@Matt_Kreikamp wrote:
hi guys just got the journey for Christmas having so much fun with it but crashed pretty hard and broke one of the teeth on the motor gear. Do you guys think I should order new motors from skyviper? or I was thinkining about buying after market brushless motors and modding them in would that be possible? I’m handy with a soldering iron thanks in advance for any help you could offer?
Posts: 2
Participants: 2
@Maxowusu wrote:
Hello,
I’ve been trying to take my first flight, but I’m getting some weird behaviour. I’m using Qgroundcontrol version 3.4.4 and I have Ardupilot version 3.6.4 on my Pixhawk. My quad start spinning pretty rapidly in the “yaw” direction. I’ve calibrated my ESC’s multiple times, and that does not seem to do the trick. I’ve tried trimming on my remote, but that just makes two motors stop if I try to counter the spin. Does anyone know what I should do to fix this? Do I need to retune the PID or something like that?
Any help is appreciated.
Max
Posts: 2
Participants: 2
@Amozov_x wrote:
Hello.
Today it was sunny outside. No wind. Temperature is minus 15 degrees. When I turned on the power, the autopilot was loaded every time, but one regulator squeaked. At home everything was fine. I sat in the car with a quadcopter for a bit and came out again, tried everything well. I takeoff in the stabilization mode and everything is fine in the loiter. After 3 minutes, somewhere I decided to do autotune!
The quadcopter once deviated and returned. And the next time I flipped over already. I suspect that most likely one engine turned off, as it was originally when I turned on the power. In vain I flew. Attached to the topic logs. You can look to help. Can you notice what the problem is. Thank you in advance.2019-01-09 16-13-10.tlog (859.9 KB)
Posts: 1
Participants: 1
@Micky693 wrote:
Hi I have pixhawk cube which I’m trying to run 2 gps units which are here gps 2 an original gps pixhawk 2.1 gps unit I have main connect into gps 1 an 2 into gps 2 port which modified cable when I switch the pixhawk on both lights flash on gps unit it doesn’t get gps lock then afterwhile both gps units shut down can anyone offer any advice thanks.
Posts: 1
Participants: 1
@josheeg wrote:
BUG Height just keeps increasing at loop point. SITL Linux Ubuntu 18.10
I create a VTOL Mission just Vtol takeoff to a height 250 ft increase 25 ft to 400ft in a circle then back down to 250 ft by 25 ft incriments in waypoints.
The vtol plane takes off hits all the waypoints I drew then it hit loop I right clicked after drawing the map and mission loop. that closed the loop so it stops and keeps gaining atlitude at loop wp with alt 0.
Posts: 1
Participants: 1
@josheeg wrote:
VTOL Mission loop after drawing the mission altitudes vtol takeoff and waypoints heigher by 25ft keeps going up at loop wp?
Posts: 2
Participants: 1
@fsherratt wrote:
HI all,
I’ve recently started developing a native MAVLink library for Matlab. At the moment it’s just a small set of messages and supporting functions. But my aim is for this be included as a mavgen option in the future.
I’d be extremely grateful for any comments or suggestions on the code so far. You can find the library here https://github.com/fsherratt/MAVLink_Matlab
Freddie
Posts: 1
Participants: 1
@MickeM wrote:
Hi,
I am building a 900mm, 7kg octacopter with Tiger Motors. I have always mounted the motors directly on the carbon motor-plates which are directly on the booms. Do any of you use any dampening between motors and motor-plates? Like rubber of any kind to lower vibrations.
/MickeM
Posts: 1
Participants: 1
@MickeM wrote:
Hi,
Have 6 Tiger Motors (MN4014) on a hexacopter.
This is when they are off.
When lifting one propeller tip, the motor gives a little knock-sound, on some motors.
Motors have been used over 20h.
Is it the bearings?
Is it normal? Is there a little play?
Something to worry about?
I know Tiger Motors should have their bearings changed after how many hours it was… 50-60?
How do I know a bearing is getting bad?
Hot motor? Any special sound when using them?/MickeM
Posts: 1
Participants: 1
@MickeM wrote:
Anyone using Loc8tor on your multicopters to find them IF they are lost for some reason (flyaway or dropped in the woods …)?
Any experience?
