R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 03-07-2010, 04:32 PM   #13066
Regional Moderator
 
Jon Carlson's Avatar
 
Join Date: Jun 2002
Location: North Dakota
Posts: 2,882
Trader Rating: 48 (100%+)
Default

Quote:
Originally Posted by Roberto Falcon View Post
i have a touring car... no it not just like it doesnt have top speed it just falls on its face like it i had no battery which im running a thunder power 5000 40c and theres a couple guys at the track thats happening to them aswell . my turbo delay is at 0.0

well i have a spectrum and i already did that trick i set my travel for my throttle to 140 and reset everything to radio and the esc then set it back to 150 and it still slowed down .. its like if the speedcontrol is shutting down or somthing.
With the 0.0 delay you could be overheating the motor.
__________________
Jon Carlson
Team Associated, Reedy
Futaba, OS Engines, O'Donnell Racing Fuel
Jon Carlson is offline   Reply With Quote
Old 03-07-2010, 04:36 PM   #13067
Tech Elite
 
Join Date: Feb 2004
Location: Maitland, FL
Posts: 2,186
Trader Rating: 18 (100%+)
Send a message via AIM to Roberto Falcon
Default

when that happens the motor is at 160
__________________
🤔
Roberto Falcon is offline   Reply With Quote
Old 03-07-2010, 05:01 PM   #13068
Tech Lord
 
20 SMOKE's Avatar
 
Join Date: Dec 2003
Location: HVR_ WEEKI WACHEE FL
Posts: 10,299
Trader Rating: 101 (100%+)
Default

how many led's are flashing when this happens
__________________
Jamie W
*Team Tekin*Tekno-rc*DE Racing*AKA*DDHRC*
20 SMOKE is offline   Reply With Quote
Old 03-07-2010, 05:13 PM   #13069
Tech Elite
 
Join Date: Feb 2004
Location: Maitland, FL
Posts: 2,186
Trader Rating: 18 (100%+)
Send a message via AIM to Roberto Falcon
Default

idk normal when theres no power you know..
__________________
🤔
Roberto Falcon is offline   Reply With Quote
Old 03-07-2010, 07:09 PM   #13070
Tech Regular
 
Join Date: Jun 2008
Posts: 275
Default

have you cycled your battery to see if it still takes a charge and has full capacity. maybe even use a competition electronics charger/discharger and put a good 30 amp load on it and watch the voltage.

if it is a pretty fast transition from speedy to slow (like under 10 seconds) then something might be triggering a failsafe somewhere (temperature, low BEC voltage), but i am a novice so dont take my advice until a pro agrees with me.
benben10 is offline   Reply With Quote
Old 03-07-2010, 07:32 PM   #13071
Tech Fanatic
 
RKeasler's Avatar
 
Join Date: Jul 2002
Location: A step closer to where I need to be a step further from where I was
Posts: 810
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by Roberto Falcon View Post
it is fine and fast through the first 3 mins or so but falls on its face bad like litterly slows down completly like if your gonna blow up the motor but the motor is only about 160 deg at that point ..


tekin pro with a lrp x12 13.5

profile 5 .. turbo timing at 40 and boost at 10 end rpm at 12000 and start at 4600

ramp at 3
Extra timing and the x12 has shown to be a bad combo for the most part. Try another motor.


Rod
__________________
ClemsonTigers
USVTA # 224
ERC
RKeasler is offline   Reply With Quote
Old 03-07-2010, 08:00 PM   #13072
Tech Regular
 
Join Date: Sep 2009
Posts: 300
Default Question / Concern

Guys:

I've read on this thread that there could be a scenario where reverse current flow from the Tekin speed control could fry ones steering servo.

If the above is indeed correct, would there be the possibility that a reverse current flow from the tekin could cause ones receiver to fry?

Just asking as I had a run away car today due to my receiver going dead...spektrum SR3000.

