Good morning,
I installed and configured the following components:
Align T-Rex 450 DFC helicopter, FC Matek H743 WLTE, GNSS & Compass Mantek M10Q 5883, ESC Wraith32 V2, FrSky Archer RS receiver, FrSky Taranis qx7 remote control accst, 3 servi Savox SH-0263mg, 1 servo Align DS520.
I manage to arm it, but the engine doesn’t start.
The esc signal is on pad S1 and the esc RX is on pad RX4. You can help me?
The log is at the link: 2023-11-25 16-11-09.rlog - Google Drive
Thank you
The link at the .bin log is: 3 25-11-2023 16-05-24.bin - Google Drive
Ciao Walter!
first, did you follow this procedure for Dshot ESCs.
Then SERVO_BLH_MASK shall be set to 1 (0 in your current config) and SERVO_BLH_OTYPE to 5 (if using Dshot300).
Check that ESC telemetry is coming through MP.
Thanks. It work, but it turns in the opposite direction. I have setting the parameter SERVO_BLH_RVMASK to reverse the direction of rotation. And thanks to your subsequent indications I have setting RPM1_TYPE:5, RPM1_ESC_MSK:1 and RPM1_SCALING:0.099 to read the main rotor rpm.
Thanks
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I’m resuming this discussion because I have some problems. I have the impression that the rotor revolutions are lower than those set (1950rpm). The flight does not seem regular to me: to maintain the hovering I have to keep the stick well beyond half of the travel, while translating I have to reduce it well below half, at regular intervals I hear a noise like rubbing. At this link three flight logs. In the first two I operated in “acro” mode, in the third in “stabilize” alternating all b and c forward and backward and all roll to the right and left. Thanks 2024-09-16 - Google Drive
Hi Walter,
sorry for the slow reply.
I see there are a lot of spikes in the rpm being reported over ESC telemetry. What is the motor timing set at on your ESC?
Today, on Ferrosan’s suggestion, I changed the parameters: “Motor Timing” to 20 and “PWM Frequency Low and Hight” to 48. The RPM are more stable even if after a few minutes of flight the variability increases with peaks and the revs are in continuous slow decrease during the flight. At the link the flightlog. 2024-10-20.bin - Google Drive
I would think that this is due to the fact that trad heli doesn’t have voltage compensation for electric motors in the RSC for the main engine. We recently put it in for DDFP tail rotors.
Hi @Brighela
I think the rpm (ESC-rpm) are dropping because the governor is not active, check the rpm bitmask (RPM1_ESC_MASK), you probably forgot to set it.
The governor is capable of overcoming the voltage drop of the battery .
I would suggest to try a bit more with the BlHeli tune, rpm plot is better than before but still not good enough in my opinion.
I configured RPM1_ESC_MASK and RPM1_scaling. I brought the ESC Motor Timing to 24. The rpm remained constant throughout the flight. I am not able to understand if the increase in Motor Timing was positive, it seems so by looking at the graph. At a sensational and auditory level the rotor turns constantly. I leave the link to the flightlogs: 2024-10-21 17-17-06.bin - Google Drive
Thanks
Hi @Brighela ,
in BlHeli try setting Motor Timing → auto, PWM freq → by rpm and Maximum Accel to 10%/ms.
Perform a hover test flight.
Then disable the governor (set H_RSC_MODE to 3) and perform another hover test.
Hi, I did the tests with the modified parameters. With the governor it went almost as before changing the ESC configuration; it did not turn at the right rpm and you could hear it scratching from time to time. Without the governor it went very well. Here are the glihtlogs: 2024-10-22 - Google Drive
Thanks