravis Hoffman has a reputation beyond reputeTravis Hoffman has a reputation beyond reputeTravis Hoffman has a reputation beyond repute
Re: pic: Window sprocket adaptor

Quote:
Originally Posted by GUI View Post
Out of curiosity, how was this made? I'm guessing the splines were broached?
Wire EDM / Lathe? First one to guess correctly gets one for free, right?
__________________
Travis Hoffman, Enginerd, FRC Team 48 Delphi E.L.I.T.E.
Encouraging Learning in Technology and Engineering - www.delphielite.com
NEOFRA - Northeast Ohio FIRST Robotics Alliance
NEOFRA / Delphi E.L.I.T.E. FLL Regional Partner
Reply With Quote
  #4   Spotlight this post!  
Unread 02-18-2010, 06:58 AM
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: 3,027
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: pic: Window sprocket adaptor

Quote:
Originally Posted by Travis Hoffman
Wire EDM / Lathe? First one to guess correctly gets one for free, right?
You could make them with a 4mm keyway broach, but I'm guessing they were made via wire EDM, since it's a lot easier than lining up six broaches accurately. If I guessed right, Travis can have the free one since literally ten minutes ago I finished machining nine 18t 25-pitch Denso motor hubs for GUS.



// Still laughing over the timing of our photos...
__________________
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.
Reply With Quote
  #5   Spotlight this post!  
Unread 02-18-2010, 07:29 AM
psyco_klown's Avatar
psyco_klown psyco_klown is offline
aka Shawn Burgen
FRC #0839 (Rosie Robotics)
Team Role: Mentor
 
Join Date: Feb 2003
Rookie Year: 2002
Location: agawam,ma
Posts: 86
psyco_klown is a splendid one to beholdpsyco_klown is a splendid one to beholdpsyco_klown is a splendid one to beholdpsyco_klown is a splendid one to beholdpsyco_klown is a splendid one to beholdpsyco_klown is a splendid one to behold
Re: pic: Window sprocket adaptor

Travis hoffman is correct. They were lathed first, then wire edm. They took about 1hr 1/2 to make. The adapter is made out of 7075 aluminum and weight less then the plastic adapter they give in the kit. We also created an AM sprocket adapter. We are looking at producing more for teams only if there is a demand for them. Well art you can stop by our pit on Saturday at suffield shakedown and check one out. Travis pm me and Ill send one out you can test with and give me feed back.



That is funny we posted about the same time
__________________

Shawn Burgen-FRC Team 839 Mentor
Team 839 FTC Mentor
Reply With Quote
  #6   Spotlight this post!  
Unread 02-18-2010, 10:03 AM
Jeff 801's Avatar
Jeff 801 Jeff 801 is offline
Registered User
no team
Team Role: College Student
 
Join Date: Jun 2006
Rookie Year: 2004
Location: Florida
Posts: 347
Jeff 801 has a reputation beyond reputeJeff 801 has a reputation beyond reputeJeff 801 has a reputation beyond reputeJeff 801 has a reputation beyond reputeJeff 801 has a reputation beyond reputeJeff 801 has a reputation beyond reputeJeff 801 has a reputation beyond reputeJeff 801 has a reputation beyond reputeJeff 801 has a reputation beyond reputeJeff 801 has a reputation beyond reputeJeff 801 has a reputation beyond repute
Re: pic: Window sprocket adaptor

Quote:
Originally Posted by artdutra04 View Post
You could make them with a 4mm keyway broach, but I'm guessing they were made via wire EDM, since it's a lot easier than lining up six broaches accurately. If I guessed right, Travis can have the free one since literally ten minutes ago I finished machining nine 18t 25-pitch Denso motor hubs for GUS.


// Still laughing over the timing of our photos...

