R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric Off-Road

Reply
 
Thread Tools Search this Thread
Old 10-02-2007, 08:07 AM   #1
Tech Champion
 
MADMAN23's Avatar
 
Join Date: Nov 2005
Location: waddington ny
Posts: 6,359
Trader Rating: 27 (97%+)
Send a message via AIM to MADMAN23
Default need help on timing on eletric motor's

i have a epic 19 turn motor... my brushe's have half there .. and they won't work so i put new 1 on it it work like new... what the probelm? and should i more the timing thing on the motor? if so - or + and how much?
__________________
catch me if you can....

WWW.RCFANATICS.NET
http://rcraracing.com/sitebuilder/images/FORUM/index.php


C&D R/C RACEWAY
Team Wicked Racing
MADMAN23 is offline   Reply With Quote
Old 10-02-2007, 08:22 AM   #2
Tech Apprentice
 
Join Date: Oct 2007
Posts: 65
Trader Rating: 14 (100%+)
Send a message via AIM to dalejrfan88
Default

Are you sure the brushes were making contact on the comm?
dalejrfan88 is offline   Reply With Quote
Old 10-02-2007, 08:31 AM   #3
Tech Champion
 
MADMAN23's Avatar
 
Join Date: Nov 2005
Location: waddington ny
Posts: 6,359
Trader Rating: 27 (97%+)
Send a message via AIM to MADMAN23
Default

Quote:
Originally Posted by dalejrfan88 View Post
Are you sure the brushes were making contact on the comm?
yes
__________________
catch me if you can....

WWW.RCFANATICS.NET
http://rcraracing.com/sitebuilder/images/FORUM/index.php


C&D R/C RACEWAY
Team Wicked Racing
MADMAN23 is offline   Reply With Quote
Old 10-02-2007, 08:47 AM   #4
Tech Champion
 
MikeXray's Avatar
 
Join Date: Oct 2006
Location: New York
Posts: 5,749
Trader Rating: 73 (100%+)
Default

First are you sure you can adjust your timing? most 19t are fixed timing endbells, although there are some that you can adjust. Changing timing is not going to help a contact problem, an electric motor is a simple device. If it's not moving there isn't enough current to overcome the magnetic field of the can, so even if it's making contact it's not making enough, or something is preventing the power from getting from the lead to the comm. Try using a section of a dead brush (with the shunt removed) and put it behind your brush and the spring, this will give more tension to the brush and allow you to run it smaller. Some brush hoods also are not slotted enough on the spring side to allow the spring to push on the brush past a certain point.
__________________
Mike L. Awesomatixusa.com | TQWire.com | Islandraceway.com |JacksonRCracing.com | Horsham RC | Sweepracingusa.com
MikeXray is offline   Reply With Quote
Old 10-02-2007, 11:53 AM   #5
Tech Champion
 
MADMAN23's Avatar
 
Join Date: Nov 2005
Location: waddington ny
Posts: 6,359
Trader Rating: 27 (97%+)
Send a message via AIM to MADMAN23
Default

yes i can adjust the timing....what is a shunt? thank's for your help...
__________________
catch me if you can....

WWW.RCFANATICS.NET
http://rcraracing.com/sitebuilder/images/FORUM/index.php


C&D R/C RACEWAY
Team Wicked Racing
MADMAN23 is offline   Reply With Quote
Old 10-02-2007, 12:30 PM   #6
Tech Champion
 
MADMAN23's Avatar
 
Join Date: Nov 2005
Location: waddington ny
Posts: 6,359
Trader Rating: 27 (97%+)
Send a message via AIM to MADMAN23
Default

here the motor.. http://www2.towerhobbies.com/cgi-bin...EXL1&P=ML#tech
__________________
catch me if you can....

WWW.RCFANATICS.NET
http://rcraracing.com/sitebuilder/images/FORUM/index.php


C&D R/C RACEWAY
Team Wicked Racing
MADMAN23 is offline   Reply With Quote
Old 10-02-2007, 12:47 PM   #7
Tech Elite
 
POUNDITRACING's Avatar
 
Join Date: Dec 2005
Location: Newport, RI
Posts: 3,063
Trader Rating: 10 (100%+)
Default

you can see the timing from the picture
__________________
Pound It Paints - http://www.rctech.net/forum/painting-designs-graphics-photography/270707-pound-paints-raymond-ramirez.html
RC Reveled - http://www.teamrcr.net
POUNDITRACING is offline   Reply With Quote
Old 10-02-2007, 01:18 PM   #8
Tech Master
 
RC Dad's Avatar
 
Join Date: Jun 2007
Location: Bismarck
Posts: 1,355
Trader Rating: 26 (100%+)
Send a message via MSN to RC Dad
Default

24 degrees is standard timing for stock motors but I usually set 19t or mods between 12 and 15 degrees advanced. Any more than that gets the motor hot too quickly and performance degrades when the brushes burn. You can tell if its too hot because the brushes turn blue and get brittle. They'll chip or chunk apart. They also scrape the comm badly at that point because the lubricant is burnt out of them.
RC Dad is offline   Reply With Quote
Old 10-02-2007, 01:18 PM   #9
Tech Master
 
RC Dad's Avatar
 
Join Date: Jun 2007
Location: Bismarck
Posts: 1,355
Trader Rating: 26 (100%+)
Send a message via MSN to RC Dad
Default

I agree with Xray, there's probably not enough brush left for the spring to push against the comm. the slots in the side where the spring goes through aren't always cut all the way so the spring hits the stop when the brush is 1/2 gone. For bashing you can maybe get by with 1/2 brush but for racing I throw the brushes away when 25% is worn off so the spring pressure is consistent. The brush positive almost always wears faster than the negative.
RC Dad is offline   Reply With Quote
Old 10-03-2007, 06:49 AM   #10
Tech Champion
 
MADMAN23's Avatar
 
Join Date: Nov 2005
Location: waddington ny
Posts: 6,359
Trader Rating: 27 (97%+)
Send a message via AIM to MADMAN23
Default

Quote:
Originally Posted by POUNDITRACING View Post
you can see the timing from the picture
yea but that stock seting... ..
__________________
catch me if you can....

