Go to Post Woo for speculation! - Eugenia Gabrielov [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 17-03-2011, 17:43
implosionprez's Avatar
implosionprez implosionprez is offline
Registered User
AKA: Ty
FRC #2484 (Team Implosion)
Team Role: Mentor
 
Join Date: Jan 2011
Rookie Year: 2008
Location: Woods Cross, Utah
Posts: 74
implosionprez is an unknown quantity at this point
Minibot motors/fuses

We have burned out our minibot motors since ship day, and we want to try to make sure that we don't burn any out during competition, since they're 50 bucks a set.

Does reducing the amperage of the fuse in the battery actually help? I don't know a lot about electronics. If we put in a smaller amperage fuse, will it blow when the motors stall, before the motors burn out? What amperage fuse should be used, instead of the original 20 amp fuse?
__________________
  #2   Spotlight this post!  
Unread 17-03-2011, 18:07
cgmv123's Avatar
cgmv123 cgmv123 is offline
FRC RI/FLL Field Manager
AKA: Max Vrany
FRC #1306 (BadgerBOTS)
Team Role: College Student
 
Join Date: Jan 2011
Rookie Year: 2011
Location: Madison, WI
Posts: 2,085
cgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond repute
Re: Minibot motors/fuses

We used 3 and 5 amps last weekend. No motors blown!
__________________
BadgerBOTS Robotics|@team1306|Facebook: BadgerBOTS
2016 FIRST Championship Tesla Division | 2016 Wisconsin Regional Engineering Inspiration Award

2015 FIRST Championship Carson Division | 2015 Wisconsin Regional Chairman's Award

2013 FIRST Championship Curie Division | 2013 Wisconsin Regional Chairman's Award

2012 FIRST Championship Archimedes Division | 2012 Wisconsin Regional Engineering Inspiration Award, Woodie Flowers Finalist Award (Lead Mentor Ben Senson)

  #3   Spotlight this post!  
Unread 17-03-2011, 18:07
implosionprez's Avatar
implosionprez implosionprez is offline
Registered User
AKA: Ty
FRC #2484 (Team Implosion)
Team Role: Mentor
 
Join Date: Jan 2011
Rookie Year: 2008
Location: Woods Cross, Utah
Posts: 74
implosionprez is an unknown quantity at this point
Re: Minibot motors/fuses

3 and 5???
__________________
  #4   Spotlight this post!  
Unread 17-03-2011, 19:23
Teched3 Teched3 is offline
Hodge1
FRC #0175 (BuzzRobotics)
Team Role: Mentor
 
Join Date: Apr 2006
Rookie Year: 1996
Location: Connecticut
Posts: 319
Teched3 has much to be proud ofTeched3 has much to be proud ofTeched3 has much to be proud ofTeched3 has much to be proud ofTeched3 has much to be proud ofTeched3 has much to be proud ofTeched3 has much to be proud ofTeched3 has much to be proud ofTeched3 has much to be proud of
Smile Re: Minibot motors/fuses

Quote:
Originally Posted by implosionprez View Post
We have burned out our minibot motors since ship day, and we want to try to make sure that we don't burn any out during competition, since they're 50 bucks a set.

Does reducing the amperage of the fuse in the battery actually help? I don't know a lot about electronics. If we put in a smaller amperage fuse, will it blow when the motors stall, before the motors burn out? What amperage fuse should be used, instead of the original 20 amp fuse?
Use the PTC leads allowed to feed the motors, and start with a low amp fuse on the main battery fuse - say five amps and work up to seven amps or so. Hard to advise since we don't know your minibot weight, or what speed you are using to climb the pole. the larger the drive wheel, the greater the amp draw for the same weight. reduce weight, increase wheel diameter to get you to run at maximum power. Look for the motor curves in the Manual documentation.

__________________
Sweat the details
Why is there never enough time to do it right, but always enough time to do it again!
Even if you're on the right track, if you sit still, you'll get run over!!!

Last edited by Teched3 : 17-03-2011 at 19:32. Reason: Added info
  #5   Spotlight this post!  
Unread 18-03-2011, 07:00
jreuter jreuter is offline
Registered User
FRC #1073 (Force Team)
Team Role: Mentor
 
Join Date: Jan 2009
Rookie Year: 2007
Location: Hollis, NH
Posts: 33
jreuter has a spectacular aura aboutjreuter has a spectacular aura about
Re: Minibot motors/fuses

By "use PTC leads", I recommend the motor power cable that includes the thermal circuit breaker. We use these, and changed to a 5A fuse, and have not had problems.

http://www.legoeducation.us/store/detail.aspx?ID=2135

Good luck!
-Jeff
  #6   Spotlight this post!  
Unread 18-03-2011, 16:47
implosionprez's Avatar
implosionprez implosionprez is offline
Registered User
AKA: Ty
FRC #2484 (Team Implosion)
Team Role: Mentor
 
Join Date: Jan 2011
Rookie Year: 2008
Location: Woods Cross, Utah
Posts: 74
implosionprez is an unknown quantity at this point
Re: Minibot motors/fuses

If we switch to a 5 amp fuse, is it necessary to get the thermally protected motor cables? Will they help us substantially, or will the 5 amp fuse take care of the problem?
__________________
  #7   Spotlight this post!  
Unread 18-03-2011, 17:26
cgmv123's Avatar
cgmv123 cgmv123 is offline
FRC RI/FLL Field Manager
AKA: Max Vrany
FRC #1306 (BadgerBOTS)
Team Role: College Student
 
Join Date: Jan 2011
Rookie Year: 2011
Location: Madison, WI
Posts: 2,085
cgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond reputecgmv123 has a reputation beyond repute
Re: Minibot motors/fuses

We had both 3 and 5 amps available. We swapped them out and they both worked. We didn't put 2 fuses in at once.
__________________
BadgerBOTS Robotics|@team1306|Facebook: BadgerBOTS
2016 FIRST Championship Tesla Division | 2016 Wisconsin Regional Engineering Inspiration Award

2015 FIRST Championship Carson Division | 2015 Wisconsin Regional Chairman's Award

2013 FIRST Championship Curie Division | 2013 Wisconsin Regional Chairman's Award

2012 FIRST Championship Archimedes Division | 2012 Wisconsin Regional Engineering Inspiration Award, Woodie Flowers Finalist Award (Lead Mentor Ben Senson)

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 00:05.

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