How do you plan on keeping the sprocket retained on the motor?
Reply With Quote
  #7   Spotlight this post!  
Unread 02-18-2010, 10:14 AM
grosh grosh is offline
Registered User
FRC #2147
 
Join Date: Feb 2008
Location: Spokane, WA
Posts: 92
grosh is an unknown quantity at this point
Re: pic: Window sprocket adaptor

Quote:
Originally Posted by Jeff 801 View Post
How do you plan on keeping the sprocket retained on the motor?
How much do you want for a set of four?
Reply With Quote
  #8   Spotlight this post!  
Unread 02-18-2010, 10:16 AM
Unsung FIRST Hero
Mike Betts Mike Betts is offline
Electrical Engineer
no team
Team Role: Engineer
 
Join Date: Dec 2001
Rookie Year: 1995
Location: Homosassa, FL
Posts: 1,443
Mike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond repute
Re: pic: Window sprocket adaptor

Quote:
Originally Posted by artdutra04 View Post
You could make them with a 4mm keyway broach, but I'm guessing they were made via wire EDM, since it's a lot easier than lining up six broaches accurately. If I guessed right, Travis can have the free one since literally ten minutes ago I finished machining nine 18t 25-pitch Denso motor hubs for GUS.



// Still laughing over the timing of our photos...
Art,

NINE? You know that you're only allowed 2 windows on a robot...

JK... Nice Job...

Mike
__________________
Mike Betts

Alumnus, Team 3518, Panthrobots, 2011
Alumnus, Team 177, Bobcat Robotics, 1995 - 2010
LRI, Connecticut Regional, 2007-2010
LRI, WPI Regional, 2009 - 2010
RI, South Florida Regional, 2012 - 2013

As easy as 355/113...
Reply With Quote
  #9   Spotlight this post!  
Unread 02-18-2010, 10:29 AM
JHSmentor's Avatar
JHSmentor JHSmentor is offline
Registered User
AKA: Bryan Molloseau
FRC #3210 (Falcons)
Team Role: Mentor
 
Join Date: Jan 2008
Rookie Year: 2008
Location: Oregon
Posts: 84
JHSmentor is a name known to allJHSmentor is a name known to allJHSmentor is a name known to allJHSmentor is a name known to allJHSmentor is a name known to allJHSmentor is a name known to all
Re: pic: Window sprocket adaptor

ummm - how do I get some? I wish we had the ability to do stuff like this.
Reply With Quote
  #10   Spotlight this post!  
Unread 02-18-2010, 10:35 AM
EricLeifermann's Avatar
EricLeifermann EricLeifermann is offline
Registered User
FRC #2826 (Wave Robotics)
Team Role: Engineer
 
Join Date: Jan 2007
Rookie Year: 2001
Location: Wisconsin
Posts: 785
EricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond reputeEricLeifermann has a reputation beyond repute
Re: pic: Window sprocket adaptor

Quote:
Originally Posted by Mike Betts View Post
Art,

NINE? You know that you're only allowed 2 windows on a robot...

JK... Nice Job...

Mike
Pretty sure you are allowed 4 window motors on the robot, seeing as we received 4 in the kit.
__________________
2002-2005 Appleton East High School: Team 93
2005-2011 Michigan Technological University: Team 857
2012-Present Wave Robotics Team 2826



Reply With Quote
  #11   Spotlight this post!  
Unread 02-18-2010, 11:44 AM
=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: 1,252
=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: pic: Window sprocket adaptor

You better make sure those motors are always turning at the same speed...

...otherwise its bye-bye Mr. Denso
__________________
"Cooperation; because life is a team sport"
-Philip J. Fry
Reply With Quote
  #12   Spotlight this post!  
Unread 02-18-2010, 11:44 AM
Unsung FIRST Hero
Mike Betts Mike Betts is offline
Electrical Engineer
no team
Team Role: Engineer
 
Join Date: Dec 2001
Rookie Year: 1995
Location: Homosassa, FL
Posts: 1,443
Mike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond reputeMike Betts has a reputation beyond repute
Re: pic: Window sprocket adaptor

Quote:
Originally Posted by EricLeifermann View Post
Pretty sure you are allowed 4 window motors on the robot, seeing as we received 4 in the kit.
Eric,

Thank you for pointing that out to me. We only received 2 last year and I missed the increase.

