Dedicated to the exchange of useful information between members using the Arduino or other families of processors for autonomous rovers.
Hi All,
Before posting an issue or a problem in the ArduRover Discussion Forum, please check the wiki table of contents, review the firmware release notes in the subforum, and search that subforum for existing answers to your question. Help avoid duplicate threads by finding other members with the same issue and their solution.
When formulating your post, use a descriptive title such as "rover will not navigate to waypoints in the Auto mode" (not "HELP!" or "Problem").
Please include the following information to help diagnose your query:
TCIII
You need to be a member of diydrones to add comments!
Comments are closed.
Hi, i am looking to build a new rover, but i need some advice on the chassis. I like the 4wd chassis/tank look and prefer it over the crawler/rc look.are those any good though? most people recommend crawlers.I am looking to get something from banggood, any advice will be highly appreciated. thanks
Read more…Hi all, I have a skid steer robot using a pixhawk cube, one 1x15 roboclaw motor controller and a dagu wild thumper 4 wheel chassis. I have skid steering working so far, testing motor c and motor d tests works as described and the vehicle can be controlled in manual mode. However, upon using any mode other than manual mode the rover wants to shake and pivot on the spot, and it seems the steering PID controller oscillates and these oscillations get larger. i have tried everything but it is still…
Read more…Hi,I have converted a Traxxas X-Maxx into a rover using the Pixhawk Cube 2 controller kit with a Here GNSS.I swapped out the original X-Maxx remote controller for an X6R receiver and Taranis QX7 radio.latest version of ArduRover firmware installed as of 8/11/18. The rover has an EZRun Max6 ESC. The problem now is the ESC control over the transition into reverse. The ESC is currently set to it's Running Mode Option 2: "Forward/Reverse with Break", AKA the "Double Click Method".What this mode…
Read more…Hi all.I know this is an Adurover group, but Thought I would reach out and try my odds for some help as I'm perplexed by this problem. I have a Traxxas X-Maxx set up with a Pixhawk Cube 2.1 and the Here GPS. I'm using a Tarranis X7 remote controller and a X8R Sbus Receiver. I'm using QGroundControl with the latest, Pixhawk 1.8.0 Firmware with the Generic Rover airframe profile installed. As instructed, I have Steering servo wired into Main 2 and Throttle ESC wired into Main 4. Sensors are…
Read more…
Comments
@Jared,
Wow! That's a unique set of wheels! So all four wheels are independently powered? I'm using a 2X15 A roboclaw (2 channels), so each set of 3 wheels is driven from a single motor on each side.
I designed and built my platform, and now I will design and program it for autonomous (robomagellan) moves.
Alan KM6VV
@KM6VV
For motor control I'm using two SABERTOOTH 2X25 V2. They are capable of providing two DC brushed motors with 25A continuous current in the voltage range from 6-30V. Awesome feature is the regenerative braking, that feeds energy back into the battery on deceleration.
Some videos of the robot: https://www.youtube.com/watch?v=uIqxaYnlYOM and https://www.youtube.com/watch?v=u3vQKYAOqeE (the guys in the vids designed and built the platform, now my task is to get it to an autonomous stage.)
@John,
Nice work. I have noticed the low frequency jitter in the steering also, but it seemed to average out to zero so it did not appear to have any real affect on the steering in general. However, I plan to be testing today and will try a D setting of 0 to see if the jitter goes away.
Also, you might want to experiment with HDNG2STEER_P and XTRK_GAIN_SC.
You might try increasing HDNG2STEER_P to .9 or slightly more and XTRK_GAIN_SC to 140.
Regards,
TCIII
@ John
What PID are you talking about? Heading2Steer ?
Could you please post your all values?
And what APM are you using?
Thank you.
Regrads.
MV
I have been testing my slash based rover for a few weeks now. One issue that I had was significant oscillation in the steering control (turning quickly left and right). Today I tried setting the D (derivative) of the two steering PID control loops to zero. Instantly the problem was solved. It is way better. Then I slightly increased the P and I and it is better still. This is starting from default settings. It is not often that I see a huge and immediate improvement from such a simple change. It was awesome to see my rover behaving exactly the way I thought it should.
@Jared,
That's about what I'm doing. S.L.O.W.L.Y learning ROS. What are you using to drive your 'bot? I'm using a roboclaw dual motor controller, and I do use an Arduino "in between" along with (for now) an APM.
I want to migrate all GPS, LiDAR, IMU, ultrasonic sensors up the the mini-ITX, but I'll keep the wheel encoders connected to the roboclaw.
For a while, the APM can talk to the Arduino and motor controller, and run the 'bot.
Alan KM6VV
Thanks Chris,
The project I'm working on is to make a robotic platform autonomous, the platform has a SBC(running ROS and Ubuntu 12.04). I've only just come into the project so trying to get my head around the system, and learn ROS. Basically I would like to have APM functionality but I'm not using servo motors...
Anyone Done something like this?
Jared,
It depends on what data you want to get out of it. If you want full autopilot functionality, you're better off with APM 2.5. ArduIMU is an older product and is no longer being actively developed.
But if you just want attitude data, ArduIMU works fine.
Hi Group,
I'm new to all this, I have a APM 2.5, is it possible to use it as an IMU like the ArduIMU or am I better off just buying the ArduIMU?
I have been testing my Slash rover with the latest ArduRover2 v2.24b code and the consistence of the waypoint tracking is exceptionally good. Tridge and I have been working on speed control, which can be done in the Mission Planner, at various points on my vehicle test course here in Florida. The object is to get the rover to have the fastest average time possible through the test course which can be translated to the actual AVC course performance.
Regards,
TCIII
-
31
-
32
-
33
-
34
-
35
of 97 Next