WWW.RCFANATICS.NET
http://rcraracing.com/sitebuilder/images/FORUM/index.php


C&D R/C RACEWAY
Team Wicked Racing
MADMAN23 is offline   Reply With Quote
Old 10-03-2007, 06:50 AM   #11
Tech Champion
 
MADMAN23's Avatar
 
Join Date: Nov 2005
Location: waddington ny
Posts: 6,359
Trader Rating: 27 (97%+)
Send a message via AIM to MADMAN23
Default

Quote:
Originally Posted by RC Dad View Post
24 degrees is standard timing for stock motors but I usually set 19t or mods between 12 and 15 degrees advanced. Any more than that gets the motor hot too quickly and performance degrades when the brushes burn. You can tell if its too hot because the brushes turn blue and get brittle. They'll chip or chunk apart. They also scrape the comm badly at that point because the lubricant is burnt out of them.
i will set it to 12 degree to start with.... how do you know when it is set right?
__________________
catch me if you can....

WWW.RCFANATICS.NET
http://rcraracing.com/sitebuilder/images/FORUM/index.php


C&D R/C RACEWAY
Team Wicked Racing
MADMAN23 is offline   Reply With Quote
Old 10-03-2007, 06:51 AM   #12
Tech Champion
 
MADMAN23's Avatar
 
Join Date: Nov 2005
Location: waddington ny
Posts: 6,359
Trader Rating: 27 (97%+)
Send a message via AIM to MADMAN23
Default

Quote:
Originally Posted by RC Dad View Post
I agree with Xray, there's probably not enough brush left for the spring to push against the comm. the slots in the side where the spring goes through aren't always cut all the way so the spring hits the stop when the brush is 1/2 gone. For bashing you can maybe get by with 1/2 brush but for racing I throw the brushes away when 25% is worn off so the spring pressure is consistent. The brush positive almost always wears faster than the negative.
should i slot it so i can get more out of it?
__________________
catch me if you can....

WWW.RCFANATICS.NET
http://rcraracing.com/sitebuilder/images/FORUM/index.php


C&D R/C RACEWAY
Team Wicked Racing
MADMAN23 is offline   Reply With Quote
Old 10-03-2007, 12:13 PM   #13
Tech Elite
 
POUNDITRACING's Avatar
 
Join Date: Dec 2005
Location: Newport, RI
Posts: 3,063
Trader Rating: 10 (100%+)
Default

most 19t motors are around 12-15*. Don't think about it to much. If after your run the motor is cool and the gearing is correct then I would advance it a little but not worth it.
__________________
Pound It Paints - http://www.rctech.net/forum/painting-designs-graphics-photography/270707-pound-paints-raymond-ramirez.html
RC Reveled - http://www.teamrcr.net
POUNDITRACING is offline   Reply With Quote
Old 10-04-2007, 06:02 AM   #14
Tech Champion
 
MADMAN23's Avatar
 
Join Date: Nov 2005
Location: waddington ny
Posts: 6,359
Trader Rating: 27 (97%+)
Send a message via AIM to MADMAN23
Default

Quote:
Originally Posted by POUNDITRACING View Post
most 19t motors are around 12-15*. Don't think about it to much. If after your run the motor is cool and the gearing is correct then I would advance it a little but not worth it.
it is not runing cool... i tryed it last night at 24 dave g told me to run it at that... it it look slower then it was... so today right now im chargeing the battery pack at going to run it at like you said 12....
__________________
catch me if you can....

WWW.RCFANATICS.NET
http://rcraracing.com/sitebuilder/images/FORUM/index.php


C&D R/C RACEWAY
Team Wicked Racing
MADMAN23 is offline   Reply With Quote
Old 11-02-2007, 09:59 AM   #15
Tech Master
 
RC Dad's Avatar
 
Join Date: Jun 2007
Location: Bismarck
Posts: 1,355
Trader Rating: 26 (100%+)
Send a message via MSN to RC Dad
Default

Quote:
Originally Posted by MADMAN23 View Post
should i slot it so i can get more out of it?
I wouldn't. The stop is there for a reason - once the brush gets too short it will squirm in the brush hood and misalign itself or even hang up. Brushes are cheap - replace them often.
RC Dad is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Difference b/tween ESC timing and timing on motor? Loverc Electric On-Road 8 04-11-2008 05:45 PM
FS:Motors,Motor's and More Motor's...Batteries TOO..... TexRacer R/C Items: For Sale/Trade 9 04-04-2006 11:47 PM
old eletric stuff mxbaker427 R/C Items: For Sale/Trade 36 11-25-2005 10:29 AM
Wanted A Usa-1 Eletric rcmarloo R/C Items: Wanted to Buy 0 01-04-2004 06:19 PM
New HPI eletric kit buggyman81 Electric On-Road 5 04-06-2003 06:06 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 06:12 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net