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ArduRover User Group

Dedicated to the exchange of useful information between members using the Arduino or other families of processors for autonomous rovers.

Members: 401
Latest Activity: 6 hours ago

Before Posting an Issue

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:

  • Describe the problem you are having. What is the expected verses the observed behavior?
  • Provide hardware information such as the brand and version of your autopilot, GPS, radio, and compass, as well as any other pertinent details about your rover setup.
  • What version of the APM: ArdurRover2 firmware version are you running?
  • For navigation issues, provide your tlog and/or dataflash log. Click here for instructions on retrieving a dataflash log.

TCIII

Discussion Forum

Contributing to giving sight to AV's

Started by RoboBill. Last reply by RoboBill 6 hours ago. 56 Replies

Hello everyone,I'm trying to design and build an "open source" radar system. The premise is that while we have the hacked Neato and the RoboPeak system, I've not found anything for outdoor use. So…Continue

APM:Rover Questions

Started by Nakia Brewer. Last reply by Nakia Brewer on Wednesday. 5 Replies

Howdy all,I am currently building an RC/Autonomous Mower and have some questions I could use some help with.Currently I have the mower fabrication complete and as of yesterday I have the mower…Continue

To Start Rover

Started by yuvraj. Last reply by yuvraj on Monday. 8 Replies

How to start make an autonomous rover so what i need about the components please explain me sir so that i can start my work. so please provide me a which type of transmitter an receiver or any other…Continue

using the rover as a auto sentry with audio and video?

Started by mark sahf. Last reply by mark sahf Jan 23. 2 Replies

Has anyone made the rover into a roving security system? I have hacked Roomba and reprogramed with a tether I make then removed parts not needed and added security items and programed it to guard the…Continue

Comment Wall

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Comment by Mike Wilson on May 17, 2013 at 6:08am

Hi guys,

I'm looking for the best way to setup 4 wheel steering with the APM.  My Traxxas e-Maxx is setup with 4 servos and I understand that the standard APM code only has a single output for steering.  There are lots of spare outputs so I don't think it would be too difficult to add code to mix PWM signals and invert them for the rear steering.  Has anyone already done this?  I would prefer not to have to use an external mixer.  Since the new APM code supports Skid Steering, could the skid steering output be used somehow?

 

....Mike

Comment by Greg O on May 16, 2013 at 1:29pm
The CEN GST can also be gotten used for fairly cheap (under 200) and is built like a tank. It's a nitro truck but has brushless conversions. Has a ton of internal space if you add a roll cage or bar to it. This is what I'm going to base my rover on when I start my build. After seeing the great process, its making me want to get this going.
Comment by Bot Thoughts on May 16, 2013 at 1:16pm

FYI, RedCat Racing, ExceedRC, and a couple of other brands carry some of the same models. Do a bit of research on durability. I have seen folks post that they like RedCat; it's not clear to me if the models are identical or if there are differences in plastic or what. Just read up on the RC sites.

Comment by John Moore on May 16, 2013 at 7:58am

@Kabir,

Another platform to consider is the RedCat Racing (www.redcatracing.com).  My buddy is running a cheep rock crawler which he paid $150 for which perfoms really well.

Another one I considered was the 1/8 scale MaxStone crawler by exceed found at www.nitrorcx.com

John

Comment by Bot Thoughts on May 15, 2013 at 6:06pm

@Kabir - to get a "hobby grade" RC vehicle, you will need to spend at least $100. But you can get something good for under $200.

I have an ExceedRC Sunfire 4x4 buggy I got as a used roller for $60. For on road, probably ok. Off-road, suspension is absolutely terrible. Mixed bag; you'll probably buy it and want something better at some point.

Far better value can be had at the $150 and up price point. I and many others love ECX RTR kits. They are known to be very durable, low cost, easily upgradeable. ultimaterc.com has a whole sub-forum devoted to them where you can learn everything.

My rover, Data Bus, is based on an ECX Circuit. I've crashed and rolled and flipped, and just beat the snot out of it for the last three years. It's been running a brushless setup for the last two. I've only broken/bent a few items in extreme collisions and all the parts are dirt cheap. They now come with a 2.4GHz radio. The suspension is good, can be upgraded, gearing, motor, esc, all upgradeable. But in stock form it's quite usable.

I don't have personal experience with Duratrax but worth looking at. That brand has been around awhile and has some following. They have at least one entry level stadium truck you could go with that isn't too costly.

Helion is Hobbytown USA's house brand, but carefully check into these for durability, check ultimaterc.com reviews, etc. I don't have personal experience with them.

I also picked up an Ofna Hyper10TT 4wd truggy roller for $150 + $130 for a nice big Tekin motor, and a small sum of $40 for a HobbyKing ESC. This is a fine RC truck, high quality suspension, excellent shocks, aluminum chassis, etc.

For awhile I had an Ofna JL10E which I put together for something like $200? I just stuck a Traxxas Titan12T and XL5 ESC on it. Ran fine on the street but very little clearance. Also a quality machine.

Spend some time on rctech.net, ultimaterc.com, or rcgroups.com, look for used deals if you want, or just learn about different new options.

Hope this helps.


Admin
Comment by Thomas J Coyle III on May 15, 2013 at 9:02am

@Kabir,

I have found that you get what you pay for in the quality of rovers. I use Traxxas truck chassis. I built my first Traxxas E-Maxx chassis from new parts off of eBay for about $400 USD. My AVC Traxxas Slash rover started at a "roller chassis" for $88 USD, but you have to add a motor, ESC, servo, receiver, wheels, and a battery to get it up and running.

The cheaper chassis will usually not last as long and will break fast nickel and diming you with part replacements.

Check out this thread: http://www.diydrones.com/group/ardurover-user-group/forum/topics/wh...

Regards,

TCIII

Comment by Kabir on May 15, 2013 at 8:55am

Guys, what would be a good ArduRover platform sub $100 if I don't want build one myself?


Admin
Comment by Thomas J Coyle III on May 15, 2013 at 8:45am

@Pooja,

I am presently using the stock PID settings. Each rover will be different so it is hard to generalize.

Regards,

TCIII


Admin
Comment by Thomas J Coyle III on May 13, 2013 at 2:15pm

@MVeloso,

Yes, that is correct. However, CRUISE_SPEED is in meters/sec. Also, CRUISE_THROTTLE, in percent, sets the base throttle percentage, which is an estimate, to reach the mission cruise speed (CRUISE_SPEED). If you want fast vehicle performance it is best to keep SPEED_TURN_DIST around 2 meters and SPEED_TURN_GAIN around 50% or greater. My rover can go through the curves at 5 m/s so I have the SPEED_TURN_GAIN set at 75 - 100% with a CRUISE_SPEED of 5 m/sec.

Regards,

TCIII

Comment by MVeloso on May 13, 2013 at 1:08pm

Thank you Thomas.

You mean SPEED_TURN_DIST and SPEED_TURN_GAIN .

 SPEED_TURN_DIST is 3 m  and the SPEED_TURN_GAIN 35%

And I reduced CRUISE_SPEED to 55 %.

 

 

Regards.

 

MV

 
 
 

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