Posts: 1
Participants: 1
@thethaibinh wrote:
When I tried to run HIL with sim_vehicle.py script with parameter:
sim_vehicle.py -L KSFO -v ArduPlane -f quadplane --console --map --hil
This lead to run runsim.py and I got an error at line 8 when import fdpexpect.
output at JSBSim console
“import fdpexpect
ImportError: No module named fdpexpect”
I have tried with Python2.7 and 3.5 interpreter and got the same result.
Could anyone help me with this?
Posts: 1
Participants: 1
@wazoo22 wrote:
I’m trying to use a second GPS (identical to first- BN880) on uart4, and ESC telemetry on uart5. I’ve read the section on GPS blending (aka second gps) and set the parameters they said, and looked at the lone picture of the single telemetry lead from the 41 amp esc (same one I’m using, it happens) to somewhere on the uart5 side, (not much help) but not sure about the pinouts and how the single six pin connector should be wired to allow both.
Anyone successfully done this?
Posts: 1
Participants: 1
@Develop_ESPrtk wrote:
What is ESPrtk ?
ESPrtk is a small circuit board used to transmit wireless GNSS data in high precision positioning applications.
ESPrtk is geared towards the ability to use high quality, independent, wireless and low cost platforms.
ESPrtk’s heart is a powerful ESP32 processor.So what does ESPrtk include?
ESPrtk is an abbreviation for ESP32 RTK.
ESPrtk is available in two formats. Software for DIY users and hardware for direct users.
An ESPrtk V1 circuit board:
ESPrtk board V1 pinout mapping:
and features on its 2.4.1 version:
ESPrtk can be used with many GNSS RTK devices.
RTK-capable receivers require precisely calibrated antennas to process signals transmitted by the GNSS satellites. The process for achieving centimeter-level position accuracy in GNSS involves a complex algorithm known as real time kinematic (RTK) processing. In addition, they must receive and process corrections data from a ground network of GNSS receivers. These factors made traditional RTK-capable receivers costly (in excess of $5000 or even $10,000 ) and bulky, making them unsuitable for cost- and size-sensitive applications.
Recently, GNSS equipment manufacturers have started advertising inexpensive (less than $500) and compact RTK-capable receivers. Some prominent names:
- Hemisphere- Eclipse P307 (L1/L2).
- NVS Technologies- NV08C-RTK (L1).
- Swift - Piksi Multi (L1/L2).
- u-blox -NEO-M8P (L1).
- Skytraq -S2525F8 (L1).
Evaluation of Low-Cost, Centimeter-Level Accuracy OEM GNSS Receivers.RTK receivers are getting smaller and smaller, but accuracy is improving. At the same time, there was a powerful embedded CHIP is ESP32, which attracted everyone in IoT applications and GNSS data transmission for RTK positioning is one of them.
ESPrtk aims to be simple, user-friendly and safe to use.
ESPrtk was born to provide High quality RTK positioning solution with low cost option. This is an effort to make accessing and using high-precision positioning technology easier for everyone. Especially for those who have hobby about it.
Highlights of the design are the Web Config User Interface (UI) application, which makes it easy to test or configure it and the peripherals it connects to.
Along with that are layers of security with high-level encryption for transmitting GNSS data to public servers (where your data can be abused without your permission). Data encryption is also applied to all important files on ESPrtk in order to protect users as much as possible. Users can even activate a permanent lock with their password to make sure no one can change anything on their ESPrtk.
(Screenshot ESPrtk-BLE is running web configure on Google Chrome to setting some profile’s information. )RTCM 3.x, RAW, NMEA are data types transmitted.
ESPrtk uses two ways to transmit data:
Online: ESPrtk is a client that uses a service to collect / distribute data from the server via an internet connection (WiFi/Ethernet).
Offline: ESPrtk will use its own Wifi or Bluetooth connection to perform wireless communication in the distribution of data.If set to a Base, it will collect data from one of the UART ports and then send it over the wireless interface to one or more other devices (Rover).
If set to Rover, the data received from the Base will be streamed to the UART port to the RTK module.MQTT model:
MQTT RTK is the most powerful transmission model today and will be the future alternative to NTRIP.REAL-TIME VEHICLE MONITORING AND POSITIONING USING MQTT FOR RELIABLE WIRELESS CONNECTIVITY
MQTT Protocol for Real‐Time GNSS Data and Correction Distribution
China Satellite Navigation Conference (CSNC) 2018 Proceedings
ESPrtk, when fully configured, can provide multiple connections at the same time.
