R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 06-15-2010, 10:52 PM   #15151
Tech Lord
 
syndr0me's Avatar
 
Join Date: Dec 2004
Location: 5280 Raceway
Posts: 13,140
Trader Rating: 32 (100%+)
Default

I solved SPX fade by putting a heat sink on it. Maybe try a fan on the Tekin's posts?
syndr0me is offline   Reply With Quote
Old 06-15-2010, 11:44 PM   #15152
Tech Elite
 
andrewdoherty's Avatar
 
Join Date: Jan 2005
Location: ★Wylie, TX★
Posts: 3,776
Trader Rating: 47 (100%+)
Default

Quote:
Originally Posted by InspGadgt View Post
Using the 2x ramp and the same gearing as the other RS users at the track...they don't have the same issue.
I ran into the same thing InspGadgt. I was running a 6.5 with very mild timing/turbo settings in an RS Pro on a track with a 250 ft straight. The car had great speed for the first few minutes, and then it would fall off quick. It was most noticeable on the straight. I think it was going into default mode and running un-sensored. I did the sensor wires check with the dim leds but they were always being read. I tried two motors and 4 sensor wires but none fixed the problem. I could pull into pit lane and have someone pick up my car to look at it and I was still getting full throttle to the esc (all the leds were flashing) but turbo never kicked in. If I turned it off and waited a minute or two and went back out it would do the same thing; good for a minute and then it would go back to default. Motor was about 160 after 6 minutes and the esc was only flashing 4 leds. The aggravating thing to me was it took so long to walk down the two flights of stairs an d around to pit lane that sometimes by then everything was back to working properly..lol It took me a while to realize what was happening.

No one else was running a Tekin at the race though. The other drivers were running SPX 8's with 4.5's
__________________
"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 06-16-2010, 01:10 AM   #15153
Tech Champion
 
Join Date: Nov 2001
Location: Hawaii, USA
Posts: 7,186
Default

So what did you do?
InspGadgt is offline   Reply With Quote
Old 06-16-2010, 01:26 AM   #15154
Tech Master
 
FREAKAH's Avatar
R/C Tech Elite Subscriber
 
Join Date: Jan 2002
Posts: 1,389
Default

Like syndrOme i'd say it's heat build-up in the esc. It would seem to correlate with the summer heat since people are having problems with fade just recently. Maybe put a fan to it just to see if it cures the fade? I would'nt hurt. I'm going to mount one up too cause I have been experiencing brake fade recently.
__________________
Second-Hand Racing
RACE WORLD HAWAII
Losi Type-R |Tamiya F104 PRO | Tamiya F103 | Mugen MTX-4R | AE FT GT2
FREAKAH is offline   Reply With Quote
Old 06-16-2010, 02:01 AM   #15155
Tech Elite
 
DaveW's Avatar
 
Join Date: Mar 2003
Location: Mobile, AL
Posts: 2,964
Trader Rating: 1 (100%+)
Default

In my case, im not so sure its heat build up or fade. As i stated before, the RS had one LED for temp, and my x12 17.5 was barely 160 degrees. That 40mm fan did very well at keeping the motor cool.

My settings are fairly conservative. 20 on timing, and 14 on turbo with a ramp of 1? I cant see the RS struggling with this. Not to mention, turbo worked if i revved it free air. If i dropped it on the track... no turbo. It worked fine all day long till the main. I even discharged the pack i ran in the main to see if i swapped in a partially charged battery. Nay. I barely used a 1/3 of the batteries capacity!

Im wondering if it has something to do with the software being flashed to the hardware. I mean, we all know the RS can be finicky when it comes to updating it, and making sure it stores changes. The speedo i had the problems with had to have the software rolled back to 198 and then to 203 before it would stop auto checking the 1s box.