Your thought are appreciated.
MH
mhavlena is offline   Reply With Quote
Old 03-07-2010, 08:20 PM   #13073
Tech Champion
 
Still Bill's Avatar
 
Join Date: Jan 2004
Location: Reno, NV
Posts: 7,234
Trader Rating: 12 (100%+)
Default

Quote:
Originally Posted by Roberto Falcon View Post
idk normal when theres no power you know..
Roberto,

Please place all your Tekin and motor settings down in one post to get more valid input from the 'peanut gallery'. Thanks.

Bill
__________________
Constantly evolving CRC WGT and WGT-R/T...Carpet & Asphalt...All thanks to Team CRC.

And a pair of Associated B6 buggies for turf and clay tracks.
Still Bill is offline   Reply With Quote
Old 03-07-2010, 08:24 PM   #13074
Tech Elite
 
niznai's Avatar
 
Join Date: Feb 2009
Location: All over the place
Posts: 2,940
Default

Quote:
Originally Posted by mhavlena View Post
Guys:

I've read on this thread that there could be a scenario where reverse current flow from the Tekin speed control could fry ones steering servo.

If the above is indeed correct, would there be the possibility that a reverse current flow from the tekin could cause ones receiver to fry?

Just asking as I had a run away car today due to my receiver going dead...spektrum SR3000.

Your thought are appreciated.
MH

Not sure any reverse EMF can work its way back through the final drivers of the ESC, then onto the BEC. There are simple electronics that can chop off any reverse EMF long before that happens so I don't imagine Tekin would be caught out.

That doesn't mean it can not ever happen. Just very unlikely.

On the other hand I have had Spektrum receivers like yours lose binding/radio connection momentarily and that can get you into a lot of trouble.
__________________
Team Greasy Weasel

The best upgrade to any car is some driver skill.
niznai is offline   Reply With Quote
Old 03-07-2010, 09:22 PM   #13075
Tech Elite
 
theisgroup's Avatar
 
Join Date: Apr 2002
Posts: 3,191
Trader Rating: 10 (100%+)
Default

Quote:
Originally Posted by mhavlena View Post
Guys:

I've read on this thread that there could be a scenario where reverse current flow from the Tekin speed control could fry ones steering servo.

If the above is indeed correct, would there be the possibility that a reverse current flow from the tekin could cause ones receiver to fry?

Just asking as I had a run away car today due to my receiver going dead...spektrum SR3000.

Your thought are appreciated.
MH
i am not sure how you would get reverse emf. for 1 the speedo is the unit that powers the rx and the steering servo. so that is the way it is suppose to work. second the bec drops the voltage out of the speedo to 5.7. even when you power the speedo with a 2s lipo(8.4) and then the 1s of the car. that is 12.6 into the "control" circuit and then it still puts out 5.7.

the only thing that tekin is looking at is sending 8.v voltage into the speedo from a rx pack plugged into the rx. then what you are doing is feeding 8.4 back through the bec circuit. that seam to be the only "issue" at this time with the speedo. but that is not back emf. that is direct current flow feeding in to the speedo's bec. so really we are feeding the bec in the wrong direction. if that is what you are refering to. then yes there is a problem with this. no feeding 8.4v to servos may not be a good thing either. so you may need to check your servo specs. i know all my KO stuff in my 1/12 is all ok with 2s lipos(8.4v)

I don't believe that your sources understand electronics to understand back emf
__________________
yang lai

Team Tamale | Team Tekin | RCAmerica | Speedmerchant | Speedzone RC | EA Motorsports | Ko Propo USA | eXpress Motorsports | Parma/PSE
theisgroup is offline   Reply With Quote
Old 03-08-2010, 12:31 AM   #13076
Tech Addict
 
Join Date: Feb 2007
Posts: 596
Default

Quote:
Originally Posted by Roberto Falcon View Post
it is fine and fast through the first 3 mins or so but falls on its face bad like litterly slows down completly like if your gonna blow up the motor but the motor is only about 160 deg at that point ..