ESPrtk is a Base can send RTCM / RAW to MQTT Server (Broker). (and Stream out NMEA data collection from the Rover to controler center.)
ESPrtk is a Rover that receives RTCM data from the Broker. ( can also export NMEA data to another device via Bluetooth at the same time.)NRTIP model:
NTRIP has a history of over 20 years of development with extensive base networks around the world. Supported on any existing device. ESPrtk too.
ESPrtk is a Base can send RTCM / RAW to NTRIP Server (Caster).
ESPrtk is a Rover that receives RTCM data from the Caster. ( can also export NMEA data to another device via Bluetooth at the same time.)Offline using WiFi signal:
When the internet connection is unavailable (the NTRIP / MQTT online service is not available), ESPrtk can use its WiFi signal to transmit GNSS data.
This is similar to the full MQTT functionality but is offline. The connections deployed in both protocols are TCP and UDP with the distance constrained to the WiFi transmit power.
ESPrtk will operate stably with a 150 to 200 meter baseline when using external antennas.
(Esp32-wroom-32u-front-back support external antenna. )Bluetooth bridge RTK:
SPrtk will work just like the Bluetooth-To-Serial module. It will collect (regardless of RTCM / NMEA / RAW / … data type) from the RX-UART1 port and then send it to the Bluetooth device, or (and) Stream the data received via Bluetooth to the TX-UART2 port.
This function is particularly useful for users who want to collect output data from a GNSS device without having to directly connect to the wire. Featured Android applications such as “NTRIP Client” , “GNSS Surveyor”, “Bluetooth GPS”, “Bluetooth GPS Provider” ,”Mapit GIS”,”Bluetooth GPS Status Tool”, “SkyPro GPS Status Tool”…. supported this function.
(screenshot on GNSS Surveyor app)And more…
There is much to say about detail ESPrtk with interesting functions on it. I hope the introduction is not too short to finish, please read other articles to know more about them…on esprtk.wordpress.com
Free Firmware , Debug tool, Opensourse Hardware design, tutorials blog , image,… are available now at https://esprtk.wordpress.com/download-and-documents/
and follow us on https://twitter.com/esprtk
Posts: 3
Participants: 2
@Lbarreiro wrote:
Hi all,
Read somewhere that for foam planes it´s good idea to keep de servo_auto_trim always enable.
As i was analyzing (not searching for nothing, only learning to
) the last 2 log´s I found one thing:
that command is always trimming as showed in this graphics:
![pic1]()
I wonder if is better to turn it off, and time to time enable it,
Any opinions?
Thanks
Posts: 1
Participants: 1
@jesus_taax wrote:
Hello,
I want to change de values of the PID controller in the servo gimbal, anyone knows where is it in the code?
Thanks
jesus
Posts: 1
Participants: 1
@michal wrote:
If I understand px4flow docs (https://docs.px4.io/en/sensor/px4flow.html) correctly, it outputs mainly the general flow_x and flow_y numbers (and some values calculated from that).
Is it possible to get out of px4flow the array of vectors calculated across the grid of the image. Something like this (visualized):
(image source: http://www.hizook.com/blog/2010/02/16/learning-estimate-robot-motion-and-find-unexpected-objects-optical-flow )
Posts: 1
Participants: 1
@mike wrote:
When I discovered the 3DR Solo main board as a building block for DIY, because it has a Pixhawk 2 and a companion computer with HD video and telemetry for a very cheap price, I built the FrankenSolo. I used a recycled set of plates from a Daya 680 because it was wide enough for the Solo mainbrd. But it is not necessary to use a Solo mainbrd, all of this could be done with a normal Pixhawk.
https://www.rcgroups.com/forums/show…DS-FrankenSolo
But as with most DIY builds I had to do a lot of bubble gum fitting and compromising to get it all to work. The quad flew better than any of my previous builds and I was sold on the concept. I used OllW’s UC4H components to bring UAVCAN to the build. My reason to use Ollw’s UAVCAN was to have a build with cleaner simpler wiring and real time monitoring.