I dunno, but i have my new RS and a freshly rebuilt 17.5 for this weekend. Hopefully the problem wont present itself again. With 3 weeks worth of turnaround, you lose A LOT of stick time.
__________________
...you better run like im booger flickin...
DaveW is offline   Reply With Quote
Old 06-16-2010, 04:49 AM   #15156
Tech Fanatic
 
Fast XXXS's Avatar
 
Join Date: Nov 2005
Location: Ballarat, VIC
Posts: 843
Trader Rating: 49 (100%+)
Default

Quote:
Originally Posted by andrewdoherty View Post
I ran into the same thing InspGadgt. I was running a 6.5 with very mild timing/turbo settings in an RS Pro on a track with a 250 ft straight. The car had great speed for the first few minutes, and then it would fall off quick. It was most noticeable on the straight. I think it was going into default mode and running un-sensored. I did the sensor wires check with the dim leds but they were always being read. I tried two motors and 4 sensor wires but none fixed the problem. I could pull into pit lane and have someone pick up my car to look at it and I was still getting full throttle to the esc (all the leds were flashing) but turbo never kicked in. If I turned it off and waited a minute or two and went back out it would do the same thing; good for a minute and then it would go back to default. Motor was about 160 after 6 minutes and the esc was only flashing 4 leds. The aggravating thing to me was it took so long to walk down the two flights of stairs an d around to pit lane that sometimes by then everything was back to working properly..lol It took me a while to realize what was happening.

No one else was running a Tekin at the race though. The other drivers were running SPX 8's with 4.5's
I had these problems but with a 17.5. The same as DaveW. I found it was from the signal fluctuating and the esc not picking up full throttle. I set the throttle highpoint (on my Helios) to 90, calibrated the esc then put it back to 100. Solved the problem. Now i calibrate my speedy everytime i change the settings to make sure this doesnt happen again.
Fast XXXS is offline   Reply With Quote
Old 06-16-2010, 06:58 AM   #15157
Tech Elite
 
M-Technic's Avatar
 
Join Date: Sep 2007
Location: Palm Beach, FL
Posts: 2,562
Trader Rating: 15 (100%+)
Default

I'd say the fade is because one of the following scenarios:

1) the ESC isn't seeing full throttle, as mentioned in the post above
2) the motor is getting hot and losing power. for some motors this can be at 160*!
3) the ESC may be getting too hot.
__________________
RCAmerica | Xray | Hudy | Radiopost | Speed Passion USA | Trinity | P3 Graphics
M-Technic is offline   Reply With Quote
Old 06-16-2010, 11:02 AM   #15158
Tech Adept
 
RTR canada's Avatar
 
Join Date: Dec 2008
Posts: 181
Default

does anyone know a good setting for 13.5 speed passion 3.0 motor?? and witch of the settings is for torque? Thanks
RTR canada is offline   Reply With Quote
Old 06-16-2010, 11:52 AM   #15159
Tech Champion
 
Join Date: Nov 2001
Location: Hawaii, USA
Posts: 7,186
Default

Quote:
Originally Posted by Fast XXXS View Post
I had these problems but with a 17.5. The same as DaveW. I found it was from the signal fluctuating and the esc not picking up full throttle. I set the throttle highpoint (on my Helios) to 90, calibrated the esc then put it back to 100. Solved the problem. Now i calibrate my speedy everytime i change the settings to make sure this doesnt happen again.
Did that...didn't fix it
InspGadgt is offline   Reply With Quote
Old 06-16-2010, 11:53 AM   #15160
Tech Champion
 
Join Date: Nov 2001
Location: Hawaii, USA
Posts: 7,186
Default

Quote:
Originally Posted by M-Technic View Post
I'd say the fade is because one of the following scenarios:

1) the ESC isn't seeing full throttle, as mentioned in the post above
2) the motor is getting hot and losing power. for some motors this can be at 160*!
3) the ESC may be getting too hot.
That's what I was thinking...already been through 1 and 2...and last race turned my ESC so the posts would get more air...that didn't seem to help either.
InspGadgt is offline   Reply With Quote
Old 06-16-2010, 12:08 PM   #15161
Tech Elite
 
DaveW's Avatar
 
Join Date: Mar 2003
Location: Mobile, AL
Posts: 2,964
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by Fast XXXS View Post
I had these problems but with a 17.5. The same as DaveW. I found it was from the signal fluctuating and the esc not picking up full throttle. I set the throttle highpoint (on my Helios) to 90, calibrated the esc then put it back to 100. Solved the problem. Now i calibrate my speedy everytime i change the settings to make sure this doesnt happen again.
To keep from confusion, i have borrowed two separate RS's since my RS was in for repair. The first borrowed RS gave me NO issues. Worked like a charm and made me instantly love the speedo. The second borrowed RS is the one that gave me the current issues...

