Tekin RS ESC sensored
11-11-2010, 12:20 PM
The main things peopele usuallly want to know to give advice on set-up is length of the main straight, whether it's technical or open, carpet or asphalt, stuff like that.
A lot of the hekp offered is by peoples personal experiences on similar tracks, so the more info you cangive about your track, the easier it is to give something benificial.
A lot of the hekp offered is by peoples personal experiences on similar tracks, so the more info you cangive about your track, the easier it is to give something benificial.
11-11-2010, 12:29 PM
There IS the ability to set start and end rpm for dual mode. It is similar to boost for sensored mode but works with the timing advance setting instead.
There are ways of measuring and changing timing when running sensorless, though I don't know exactly how it does it.
Trev
There are ways of measuring and changing timing when running sensorless, though I don't know exactly how it does it.
Trev
6.3. Dual mode and sensored-only mode
The RS’s firmware contains a brushless mode: dual or sensored-only.
In dual mode (the default), the RS uses the sensors only at very low speeds; then it changes to a fixed amount of timing advance (Section 6.3.1), determined without using the sensors. (The RS uses the voltage of the undriven phase wire, plus a bunch of software, to figure the timing without sensors.) If not all of the sensors are working (e.g. cable damaged) or the motor is sensorless, the RS does not use sensors at all in dual mode. Without sensors, you may notice the car go slightly in reverse before going forward when starting from a dead stop; this is not what you want at the start of a race! Dual mode avoids this bad behavior if sensors are available
6.3.1. Timing Advance (dual mode): range 0 - 100
The firmware has a built-in notion of the maximum possible timing advance when running in dual mode; it is somewhere around 25-30 degrees. The Timing Advance setting is a percentage of this maximum. So to use half the maximum you’d set TA to 50, and to use maximum timing advance you’d set TA to 100.
TA has no effect on the motor’s timing while running at very low RPMs using the sensors. The timing advance set in the motor (endbell) is used during the sensored phase of dual mode. The sensored phase is very short: only a few inches of car movement.
The RS’s firmware contains a brushless mode: dual or sensored-only.
In dual mode (the default), the RS uses the sensors only at very low speeds; then it changes to a fixed amount of timing advance (Section 6.3.1), determined without using the sensors. (The RS uses the voltage of the undriven phase wire, plus a bunch of software, to figure the timing without sensors.) If not all of the sensors are working (e.g. cable damaged) or the motor is sensorless, the RS does not use sensors at all in dual mode. Without sensors, you may notice the car go slightly in reverse before going forward when starting from a dead stop; this is not what you want at the start of a race! Dual mode avoids this bad behavior if sensors are available
6.3.1. Timing Advance (dual mode): range 0 - 100
The firmware has a built-in notion of the maximum possible timing advance when running in dual mode; it is somewhere around 25-30 degrees. The Timing Advance setting is a percentage of this maximum. So to use half the maximum you’d set TA to 50, and to use maximum timing advance you’d set TA to 100.
TA has no effect on the motor’s timing while running at very low RPMs using the sensors. The timing advance set in the motor (endbell) is used during the sensored phase of dual mode. The sensored phase is very short: only a few inches of car movement.
11-11-2010, 12:51 PM
Don't blow me up for not "tedious testing" 
but I would like to know if someone has a set up sheet for the Tekin RS (non pro) running the 17.5 tekin motor. I am running a new TCX on an indoor asphault track (West Coast Raceway). Just looking to get things close an din the "ball park" with car/motor/esc set before I go out and have a blast doing all the fine tuning.
Thanks all.
but I would like to know if someone has a set up sheet for the Tekin RS (non pro) running the 17.5 tekin motor. I am running a new TCX on an indoor asphault track (West Coast Raceway). Just looking to get things close an din the "ball park" with car/motor/esc set before I go out and have a blast doing all the fine tuning.Thanks all.
11-11-2010, 01:08 PM
As far as I know, the sensors are not used at a high enough rpm to be used to control the amount of timing advance. I think it does it some other way, but Randy or Jim would know better.