tekin pro with a lrp x12 13.5

profile 5 .. turbo timing at 40 and boost at 10 end rpm at 12000 and start at 4600

ramp at 3
simple answer... too much timing.

use the -10 insert in the back of the motor and back your boost/turbo down to 30 boost, 10 turbo to start with.
the x12 motors have a lot of timing built in.
__________________
CPD Racing
chris_dono is offline   Reply With Quote
Old 03-08-2010, 12:34 AM   #13077
Tech Addict
 
Skitee's Avatar
 
Join Date: Jul 2005
Location: Johannesburg, South Africa
Posts: 745
Default

Hey there guys picked up 2 good wins with the Tekins this weekend, thought I'd share the setups.

Track size 43M x 23M / 141Ft x 75Ft, longest straight 36M / 118Ft

10.5 Speed Passion V3

Motor Timing : +5
Boost : 50
Turbo : 10
Turbo delay : .5
Turbo ramp : 1
Throttle Profile : 3
Start RPM : 4000ish
End RPM : 18000ish
FDR : 8.33
Motor Temp : 68c/154f

13.5 Team Orion Vortex 2008

Motor Timing : 0
Boost : 52
Turbo : 5
Turbo delay : .5
Turbo ramp : 1
Throttle Profile : 4
Start RPM : 4000ish
End RPM : 16000ish
FDR : 7.69
Motor Temp : 70c/158f
__________________
Xray T4 2018 ~ HobbyWing Xerun XR10 Pro ~ Motiv RC 4.5
Xray X12 2018 ~ ORCA Vritra VX3 1S ~ Speedzone 4.5

POWERED BY SPEEDZONE USA

Last edited by Skitee; 03-08-2010 at 01:31 AM.
Skitee is offline   Reply With Quote
Old 03-08-2010, 02:54 AM   #13078
Tech Elite
 
razzor's Avatar
 
Join Date: Aug 2005
Location: Durban, South Africa
Posts: 2,810
Default

Quote:
Originally Posted by mhavlena View Post
Guys:

I've read on this thread that there could be a scenario where reverse current flow from the Tekin speed control could fry ones steering servo.

If the above is indeed correct, would there be the possibility that a reverse current flow from the tekin could cause ones receiver to fry?

Just asking as I had a run away car today due to my receiver going dead...spektrum SR3000.

Your thought are appreciated.
MH
most likely you had a voltage drop and lost bind.
try using a reciever cap to prevent voltage drops.
__________________
Casterracing ZX1.5R
casterracing EX-1 Pro, SP Silver Arrow
TOP Racing Scythe, SP 17.5, SP GT Pro 2.0
TOP Racing Scythe, SP 4.5 V2, Hobbywing Xerun 120SD 2.0
TOP Racing Scythe, SP 13.5, Hobbywing Xerun 120SD 2.0
razzor is offline   Reply With Quote
Old 03-08-2010, 04:07 AM   #13079
Tech Apprentice
 
muzza's Avatar
 
Join Date: Feb 2006
Posts: 68
Trader Rating: 1 (67%+)
Default tekin

hi can i ask what kind of reciever cap youre using im having the same problemsthe car will go dead for a fraction of a second and will just go straight most of the time into the boards had a few big accidents also what gear ratio would you use for 13.5
muzza is offline   Reply With Quote
Old 03-08-2010, 04:43 AM   #13080
Tech Elite
 
razzor's Avatar
 
Join Date: Aug 2005
Location: Durban, South Africa
Posts: 2,810
Default

i am using a 4700mfd 16v fitted to a servo plug.
__________________
Casterracing ZX1.5R
casterracing EX-1 Pro, SP Silver Arrow
TOP Racing Scythe, SP 17.5, SP GT Pro 2.0
TOP Racing Scythe, SP 4.5 V2, Hobbywing Xerun 120SD 2.0
TOP Racing Scythe, SP 13.5, Hobbywing Xerun 120SD 2.0
razzor 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 02:11 AM.


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