R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 01-13-2005, 08:07 AM   #1
Tech Rookie
 
IceCreamMan's Avatar
 
Join Date: Jan 2005
Location: Indianapolis
Posts: 13
Default Motor tuning and battery matching

These are two things that I have some questions about. I noticed a tool for motors that looked like a small maching tool to use on electric motors. It looked like it was being used for some onroad cars. Is this something normally done for offroad electrics too? What exactly does this do for performance of the motor?

The next thing is building your own batteries using matched cells. What is the nature of cell "matching", and what specs are used to measure the output of these batteries under a load? Are packs being build out of nickle metal hydride batts. now ?

Thanks again.
IceCreamMan is offline   Reply With Quote
Old 01-13-2005, 08:12 AM   #2
Tech Rookie
 
IceCreamMan's Avatar
 
Join Date: Jan 2005
Location: Indianapolis
Posts: 13
Default

I had to double check. It was a comm lathe. I know what a lathe is, and what the comms. on a motor are, but what do you gain from this?

Thanks
IceCreamMan is offline   Reply With Quote
Old 01-13-2005, 11:46 AM   #3
Tech Master
 
Join Date: Jan 2004
Location: IN MY OWN HAPPY PLACE
Posts: 1,600
Send a message via AIM to Javen13 Send a message via Yahoo to Javen13
Default

as you run the car the brushes rub against the comm and cause it to wear down so the connection isnt that good. if you cut the motor it gets rid of the grove in the comm created by the brushes and there for a better connection is made
Javen13 is offline   Reply With Quote
Old 01-13-2005, 11:51 AM   #4
Tech Addict
 
Rysuleod's Avatar
 
Join Date: Sep 2004
Location: Dallas, Texas
Posts: 578
Trader Rating: 1 (100%+)
Default

The arching of the electricity and regular friction wears the comm down unevenly and cutting it restores the comm to like new condition. You get less electrical resistance between the brush and comm and therefore more power.

As far as recommendations on cutting the comm, some serious racers do it before every race. I am just a club racer and I only get my comm cut once every 2-3 weeks (8-12 runs) or so.
Rysuleod is offline   Reply With Quote
Old 01-17-2005, 08:44 AM   #5
Tech Initiate
 
Join Date: Dec 2004
Location: Southeast of Indy
Posts: 26
Send a message via AIM to glassman50
Post motor tuning

This site shows tuneup tips
http://www.motortuningsecrets.com/tunestockmotor.html
This one has some good ones too.
http://www.misbehavin-rc.com/pit-lane/ge-pit-lane.asp
Hope these help.
glassman50 is offline   Reply With Quote
Old 02-15-2005, 10:18 PM   #6
Tech Regular
 
skrivitz's Avatar
 
Join Date: Jan 2005
Location: Oconomowoc, WI
Posts: 361
Trader Rating: 1 (100%+)
Default

great sites
skrivitz is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
matching battery maximebeauvais Electric On-Road 33 11-18-2007 04:09 PM
Battery Matching Wasabi Electric On-Road 7 07-29-2006 01:12 AM
Battery re-matching CORALLY NUT Rookie Zone 2 03-07-2005 04:36 AM
Battery matching Mike01 Electric On-Road 0 02-15-2005 08:08 PM
battery matching gspot69d Electric On-Road 9 10-13-2004 04:26 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 02:57 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net