Comments

• 

  Mike Wilson May 17, 2013 at 9:34am

  @John Moore,

   

  The problem is I need to drive the rear servos in the opposite direction and also at a different steering ratio. I use only 40% on the rear wheels.

  Mike
• Developer

  Kabir May 17, 2013 at 8:19am

  Thanks for all the suggestions guys :)

  I loved NitroRCX  cars, especially at that price but they don't ship to India. Is any kind soul willing to drop-ship for me?

  Kabir
• 

  Mike Wilson 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
• 

  Bot Thoughts 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.
• 

  Bot Thoughts 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.
• Developer

  Kabir May 15, 2013 at 8:55am

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

  MVeloso 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
• 

  MVeloso May 13, 2013 at 8:51am

  Testing ArduRover v 2.41 AR2

  My Rover:

  
  1/10 buggy chassis LRP S10
  Motor: S2838-2800 Brushless Inrunner (2800kv) from Hobby King.
  Esc : 40Amp for aircraft.

  
  APM 1 with HMC5883L - Triple Axis Magnetometer and 3DR GPS uBlox LEA-6
  Firmware : ArduRover v 2.41 AR2.

  I began the tests with the old GPS MediaTek but soon realized that I had to change to the new model. The precision is much better with the Ubox LEA-6.
  This was the first conclusion.

  
  I noticed a difference with the saved WPoints on the ground and the points on the Mission Planner. There is a difference approximately up to 2,5 meters.

  
  For an aircraft it is nothing but for a ground vehicle has some relevance.
  So, taking into account we are working with civilian stuff I guess we can not improved the precision programming via MP.

  
  So to increase the precision I introduced the difference( kind of drift) between the point where the Rover turns and the point recorded on MP.

  
  I noticed that the speed of the vehicle is decreasing loop(turn) after loop.
  So that is my short report.

  
  And the video:

  https://www.youtube.com/watch?v=5lSX4837gPg&feature=youtu.be

  Regards.

  MV
• 

  Joshua Ott May 8, 2013 at 2:48pm

  Alan, that sounds like it was the old store. We have just taken it off line. Will you verify that you are on the new store: http://store.3drobotics.com/
• T3

  healthyfatboy April 29, 2013 at 7:31pm

  Since he's using a uBlox, he can only go down so far. Since your GPS seems to be able to get 20cm accuracy, you're really the only one that can test whether a 0.1 m would work well as it will be difficult for any of us to test that out.