R/C Tech Forums

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

Closed Thread
 
Thread Tools Search this Thread
Old 06-21-2004, 06:14 PM   #91
Tech Addict
 
Intelligentsia's Avatar
 
Join Date: Jan 2003
Location: San Diego
Posts: 570
Default

ajg my buddy

If your brushes have come in contact with your comm and that comm has been rotated at length against the brushes, there is no way that it will appear as new. If you want to keep your motors running up to par you MUST cut the commutator and replace the brushes.
Intelligentsia is offline  
Old 06-21-2004, 06:15 PM   #92
ajg
Registered User
 
ajg's Avatar
 
Join Date: Jul 2003
Location: albuquerque nm
Posts: 924
Default

My lhs said they were ok, and they know what they're talking about.
ajg is offline  
Old 06-21-2004, 06:16 PM   #93
ajg
Registered User
 
ajg's Avatar
 
Join Date: Jul 2003
Location: albuquerque nm
Posts: 924
Default

I'll make a new video when i get the new front diff. It shipped today, but I don't know what method he shipped it.
ajg is offline  
Old 06-21-2004, 06:20 PM   #94
Tech Addict
 
Intelligentsia's Avatar
 
Join Date: Jan 2003
Location: San Diego
Posts: 570
Default

Obviously they don't know what they were talking about if after many runs on a 10 turn mod motor they tell you that you do not need to skim your comm or replace your brushes.
Intelligentsia is offline  
Old 06-21-2004, 06:20 PM   #95
ajg
Registered User
 
ajg's Avatar
 
Join Date: Jul 2003
Location: albuquerque nm
Posts: 924
Default

Also, I did say it had a bunch of runs on it, but all those runs were under 2 minutes, some less then a minute, and some only a few seconds. (bad battery pack, but I have a new one now).
ajg is offline  
Old 06-21-2004, 06:22 PM   #96
ajg
Registered User
 
ajg's Avatar
 
Join Date: Jul 2003
Location: albuquerque nm
Posts: 924
Default

The manual that comes with the motor says, to cut the comm and replace the brushes every 20 to 30 runs (for bashing, for racing it's every few times). About 10 of my runs is about as long as one run for a 1/10 scale car, which the motor is mostly made for.
ajg is offline  
Old 06-21-2004, 06:24 PM   #97
Regional Moderator
R/C Tech Charter Subscriber
 
Join Date: Dec 2002
Location: LaGrange, GA
Posts: 186
Default

just out of curiosity, did you use a hand held stopwatch to get the time between the cones?


if so, the gage R&R of your measurement would be awful. No human has a reaction time low enough to get a good reading. You need to increase the distance to approximately 60' to get any kind of accurate reading.

Not saying your car isn't fast, just that if you want to record as accurate a reading as possible by hand, you need to increase the sample time.
petzl is offline  
Old 06-21-2004, 06:27 PM   #98
ajg
Registered User
 
ajg's Avatar
 
Join Date: Jul 2003
Location: albuquerque nm
Posts: 924
Default

I timed it probably close to 50 times at 10 and 20 feet with an average of .07, if I remember correctly, and I can get down to .04 seconds with my reflexes. I'll try 50' to 60' when I get my new front diff.
ajg is offline  
Old 06-21-2004, 06:28 PM   #99
Tech Master
 
Join Date: Nov 2003
Location: Florida
Posts: 1,154
Trader Rating: 1 (100%+)
Default

It's not the color that is the deciding factor, it's the shape of the comm... and wear is not always easy to detect with the human eye.....Trust me it's worn...it's unavoidable given the RPM a ten turn is capable of, especially over the course of many runs as you said are on it......cut it, put new brushes,properly seat them in...and see if its not twice as fast as it is now......then put it on a dyno to find out the rpm it pulls and then re-calculate your figures.....what im getting at is you cant factor in how many rpm's your motor pulled when it was new....or for that matter trust the little printout it came with......it changes constantly
__________________
1/8 Scale: Tekno EB-48.2... Tekin RX-8 GEN-2 W/2050kv... Airtronix M11-X Radio... HiTec HS-7954SH Servo...

1/10 Scale: Associated B-5(rear motor)...Tekin RSX Gen-2 W/8.5t... Savox SC-1258-TG Servo
Joe B is offline  
Old 06-21-2004, 06:29 PM   #100
ajg
Registered User
 
ajg's Avatar
 
Join Date: Jul 2003
Location: albuquerque nm
Posts: 924
Default

I'll do that just for you guys, when I get my new diff.
ajg is offline  
Old 06-21-2004, 06:32 PM   #101
Tech Master
 
Join Date: Nov 2003
Location: Florida
Posts: 1,154
Trader Rating: 1 (100%+)
Default

PS dont have your hobby shop do it
__________________
1/8 Scale: Tekno EB-48.2... Tekin RX-8 GEN-2 W/2050kv... Airtronix M11-X Radio... HiTec HS-7954SH Servo...

1/10 Scale: Associated B-5(rear motor)...Tekin RSX Gen-2 W/8.5t... Savox SC-1258-TG Servo
Joe B is offline  
Old 06-21-2004, 06:34 PM   #102
ajg
Registered User
 
ajg's Avatar
 
Join Date: Jul 2003
Location: albuquerque nm
Posts: 924
Default

They can do it better than anyone else in town. It's part of their job.

Last edited by ajg; 06-21-2004 at 06:52 PM.
ajg is offline  
Old 06-21-2004, 06:41 PM   #103
ajg
Registered User
 
ajg's Avatar
 
Join Date: Jul 2003
Location: albuquerque nm
Posts: 924
Default

Question: Should I adjust the timing? I have it a 20 degrees now.
ajg is offline  
Old 06-21-2004, 08:03 PM   #104
Tech Adept
 
Join Date: Aug 2003
Posts: 220
Default

Its still 68 MPH of junk!!!!
Smalls is offline  
Old 06-22-2004, 03:17 AM   #105
Tech Master
 
Join Date: Nov 2003
Location: Florida
Posts: 1,154
Trader Rating: 1 (100%+)
Default

We'll since it's part of their job they must be good at it .....on the timing , since your going for top end and it's a light car, try to go up a few degrees at a time until it slows down........Not sure what brushes and springs your running but try to run the highest silver content brushes you can get your hands on.....
__________________
1/8 Scale: Tekno EB-48.2... Tekin RX-8 GEN-2 W/2050kv... Airtronix M11-X Radio... HiTec HS-7954SH Servo...

1/10 Scale: Associated B-5(rear motor)...Tekin RSX Gen-2 W/8.5t... Savox SC-1258-TG Servo
Joe B is offline  
Closed Thread

Similar Threads
Thread Thread Starter Forum Replies Last Post
downsizing! (micro-t, alum micro desert, fx10, t-spec) superhornetrace R/C Items: For Sale/Trade 20 06-20-2008 10:14 PM
FS: LRP Quantum Micro (w/ reverse) and Team Orion Micro Big Block WeatherB R/C Items: For Sale/Trade 1 06-26-2005 10:19 AM
selling kinwald xxx,team B3, custom hpi micro and 540 hybrid micro conversion, cheap romster R/C Items: For Sale/Trade 15 09-18-2003 04:32 PM
Team Orion Micro Elite Modified Motor for Micro RS4 Supra66 R/C Items: For Sale/Trade 1 12-02-2002 05:43 PM
MICRO RS4, MICRO RS4 HOPUPS, XXXS PARTS, INTEGY 16x5, MOTORS, TIRES HarshGuy R/C Items: For Sale/Trade 0 03-10-2002 10:06 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 02:43 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