R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 09-21-2010, 05:26 PM   #17071
Tech Regular
 
casino57's Avatar
 
Join Date: Jun 2006
Location: Sandwich,Il.
Posts: 498
Default

1100 pages and I don't have the time to look ...so I have a question that may have already been addressed. I ran my Tekin RS for the first time over the weekend....I noticed after I got put into a board that the car slowed. Not really sure how much in the infield but the straightaway speed was noticably slower. After a few more laps it came back. I was running a new 17.5 motor and a new lipo battery. Any ideas?
__________________
Mike Garcia - RCAmerica - XRay T3
Trinity - JDR - Hudy - KoPropo America
Laser Products - Tekin
Leisure Hours Raceway & Hobby Shop
casino57 is offline   Reply With Quote
Old 09-21-2010, 05:30 PM   #17072
Tech Champion
 
Krio's Avatar
 
Join Date: Mar 2008
Location: At dirt tracks in Michigan!
Posts: 5,103
Trader Rating: 150 (99%+)
Default

Quote:
Originally Posted by casino57 View Post
1100 pages and I don't have the time to look ...so I have a question that may have already been addressed. I ran my Tekin RS for the first time over the weekend....I noticed after I got put into a board that the car slowed. Not really sure how much in the infield but the straightaway speed was noticably slower. After a few more laps it came back. I was running a new 17.5 motor and a new lipo battery. Any ideas?
Sounds like you possibly tripped to sensorless... Do the led readings for the sensors still cycle through as you spin the motor by hand?
__________________
www.kriostasis.com
Krio is offline   Reply With Quote
Old 09-21-2010, 05:36 PM   #17073
Tech Champion
 
STLNLST's Avatar
 
Join Date: Sep 2001
Location: Sacramento
Posts: 8,999
Trader Rating: 21 (100%+)
Default

Quote:
Originally Posted by Bubblehead View Post
Should I be adding timing to my motor? I have the timing at 0.
Depends on your RS settings. I personally don't like the feel of the motor when at 0. I have run anywhere from 4-12 degrees of motor timing. This is with a Tekin redline 17.5 Motor feels great and the temps haven't been higher than 160.
STLNLST is offline   Reply With Quote
Old 09-21-2010, 05:50 PM   #17074
Team Tekin
 
Randy_Pike's Avatar
 
Join Date: Nov 2007
Location: Norcal
Posts: 9,702
Trader Rating: 6 (100%+)
Send a message via Yahoo to Randy_Pike
Default

Quote:
Originally Posted by casino57 View Post
1100 pages and I don't have the time to look ...so I have a question that may have already been addressed. I ran my Tekin RS for the first time over the weekend....I noticed after I got put into a board that the car slowed. Not really sure how much in the infield but the straightaway speed was noticably slower. After a few more laps it came back. I was running a new 17.5 motor and a new lipo battery. Any ideas?
You lost your sensors at some point. We will try to get them back during decceleration and go back to sensored only mode if we can. Check your sensors as was suggested using the RS's sensor checker feature.
__________________
"Things may come to those who wait, but only the things left by those who hustle." Abraham Lincoln

Tekin,Protek,A-Main Hobbies,JConcepts,Avid RC,Yokomo,MIP,SikLidz,FactoryRC, www.randypikerc.com
Randy_Pike is offline   Reply With Quote
Old 09-21-2010, 06:30 PM   #17075
Tech Elite
 
andrewdoherty's Avatar
 
Join Date: Jan 2005
Location: ★Wylie, TX★
Posts: 3,776
Trader Rating: 47 (100%+)
Default

Quote:
Originally Posted by casino57 View Post
1100 pages and I don't have the time to look ...so I have a question that may have already been addressed. I ran my Tekin RS for the first time over the weekend....I noticed after I got put into a board that the car slowed. Not really sure how much in the infield but the straightaway speed was noticably slower. After a few more laps it came back. I was running a new 17.5 motor and a new lipo battery. Any ideas?
It won't fix the problem, but if it happens again this will keep your speed up a little better. Set your timing advance to 100% if you're running sensored only. THis way you will at least have some timing if the sensor falls out again.
__________________
"Whether you think you can, or think you can't, you're right." -Henry Ford
"[Driving] Genius is 1% inspiration, and 99% perspiration" -T.A. Edison
|◤Hobbywing◢|◤SpeedzoneUSA.com◢|◤Pro-One◢|
|◤ReflexRacing.net◢|◤Protoform◢|◤AVID R/C◢|
andrewdoherty is offline   Reply With Quote
Old 09-21-2010, 06:43 PM   #17076
Tech Elite
 
artwork's Avatar
 
Join Date: Sep 2004
Location: Thornton, CO
Posts: 3,112
Trader Rating: 62 (100%+)
Default

