ESC32V3 + RCTIMER 5010 260Kv + RCTIMER 17x5.5

Info and Discussion about the ESC32 hardware and software

ESC32V3 + RCTIMER 5010 260Kv + RCTIMER 17x5.5

Postby fred_fr » Mon Sep 14, 2015 8:30 pm

Hi,

I have just finish the ESC32 V3 calibration procedure for the combination below:
- RC TIMER 5010-260 KV : http://www.rctimer.com/product-1301.html
- RC TIMER 17x5.5 propeller : http://www.rctimer.com/product-877.html
- 6s multistat 5200 Ma Lipo : http://www.hobbyking.com/hobbyking/store/__56841__Multistar_High_Capacity_6S_5200mAh_Multi_Rotor_Lipo_Pack.html
- Turnigy Thrust Stand : http://www.hobbyking.com/hobbyking/store/__66623__Turnigy_Thrust_Stand.html

- default configuration off ESC

RPM calibration :
ESC32_v3.3.1_cal_R2V_20_RCtimer5010-260kv-17x5_5.JPG


Trusth curve :

thrust-RCtimer5010-260kv-17x5_5.JPG
thrust-RCtimer5010-260kv-17x5_5.JPG (72.13 KiB) Viewed 10927 times



fred
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Re: ESC32V3 + RCTIMER 5010 260Kv + RCTIMER 17x5.5

Postby JussiH » Tue Sep 15, 2015 8:55 am

Thanks for posting!

I am not sure I like your thrust curve - the peaks and bumps points to problems with the measurement accuracy or other disturbances. I would expect to see a more even distribution of the data points.

Why are the RPM intervals in "odd" numbers. Are you using a servo tester to run the motor? Is the test motor set to closed loop RPM and the FF terms properly loaded?

You should use the RPM command to control the motor to an exact RPM and measure the thrust produced.

I would recommend doing the measurements in 300 or 500 RPM intervals....so its like 300-600-900-1200 etc.
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Re: ESC32V3 + RCTIMER 5010 260Kv + RCTIMER 17x5.5

Postby fred_fr » Tue Sep 15, 2015 9:41 am

JussiH wrote:Thanks for posting!

I am not sure I like your thrust curve - the peaks and bumps points to problems with the measurement accuracy or other disturbances. I would expect to see a more even distribution of the data points.

Why are the RPM intervals in "odd" numbers. Are you using a servo tester to run the motor? Is the test motor set to closed loop RPM and the FF terms properly loaded?

You should use the RPM command to control the motor to an exact RPM and measure the thrust produced.

I would recommend doing the measurements in 300 or 500 RPM intervals....so its like 300-600-900-1200 etc.


I use a video camera to the register the calibration processs with ESC32 tools and after a replay movi to determine RPM and thrust. And the FF term is not loaded :oops: ...

I redo test with FF terms properly define :D and use RPM step with ec32V3 cli command

thanks for your remarks
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Re: ESC32V3 + RCTIMER 5010 260Kv + RCTIMER 17x5.5

Postby fred_fr » Tue Sep 15, 2015 6:59 pm

new thrust graph

thrust-RCtimer5010-260kv-17x5_5-v2.JPG
thrust-RCtimer5010-260kv-17x5_5-v2.JPG (69.99 KiB) Viewed 10887 times
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Re: ESC32V3 + RCTIMER 5010 260Kv + RCTIMER 17x5.5

Postby chschmid » Thu Sep 17, 2015 6:11 am

Hi Fred

Seems to be reasonable although your thrust seems to be low for a 17" prop.
Below is a log for a 15x5 Tiger prop for comparison.

Code: Select all
Tested Unit: U5, Tiger 15x5, ESC32v3, 6s

StartRPM:     1000
RPM Steps:     200
Max RPM:      7000
Prop Blades:     2
PWM Offset:   1000
Max PWM:      1950

Sensors tared to 0.
ESC armed, starting thrust log...