Regards,

mike
__________________
Mike Betts

Alumnus, Team 3518, Panthrobots, 2011
Alumnus, Team 177, Bobcat Robotics, 1995 - 2010
LRI, Connecticut Regional, 2007-2010
LRI, WPI Regional, 2009 - 2010
RI, South Florida Regional, 2012 - 2013

As easy as 355/113...
Reply With Quote
  #13   Spotlight this post!  
Unread 02-18-2010, 12:42 PM
psyco_klown's Avatar
psyco_klown psyco_klown is offline
aka Shawn Burgen
FRC #0839 (Rosie Robotics)
Team Role: Mentor
 
Join Date: Feb 2003
Rookie Year: 2002
Location: agawam,ma
Posts: 86
psyco_klown is a splendid one to beholdpsyco_klown is a splendid one to beholdpsyco_klown is a splendid one to beholdpsyco_klown is a splendid one to beholdpsyco_klown is a splendid one to beholdpsyco_klown is a splendid one to behold
Re: pic: Window sprocket adaptor

http://www.facebook.com/home.php?#!/...8&id=530290273
the motors hold the adapter from moving. We already have taken care of the motors at moving different speeds.
__________________

Shawn Burgen-FRC Team 839 Mentor
Team 839 FTC Mentor
Reply With Quote
  #14   Spotlight this post!  
Unread 02-19-2010, 12:20 AM
jspatz1's Avatar
jspatz1 jspatz1 is offline
Registered User
AKA: Jeff
FRC #1986 (Team Titanium)
Team Role: Mentor
 
Join Date: Jan 2008
Rookie Year: 2007
Location: Lee's Summit, MO
Posts: 765
jspatz1 has a reputation beyond reputejspatz1 has a reputation beyond reputejspatz1 has a reputation beyond reputejspatz1 has a reputation beyond reputejspatz1 has a reputation beyond reputejspatz1 has a reputation beyond reputejspatz1 has a reputation beyond reputejspatz1 has a reputation beyond reputejspatz1 has a reputation beyond reputejspatz1 has a reputation beyond reputejspatz1 has a reputation beyond repute
Send a message via AIM to jspatz1 Send a message via Skype™ to jspatz1
Re: pic: Window sprocket adaptor

We would be interested to know if you have any trouble with your Denso motors overheating and cutting out. We had two Densos mated exactly this way for our swerve steering, but had to switch to steering with a CIM because the Densos would overheat and stop. Perhaps on a kicker they do not run enough to be problem. They are window motors so for safety they are designed to cut out when they stall on something and heat up. Not really the ideal motor to build robots with.
__________________
Reply With Quote
  #15   Spotlight this post!  
Unread 02-19-2010, 01:01 AM
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: 3,027
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: pic: Window sprocket adaptor

Quote:
Originally Posted by jspatz1 View Post
We would be interested to know if you have any trouble with your Denso motors overheating and cutting out. We had two Densos mated exactly this way for our swerve steering, but had to switch to steering with a CIM because the Densos would overheat and stop. Perhaps on a kicker they do not run enough to be problem. They are window motors so for safety they are designed to cut out when they stall on something and heat up. Not really the ideal motor to build robots with.
We did, but that's because the theoretical load I calculated was between 1/2 and 1/3 of the observed necessary torque*. Using this figure, I found we were loading the Denso motors to 20 amps... and their stall current is about 24 amps. So using the observed torque, I back tracked and redid the gear ratio to maximize the power output and lower the current draw to a reasonable amount.

* I've pinned the reason for the discrepancy down to a few SWAGs at coefficients of friction between different materials not listed in the commonly available engineering tables like Machinery's Handbook. In the future I'll probably perform tests to experimentally ascertain these values instead of guestimating values at 2am...
__________________
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.
Reply With Quote
Reply


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
CAD (Inventor) Wireless Adaptor? delsaner General Forum 3 02-02-2010 10:40 AM
pic: Custom Machined Aluminum #25 Sprocket Holtzman Extra Discussion 24 10-10-2007 07:50 AM
AC Adaptor? Jake M Electrical 28 06-12-2007 01:26 PM
pic: Dual sprocket Dewalt drive Andy Brockway Extra Discussion 4 12-05-2006 08:05 AM
pic: Sprocket mounting for window motor team222badbrad Extra Discussion 3 02-22-2005 03:06 AM


All times are GMT -5. The time now is 08:19 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