Quote:
Originally Posted by Randy_Pike View Post
You lost your sensors at some point. We will try to get them back during decceleration and go back to sensored only mode if we can. Check your sensors as was suggested using the RS's sensor checker feature.
I used this exact method to diagnose a fellow racer's motor this weekend. I turned the rotor by hand and was able to show that not all of the hall sensors were firing. He put in another motor and the problem went away. I was able to point out the problem in about 20 seconds using the first three lights on the Tekin RS. Great feature!
__________________
Sanwa | R1 Wurks | Avid | 2mm Designs
artwork is offline   Reply With Quote
Old 09-21-2010, 07:16 PM   #17077
Tech Elite
 
Join Date: Nov 2009
Location: Woodinville, WA
Posts: 2,512
Trader Rating: 8 (100%+)
Default

I've got a couple setup questions.

1) Redline 17.5 motor, no-timing class. Very tight indoor carpet track, lots of grip in the groove, not so much outside the groove. I initially tried a setup closer to what worked at a wider (but still relatively tight) outdoor track... 3.7 FDR and about 5 timing on the motor. Outdoors I found the car just didn't have enough top speed if the FDR was in the 4's, and I had to drop the timing way down to get temps under control. It felt a bit sluggish out of corners, so I left the timing and bumped the FDR up to 3.9. It felt better, if perhaps a bit sluggish at the end of the straight and through the sweeper (I didn't have to lift at all for the sweeper if I took a nice smooth line). Motor temps are around 140-150*F. The fast guy in class was running an LRP with normal insert and a 4.4 FDR (not sure if he dropped it later in the night). Would it be worth experimenting with a higher FDR and more motor timing, or do you think I'm in the ballpark?

2) I'm setting up a car for 25.5 no-timing, using the Novak Ballistic 25.5. Given the number of problems I've seen on here and in person using Ballistics with Tekins, I'm a bit apprehensive. Novak's site suggests a 3.5 FDR for the motor with "0" on the motor (not retarded, not advanced), but that seems like a good way to burn it up in a hurry if for some reason it's not cooperating with the Tekin. Any have any specific experience with this setup?

-Mike
grippgoat is offline   Reply With Quote
Old 09-21-2010, 07:28 PM   #17078
Regional Moderator
 
CarbonJoe's Avatar
 
Join Date: Jul 2006
Posts: 2,661
Default

Quote:
Originally Posted by grippgoat View Post
2) I'm setting up a car for 25.5 no-timing, using the Novak Ballistic 25.5. Given the number of problems I've seen on here and in person using Ballistics with Tekins, I'm a bit apprehensive. Novak's site suggests a 3.5 FDR for the motor with "0" on the motor (not retarded, not advanced), but that seems like a good way to burn it up in a hurry if for some reason it's not cooperating with the Tekin. Any have any specific experience with this setup?
I've been running VTA with virtually the same setup (Ballistic 25.5), except 3.6 FDR and timing on the motor halfway between N (30 degrees) and max timing. Works great, temps around 145 degrees. 90x40 carpet track, Sportsman Spec throttle profile. I do have a 3Racing fan/heatsink combo on it, however.
__________________
*** The Gate - Celebrating 8 years at the same location ***
The difference between genius and stupidity is that genius has its limits. - Albert Einstein
Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car
CarbonJoe is offline   Reply With Quote
Old 09-21-2010, 07:35 PM   #17079
Tech Addict
 
Bubblehead's Avatar
 
Join Date: Jan 2008
Location: Portsmouth, VA
Posts: 708
Default

Quote:
Originally Posted by STLNLST View Post
Depends on your RS settings. I personally don't like the feel of the motor when at 0. I have run anywhere from 4-12 degrees of motor timing. This is with a Tekin redline 17.5 Motor feels great and the temps haven't been higher than 160.
Should I remove that amount of timing from my RS settings? I matched the FDR of most of the racers at the track, my RS settings are about the same and my car is much slower the only difference is Tekin 17.5.
Bubblehead is offline   Reply With Quote
Old 09-21-2010, 07:36 PM   #17080
Tech Elite
 
hairy's Avatar
 
Join Date: Apr 2008
Location: In the Good ole' U.S.A.
Posts: 2,323
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by andrewdoherty View Post
It won't fix the problem, but if it happens again this will keep your speed up a little better. Set your timing advance to 100% if you're running sensored only. THis way you will at least have some timing if the sensor falls out again.
Can you explain to an old guy what you mean by "hall sensors" and how you checked it with lights on board. I am new to this and have been having the same drop off in power on my 13.5 X-12.
__________________
MERLIN RACING
"He once ran a marathon because it was on his way"
Logic is a lost art!
You are defined in life by how you respond to defeat!
hairy is offline   Reply With Quote
Old 09-21-2010, 07:40 PM   #17081
Regional Moderator
 