Another local suggested the same thing after my run. He asked how i set my throttle/brake endpoints and i told him i set them both at 125% to calibrate the RS. Brake usually gets turned down to the low 80's during use. He suggested settings as you just did, but havent been back to the track yet to try them.

I used these settings because they are basically my 'defaults' for any speedo i have used over the years. It allows me to compare speedos based on previously known parameters. If i wanted to stay close to that, then wouldnt turning it up to 135% after calibration at 125% be the same? I would hate having to cram all that throttle response into 90% of throw.
__________________
...you better run like im booger flickin...
DaveW is offline   Reply With Quote
Old 06-16-2010, 12:15 PM   #15162
Tech Elite
 
DaveW's Avatar
 
Join Date: Mar 2003
Location: Mobile, AL
Posts: 2,964
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by M-Technic View Post
I'd say the fade is because one of the following scenarios:

2) the motor is getting hot and losing power. for some motors this can be at 160*!
My motor in question is the same LRP x12 17.5 i used on a KO BMC 1.5 speedo. It hit temps in excess of 200 degrees without fade on that speedo. In my case, 160 aint crap. lol

Admittedly i hated smelling the motor coming off the track after a run, but it was the only way i could get that thing close to pace. I would still get yanked on the straight, but could make it up in the infield.

I have a spare rotor for that motor, ill compare the two and see if that one finally gave out...
__________________
...you better run like im booger flickin...
DaveW is offline   Reply With Quote
Old 06-16-2010, 01:49 PM   #15163
Tech Elite
 
M-Technic's Avatar
 
Join Date: Sep 2007
Location: Palm Beach, FL
Posts: 2,562
Trader Rating: 15 (100%+)
Default

Quote:
Originally Posted by DaveW View Post
To keep from confusion, i have borrowed two separate RS's since my RS was in for repair. The first borrowed RS gave me NO issues. Worked like a charm and made me instantly love the speedo. The second borrowed RS is the one that gave me the current issues...

Another local suggested the same thing after my run. He asked how i set my throttle/brake endpoints and i told him i set them both at 125% to calibrate the RS. Brake usually gets turned down to the low 80's during use. He suggested settings as you just did, but havent been back to the track yet to try them.

I used these settings because they are basically my 'defaults' for any speedo i have used over the years. It allows me to compare speedos based on previously known parameters. If i wanted to stay close to that, then wouldnt turning it up to 135% after calibration at 125% be the same? I would hate having to cram all that throttle response into 90% of throw.
You will not notice the different in the throw. Give that a try.
__________________
RCAmerica | Xray | Hudy | Radiopost | Speed Passion USA | Trinity | P3 Graphics
M-Technic is offline   Reply With Quote
Old 06-16-2010, 02:04 PM   #15164
Tech Elite
 
DaveW's Avatar
 
Join Date: Mar 2003
Location: Mobile, AL
Posts: 2,964
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by M-Technic View Post
You will not notice the different in the throw. Give that a try.
OK. Ill post up my findings...
__________________
...you better run like im booger flickin...
DaveW is offline   Reply With Quote
Old 06-16-2010, 02:31 PM   #15165
Tech Master
 
Join Date: Feb 2009
Posts: 1,920
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by RTR canada View Post
does anyone know a good setting for 13.5 speed passion 3.0 motor?? and witch of the settings is for torque? Thanks
try this

http://philhoggartracing.webs.com/Te...-RS-SP13.5.pdf

this is what i use on our large outdoor track , with a 70m straight

PLEASE NOTE 0 turbo delay
sidecarphil1 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 02:35 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