RPMin; PWM; RPMeff; ToL(gr*m); ToR(gr*m); Thrust (gr)
-----------------------------------------------------
  1000;   1135;    360;   0.1536;   0.3600;      7
  1200;   1162;   1140;   0.5905;   0.0000;     72
  1400;   1190;   1380;   1.1517;   0.0000;     99
  1600;   1217;   1560;   1.5531;   0.0000;    126
  1800;   1244;   1800;   2.0645;   0.0000;    163
  2000;   1271;   1980;   2.6963;   0.0000;    209
  2200;   1298;   2220;   3.5969;   0.0000;    257
  2400;   1325;   2340;   4.5609;   0.0000;    306
  2600;   1352;   2580;   5.6416;   0.0000;    360
  2800;   1380;   2760;   6.8061;   0.0000;    423
  3000;   1407;   2940;   8.1088;   0.0000;    492
  3200;   1434;   3240;   9.4471;   0.0000;    565
  3400;   1461;   3360;  10.7580;   0.0000;    643
  3600;   1488;   3540;  12.1937;   0.0000;    727
  3800;   1515;   3840;  13.8849;   0.0000;    815
  4000;   1542;   3960;  15.6134;   0.0000;    898
  4200;   1570;   4320;  17.3996;   0.0000;    987
  4400;   1597;   4440;  19.2142;   0.0000;   1068
  4600;   1624;   4740;  21.1587;   0.0000;   1156
  4800;   1651;   4860;  23.0648;   0.0000;   1244
  5000;   1678;   5040;  25.1501;   0.0000;   1321
  5200;   1705;   5160;  27.3947;   0.0000;   1392
  5400;   1732;   5400;  29.5753;   0.0000;   1450
  5600;   1760;   5580;  31.6625;   0.0000;   1523
  5800;   1787;   5760;  33.9578;   0.0000;   1580
  6000;   1814;   6060;  36.1408;   0.0000;   1645
  6200;   1841;   6180;  38.2109;   0.0000;   1694
  6400;   1868;   6480;  40.4003;   0.0000;   1739
  6600;   1895;   6540;  42.1895;   0.0000;   1780
  6800;   1922;   6720;  44.2057;   0.0000;   1820
  7000;   1950;   6960;  45.8757;   0.0000;   1846



Least Squares Regression for Quadratic Curve Fitting
Values based on input RPM
MOT_VALUE2T_A1(x);   MOT_VALUE2T_A2(x^2);   PROP_K1 (CCW); PROP_K1 (CW)
8.65842775E-02; 3.07760638E-05;  57.26;    inf

Least Squares Regression for Quadratic Curve Fitting
Values based on measured RPM
MOT_VALUE2T_A1(x);   MOT_VALUE2T_A2(x^2);   PROP_K1 (CCW); PROP_K1 (CW)
2.03456506E-01; -2.33752893E-08;  57.26;    inf


Cheers
Christof
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Re: ESC32V3 + RCTIMER 5010 260Kv + RCTIMER 17x5.5

Postby afernan » Thu Sep 17, 2015 9:12 am

At 4000rpm, it gives 1.3Kg thrust with 17", while Christof shows 900g with 15" at same rpm. Seems good value.
It can´t get more rpm because kv=360 I guess (I don´t know RCTIMER 5010 kv=260)

Angel
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Re: ESC32V3 + RCTIMER 5010 260Kv + RCTIMER 17x5.5

Postby fred_fr » Thu Sep 17, 2015 11:38 am

yes the RCTIMER 5010-260 is not so bad for the price motor 20 € and propeller 9 € and suitable for recreational use.

I think we have more RPM in the air.

I test later with 18x5.5 propeller ..
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Re: ESC32V3 + RCTIMER 5010 260Kv + RCTIMER 17x5.5

Postby fred_fr » Mon Sep 21, 2015 1:03 pm

After reading some post ans test my last esc32v3 configuration file

ACTIVE_FREEWHEEL 1
ADVANCE 20
AUDIO_VOLUME 2
BAD_DETECTS_DISARM 32
BAUD_RATE 230400
DIRECTION -1
ESC_ID 1
FF1TERM 5.45419e-07
FF2TERM 0.00359981
GOOD_DETECTS_START 48
ITERM 0.005
MAX_CURRENT 9
MAX_PERIOD 12000
MIN_PERIOD 50
MOTOR_POLES 14
PTERM 0.5
PWM_HI_VALUE 1950
PWM_LO_VALUE 1000
PWM_MAX_PERIOD 20000
PWM_MAX_VALUE 2250
PWM_MIN_PERIOD 2200
PWM_MIN_START 1100
PWM_MIN_VALUE 750
PWM_RPM_SCALE 4000
RPM_MEAS_LP 0.75
SERVO_D 0
SERVO_DUTY 5
SERVO_MAX_RATE 1000
SERVO_P 0.05
SERVO_SCALE 360
STARTUP_MODE 0
START_CURRENT 0.75
START_VOLTAGE 2.5
SWITCH_FREQ 20
THR1TERM 0
THR2TERM 1
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Re: ESC32V3 + RCTIMER 5010 260Kv + RCTIMER 17x5.5

Postby fred_fr » Sat Sep 26, 2015 5:18 pm

Some test today

with this configuration the motor 4 stops occasionally ad restart after.

I thinks is a problem of advanced timing , I"m right ? , I need to increase advance timing i?
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Re: ESC32V3 + RCTIMER 5010 260Kv + RCTIMER 17x5.5

Postby LPR » Sat Sep 26, 2015 7:02 pm

Fred

Having just one motor stop will flying is not a good thing. You might want to check the temperature of the ESC32 V3. If they are over 80 c that might be the problem. I would doubt that temperature is your problem but if you have them inclosed with no heat sink that might be your problem.
You can read the temperature with QGC ESC Telemetry.

Your motors with just 12 poles should not need to have a high timing advance but you could try it.

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