CarbonJoe's Avatar
 
Join Date: Jul 2006
Posts: 2,661
Default

Quote:
Originally Posted by hairy View Post
Can you explain to an old guy what you mean by "hall sensors" and how you checked it with lights on board. I am new to this and have been having the same drop off in power on my 13.5 X-12.
With the ESC on, turn the motor by hand. LEDs 5, 6, and 7 will come on dimly in sequence as the signal from each pole's sensor "reads" the rotor magnet. If you don't see them keep illuminating as you continue turning the motor by hand, then either the ESC, sensor board, or sensor wire is bad.
__________________
*** The Gate - Celebrating 8 years at the same location ***
The difference between genius and stupidity is that genius has its limits. - Albert Einstein
Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car

Last edited by CarbonJoe; 09-22-2010 at 10:27 AM. Reason: corrected LED numbers...
CarbonJoe is offline   Reply With Quote
Old 09-21-2010, 10:37 PM   #17082
Tech Regular
 
xray09ACT's Avatar
 
Join Date: Aug 2009
Posts: 280
Trader Rating: 7 (100%+)
Default

Quote:
Originally Posted by eded1 View Post
What car and how many turns your orion has?
T3, 17.5
__________________
ACE Hobby Australia | Monaro models
TEAM Associated TC6 | LRP | LRP
TEAM Associated TC6 | Nosram | Nosram
TEAM Associated 12R5.1 | LRP | LRP
xray09ACT is offline   Reply With Quote
Old 09-22-2010, 12:52 AM   #17083
Tech Elite
 
hairy's Avatar
 
Join Date: Apr 2008
Location: In the Good ole' U.S.A.
Posts: 2,323
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by CarbonJoe View Post
With the ESC on, turn the motor by hand. LEDs 1, 2, and 3 will come on dimly in sequence as the signal from each pole's sensor "reads" the rotor magnet. If you don't see them keep illuminating as you continue turning the motor by hand, then either the ESC, sensor board, or sensor wire is bad.
awesome thank you!
__________________
MERLIN RACING
"He once ran a marathon because it was on his way"
Logic is a lost art!
You are defined in life by how you respond to defeat!
hairy is offline   Reply With Quote
Old 09-22-2010, 09:48 AM   #17084
Team Tekin
 
Randy_Pike's Avatar
 
Join Date: Nov 2007
Location: Norcal
Posts: 9,702
Trader Rating: 6 (100%+)
Send a message via Yahoo to Randy_Pike
Default

IT's actually led's 5 6 7 that will dimmly cycle on/off. This is a feedback of the sensors in the motor. ALL 3 must cycle on/off or the motor has a bad sensor board. Also note that a bad sensor harness will also cause this so swap it out first as it's the cheapest and easiest to do.
__________________
"Things may come to those who wait, but only the things left by those who hustle." Abraham Lincoln

Tekin,Protek,A-Main Hobbies,JConcepts,Avid RC,Yokomo,MIP,SikLidz,FactoryRC, www.randypikerc.com
Randy_Pike is offline   Reply With Quote
Old 09-22-2010, 10:06 AM   #17085
Tech Adept
 
Join Date: Sep 2009
Location: Barbados
Posts: 214
Default

Quote:
Originally Posted by casino57 View Post
1100 pages and I don't have the time to look ...so I have a question that may have already been addressed. I ran my Tekin RS for the first time over the weekend....I noticed after I got put into a board that the car slowed. Not really sure how much in the infield but the straightaway speed was noticably slower. After a few more laps it came back. I was running a new 17.5 motor and a new lipo battery. Any ideas?
Depending on your motor brand your sensor cable may come out in a big crash. I've taken to zip tieing my sensor cable to one of the motor cables to stop it coming out in a crash on my Redline motor after I went through a frustrating series of races where I eventually noticed that my sensor cable was pulling out ever so slightly due to crashes.
spongerX is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tekin Redline RS Sensored ESC and motors, opinions for offroad? Cain Electric Off-Road 4230 06-07-2015 04:38 PM
Sensored vs. Sensorless lemansracer Electric On-Road 71 02-14-2009 03:19 AM
New Tekin Redline Sensored Motors are Roar Legal! Randy_Pike Electric On-Road 3 08-05-2008 02:08 AM
Tekin Redline Sensored 10.5 HUCKMAN Electric On-Road 6 07-15-2008 08:50 PM
sensored vs sensorless bprocket Rookie Zone 5 05-16-2008 09:38 AM


Tags
v203, vegas 2.0


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 04:35 AM.


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