I changed flight controllers on my Gas-800 from a Cube Orange to a CUAV x7.
Re-Calibrated Radio,
I have everything working except throttle servo.
Helicopter Arms fine, CH8 out on status page shows pwm ramp up when interlock is enabled like it should.
I’ve checked all wiring and it is ok. I moved the throttle servo to CH4(Rudder) and it works fine.
Is this an issue with the CUAV x7 or am I missing something simple.
@Shotfire Doug,
Could you post a parameter file? What version of code? You could try to move HeliRSC to another servo channel (like channel 6 or 7) and see if it works there. Very odd that it shows the PWM change in mission planner status page but you aren’t getting any servo movement. You could try H_RSC_MODE passthrough. I assume you are using either throttle curve or governor modes.
@bnsgeyer Bill,
I just talked to Chris and he had the same opinion that I do, if you don’t see anything wrong in the param file that it is most likely a hardware definition that is incorrect
@Shotfire Doug,
Please provide some detailed info on your setup
FC: CUAV x7
Servo brand/model:
receiver brand/model:
Arducopter Firmware version:
@tridge It appears we have a potential hardware issue. Any additional info you might need to determine the problem?
BK-Servos BLS-8002HV, Throttle and cyclic, cyclic works fine
FrSky x10 express, X8 reciever
9/29/2021 10:53:24 AM : PreArm: Collective below Failsafe
9/29/2021 10:53:16 AM : EKF2 IMU1 is using GPS
9/29/2021 10:53:16 AM : EKF2 IMU0 is using GPS
9/29/2021 10:53:16 AM : Frame: HELI
9/29/2021 10:53:16 AM : RCOut: PWM:1-4
9/29/2021 10:53:16 AM : CUAV-X7 00310041 3139510F 34353534
9/29/2021 10:53:16 AM : ChibiOS: d4fce84e
9/29/2021 10:53:16 AM : ArduCopter V4.0.7 (0bb18a15)
9/29/2021 10:53:15 AM : Frame: HELI
9/29/2021 10:53:15 AM : RCOut: PWM:1-4
9/29/2021 10:53:15 AM : CUAV-X7 00310041 3139510F 34353534
9/29/2021 10:53:15 AM : ChibiOS: d4fce84e
9/29/2021 10:53:15 AM : ArduCopter V4.0.7 (0bb18a15)
9/29/2021 10:53:15 AM : Frame: HELI
9/29/2021 10:53:15 AM : RCOut: PWM:1-4
9/29/2021 10:53:15 AM : CUAV-X7 00310041 3139510F 34353534
9/29/2021 10:53:15 AM : ChibiOS: d4fce84e
9/29/2021 10:53:15 AM : ArduCopter V4.0.7 (0bb18a15)
There is a mismatch somewhere, you need more than 4 PWM RCout to fly your copter.
As I recall BRD_PWN_COUNT refers to the AUX channels 1-6, I’m using 5&6 as inputs,
That’s why RCOut is showing 4
The BRD_PWM_COUNT only refers to the way 1-6 aux channels are used.
By setting this to “4” then I can use “Aux 5&6” as inputs.
I use Pin54 which is AUX5 as RPM sensor input
I use Pin55 which is AUX6 as a FUEL_LEVEL sensor input
After saying all this, I did, just for kicks change BRD_PWM_COUNT to 8 and the throttle servo still did not move.
Now for the weird part, I changed BRD_PWN_COUNT back to 4 “Where it was before” and now the Throttle Servo works like it’s supposed to.
Seems there was some board level initial setting that may have been wrong and by changing BRD_PWN_COUNT to 8 then back to 4 it reset it.
If I get a chance I will load “Plane” then back to “Heli” and see if I can reproduce issue.
Anyway, it’s working for now, @bnsgeyer @mlebret thanks for your suggestions.
Doug
If anyone runs into this problem with different FlightControllers Check this
After a through investigation this is the answer:
On a cube Autopilot BRD_PWM_COUNT is referring only to the 1-6 AUX Channels, so if you set the count to 4 then it enables AUX Channels 5&6 to be inputs from other devices like RPM, FUEL etc:
On the CUAV x7 there is no separation between channels 1-8 and 9-14 its just 1-14 so in order to use Channel 13&14 as inputs the BRD_PWM_COUNT must be set to 12
All Working now
In my previous post I had forgotten to re-boot the AutoPilot, that’s why I thought it was working with BRD_PWM_COUNT set to 4, it only reads that on BootUp
1 Like