Another AGV
@ July 16, 2010
- Actuators / output devices: Johnson 250 Motor
- Control method: Arduino
- Power source: 7.4v, 2s Lipo battery
- Programming language: C/ C++
- Sensors / input devices: None as of this moment
- Target environment: Maybe slightly rocky ground, Flat areas
This is an AGV or Autonoumous Ground Vehicle. I bought the RC car before even seeing that patrickmccabe was way ahead of me on designing and implementing an autonomous arduino controled vehicle :D. Anyway, so far I have removed the stock motor and fit in a Johnson 250 motor. All I had to do was grind off an annoying piece of plastic to fit in the new and some what longer motor. I am not sure what to do with the steering as it is a very rudementary control, it is either all the way left or all the way right and when it is not turning it centers for going straight. I think that I will leave it as is for simplicity's sake. More info is forth coming as I build this thing.
-UPDTATE- I noticed that the motor was skipping
so I hot glued it into the motor housing. It's going
slowly as I have been really busy recently but it
should speed up this week.
-UPDATE- (finally :P)
I finally got around to attatching leads to the steering motor and was able to hook it up to a SN754410NE motor driver. Wipped up some simple left/ right turning code and tried it all out. I am happy to say that It works beautifully. I ended up using the two cell lipo to power the motor itself as the arduino couldn't supply what I needed. More to come soon.
@ Mon, 2010-07-19 02:37
Yeah
You can control brushless escs with a servo command but a brushless esc won't work with a brushed motor. Thats all I'm saying. Have a wonderful day :D
@ Mon, 2010-07-19 03:22
Ah ok good to know, mine has
Ah ok good to know, mine has 2 wires,so I imagine that it's a brushless,than esc should work with servo commands if I got it right.
Thanks for your time my friend and have a good day too :D
@ Mon, 2010-07-19 03:31
2 wires = brushed.
2 wires = brushed.
@ Sun, 2010-07-18 11:29
wait, then cant we control
wait, then cant we control brushless ESC's with servo commands in picaxe
@ Sun, 2010-07-18 07:52
One thing I forgot to mention
Assuming that you have a regular motor with two wires, make sure that it is a brushed esc. The brushless escs cost much more and have three motor wires. Have fun, I know that i am having a great time building this.
@ Sat, 2010-07-17 23:30
Great my friend,I will look
Great my friend,I will look forward to get some ESCs. I can imagine that I have to use the same servo commands for my picaxe 28x1. Good to know thanks and keep it up. :D
@ Sat, 2010-07-17 07:33
Vary the Speed
If you want to vary the speed of your motor an ESC is what you want. I takes commands like a servo and outputs a pwm pulse to the motor to vary its speed. Its what that little black thing is that is attached to my motor wires in the main photo :D Any way thats, in my opinion, the easiest way to control a motor. They don't cost much ,only a few bucks as they became "old technology" when the brushless motor came into circulation.
@ Fri, 2010-07-16 16:36
Hi, I have a few of them
Hi, I have a few of them too and still don't know what to do with steering,I was thinking of replacing the little motor with a servo but still have to fit it inside. Beside that I wish I could vary the speed because it's too fast and hard to fit and program a distance sensor. I'm still reading comments and new post.