Trev
11-11-2010, 01:13 PM
In 212 the start and end rpm selection is in effect at all times. If you are in sensored only mode then the boost slider is used to determine the end timing. If you are running without a sensor harness then the timing advance slider determines the the end timing starting at 0 degrees for the start rpm. In dual mode you start using the sensors timing at extremely low rpms, then assume the same process as if you were running strictly sensorless. The notes you quoted are for previous versions of hotwire and have no bearing anymore. However, if you want your motor to feel the same as it did on 203 in dual mode, just set your end rpm to 1000 so that as soon as you get off the sensored start the full amount of timing selected in the timing advance slider is applied.
11-11-2010, 01:22 PM
In 212 the start and end rpm selection is in effect at all times. If you are in sensored only mode then the boost slider is used to determine the end timing. If you are running without a sensor harness then the timing advance slider determines the the end timing starting at 0 degrees for the start rpm. In dual mode you start using the sensors timing at extremely low rpms, then assume the same process as if you were running strictly sensorless. The notes you quoted are for previous versions of hotwire and have no bearing anymore. However, if you want your motor to feel the same as it did on 203 in dual mode, just set your end rpm to 1000 so that as soon as you get off the sensored start the full amount of timing selected in the timing advance slider is applied.
Then let me ask this: In 212, what is the point of running dual mode if it is still using an RPM range and still reading your sensors even when it's supposedly in sensorless operation?
11-11-2010, 01:38 PM
It's not reading the sensors in dual mode after it gets rolling. The timing is calculated using back emf. The timing is based on absolute, not added to the sensors.
11-11-2010, 01:43 PM
11-11-2010, 02:47 PM
11-11-2010, 02:48 PM
Running 17.5 w/BOOST-
*MOTOR ENDBELL TIMING= 30
*BOOST= 50
*TURBO= 10
*TURBO DELAY= 0.1
*TURBO RAMP= 3
*START RPM= 1532
*END RPM= 8492
*ROLLOUT= 87mm/ 3.425"
My car was fast yesterday amongst a field of 13.5's w/o BOOST. Just doing some testing here. I qualified 7th outta 16 guys. I finished 5th. About the 2minute mark though, I felt a noticeable fade. Car was still able to stay in front of a few guys charging hard but felt they were definitely faster than I was. I just kept clean and my car was really good. My question is, is this a ROLLOUT/GEARING issue or should I change something with my settings?
Btw, the way I have the brakes set up on this speedo w/my radio is awesome! I love how I can 'late apex'. Sweet!
*MOTOR ENDBELL TIMING= 30
*BOOST= 50
*TURBO= 10
*TURBO DELAY= 0.1
*TURBO RAMP= 3
*START RPM= 1532
*END RPM= 8492
*ROLLOUT= 87mm/ 3.425"
My car was fast yesterday amongst a field of 13.5's w/o BOOST. Just doing some testing here. I qualified 7th outta 16 guys. I finished 5th. About the 2minute mark though, I felt a noticeable fade. Car was still able to stay in front of a few guys charging hard but felt they were definitely faster than I was. I just kept clean and my car was really good. My question is, is this a ROLLOUT/GEARING issue or should I change something with my settings?
Btw, the way I have the brakes set up on this speedo w/my radio is awesome! I love how I can 'late apex'. Sweet!
how much voltage is used and mah
11-11-2010, 04:35 PM
11-11-2010, 06:01 PM
When is Tekin going to come out with a VTA certified speedo? My T3'11 has no room on the chassis and I need something small like the Tekin. Man it's frustrating, I bought a RS before the rule came down and now I can't use it. Makes me want to sell my RC gear and find a different hobby. My local track won't accept them even with the 212 software. 
11-11-2010, 06:22 PM
Thanks for the help guys. So far today the car is running well. The 212 update is smooth!
11-11-2010, 06:38 PM
11-11-2010, 06:46 PM
Tech Master
When is Tekin going to come out with a VTA certified speedo? My T3'11 has no room on the chassis and I need something small like the Tekin. Man it's frustrating, I bought a RS before the rule came down and now I can't use it. Makes me want to sell my RC gear and find a different hobby. My local track won't accept them even with the 212 software.