R/C Tech Forums

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

Thread Tools Search this Thread
Old 01-12-2006, 10:24 AM   #1
Tech Adept
Join Date: Sep 2005
Posts: 111
Default COMMS

how often do i need to cut my comm i heard after 2 battery packs the reason im asking is that after i had a race day i had to take a big chunk off my com to get it looking good . AND BEFORE EVERYONE BLASTS ME ABOUT DOING A SEARCH YES I DID AND NO I CANT FIND ANYTHING REGARDING WHAT I NEED TO KNOW THANKS GUYS
serpentrush is offline   Reply With Quote
Old 01-12-2006, 11:05 AM   #2
Tech Regular
Join Date: Aug 2004
Location: Lost in CA
Posts: 464
Trader Rating: 22 (100%+)
Send a message via AIM to 5thscaleracer

you can cut the comm every run it all depends on the brush that you are running and how bad the old brushes look.

i skim the comm very lightly inbetween runs using the same brush and breaking it in on a 3V battery b4 i actually go out and start hacking.

But i say 5 runs on avg before you need to do any cutting.
5thscaleracer is offline   Reply With Quote
Old 01-12-2006, 11:12 AM   #3
Tech Adept
Join Date: Sep 2005
Posts: 111

serpentrush is offline   Reply With Quote
Old 01-12-2006, 01:15 PM   #4
Tech Elite
Join Date: Oct 2003
Location: Green Bay,WI
Posts: 3,006
Trader Rating: 1 (100%+)
Send a message via AIM to R/C Anonymous

i cut my comm about every 25 runs...thats when i have noticed a small lack of power out of my car (.2-.3 tenths a lap average) that is when i used Putnam green/blue combo on the Monster stock motors

when i ran "F" brushes and had to recutand put new brushes on more often...about every 6 runs till i seen a loss in performance

every brush is different as to when it seems to lose its edge, and many drivers will have different opinions on when its time to rebuild a motor...i dont feel its necessary to di it as often as alot of people do it for CLUB racing...at a national level a little more often might be necessary
Geoff C.
R/C Anonymous is offline   Reply With Quote
Old 01-12-2006, 01:35 PM   #5
Tech Master
AM03GT's Avatar
Join Date: Jan 2005
Location: Long Island
Posts: 1,007
Trader Rating: 13 (100%+)

practice 3-5 runs before a cut...

racing cut the comm every run...

brushes, run them down till they go bad... depending on the brush and whether or not they discolor from overheating...

this is what i do... cutting the comm often is not only good for performance, but lengthens the life of the motor.
Associated // Reedy // Radiopost // XP Digital // Parma PSE // Integy
AM03GT is offline   Reply With Quote
Old 01-12-2006, 01:42 PM   #6
Tech Elite
Jack2's Avatar
Join Date: Nov 2004
Location: Australia
Posts: 2,377
Trader Rating: 1 (100%+)

It depends on the teardown of the motor too. A 8x1 Ti is going to wear differently to a 8x1 CP. My Ti's are 1 run and cut motors. With a CP, this is not the case. Then it will come down to how you tune and gear the motor.

If you have the equipment, then do it as often as possible.
Schumacher Mi4CX
Mugen MTX & MRX

"He who dies with the most toys wins" - Phil Harris
Jack2 is offline   Reply With Quote
Old 01-12-2006, 01:48 PM   #7
Tech Adept
Join Date: Sep 2005
Posts: 111

thanks a mill guys for all the info so i will cut every 2 to 3 runs that should be ok
serpentrush is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
MOTOR COMMS 16skyline Electric On-Road 75 05-05-2007 07:02 PM
Cutting comms Still Bill Electric On-Road 16 07-08-2006 11:32 PM
I keep cremating my comms! Timmy_G Electric On-Road 34 01-23-2005 02:27 AM
new motors and their comms onnetz Electric On-Road 18 08-28-2004 12:23 PM
Reedy Big Comms, how low can you go'? Cain Electric On-Road 2 03-09-2004 10:19 AM

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 04:57 PM.

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

SEO by vBSEO 3.5.0