Since that build OllW has continued to refine and make UC4H an even more compelling platform for DIY builders. The FrankenSolo used 15" props and hovered for nearly 40 minutes which was much longer than the original 3DR Solo. I was tired of builds using pre-made frames that just don’t fit the components we need to use. The hole patterns never seem to be designed for any of the standard sized parts that are available. I also wanted to use 17" props to see if I could extend the flight time. I sketched an extended version of the Daya Mainplate that would support 17" props and have all the proper hole for the components I wanted to use so I would not have to cut and drill to try and get these components to fit.
This image has been resized. Click this bar to view the full image. The original image is sized 1000x774.
I found CNCmadness in Britsh Columbia Canada who advertised in RCGroups to custom make CNC carbon components. Nick at CNCMadness could make the parts I wanted if I could provide him a 2D cad drawing file of my design. I struggled for almost a year just not willing to put the time into learning the 2D cad package when I was only going to use it once. Then I contacted Nick and he said he would take the digitized image of my drawing and convert it to a cad file for a reasonable fee.
In no time Nick sent me the beautiful CNC cut carbon-foam-carbon sandwich plates for my new build.
This image has been resized. Click this bar to view the full image. The original image is sized 1000x563.
In this build I would use the next generation of OllW’s UAVCAN interface boards including ESC’s, GPS, Serial Tunnel, LEDs and Notifier and the Mavlink Bridge. Now that OllW’s designs are available from JDrones it is easier than ever to use UC4H in a build.
This build I will be using ProfiCnc’s Pixhawk 2.1 Green cube for the Solo with dual heated IMU’s.
Next: assembling the parts for the build
Posts: 1
Participants: 1
@Johnnie wrote:
Hey,
I have an CV position that i want to inject to pixhawk.
I need the ability to switch between the GPS position and CV position.
The GPS injecting is through Telem1 by GPS_INPUT (maybe GPS2 is better?)
GPS_INPUT.gps_id=2I saw that there is automatic way to choose the best GPS (by satellite number) or blended position signal (by accuracy).
But in my case i use CV position and want to give the operator the ability to change to disable it (changing to GPS position - for safety/emergency).
I am using QGC, but if there is an option in Mission Planner is also good for me.
Posts: 1
Participants: 1
@MerkaTony wrote:
Hello Mindhive,
I am at the moment on a twin gas engine project that requires Engine RPM and temperature sensing.
has anyone been able to make it work and if yes, with which sensors? I have found this article https://hackaday.io/project/20311-measuring-engine-rpm-with-the-pixhawk as also a few about the FRsky rpm sensor, but nothing complete for a pixhawk.
Does any one have an idea of how this could be done on a dual engine plane that currently utilizes hall sensors for RPM?
Posts: 1
Participants: 1
@Javier_Beringola wrote:
Hi everyone,
after connecting the drone and wait for all sensors to work fine, then connecting through NTRIP reaching RTK fix after 3D fix and float, then upload the survey mission to Pixhack Cube, I armed in loiter, then auto to start the mission. Some seconds after the first waypoint if I remember well, begun the problems as you can see in the log I attached in the link below which are Bad GPS health, bad compass health, GPS glitch etc…
Actually was the day before when all the problems begun. I was flying in loiter testing my leddar one range finder and then lost GPS signal after some minutes of flying good, then I landed in stabilize and realized the RTK Here+ had no lights on!!! lights had gone off!! Then, I disconnected the battery, back on, and worked again. Flew again and and few time later the same problem. this problem has begun after 5 or 6 good flights with this Here+ RTK GPS with good results.
I have to mention that I have already changed the Here+ RTK for my old and good M8N and works as usual, very good, so it means has nothing to do with the flight controller or whatever.
Before I contact the reseller I would like to ask the experts about this serious problem, specially @proficnc to proceed the right way.
the BIN log is here https://drive.google.com/open?id=1OQ-79MCKOJfPljxG-lwcNY1zxtqky6zL and I attached a picture of my drone so you can see the position of the GPS which is 21 cm away from the nearest motor.
https://drive.google.com/open?id=1AU-_5eqceRFH4IEPpayVlfWi8mkOJNRmthanks in advance.
Javier Beringola
Posts: 1
Participants: 1
) the last 2 log´s I found one thing:
This image has been resized. Click this bar to view the full image. The original image is sized 1000x774.
