Society of Robots - Robot Forum
Mechanics and Construction => Mechanics and Construction => Topic started by: TheDude89 on December 04, 2007, 04:08:11 PM
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Hello everyone, I'm new here and new to all this. I have a project to build a robotic arm and it has to be on a car like thing. I'm planning to use a remote controller to make it easier.. But i need some help. I've bought some servers a transmitter and receiver. I just need help on building. Thanks ;D
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okay first things first how many servos do you have and how many channels on your receiver.
next for the RC car part go out and buy a cheap RC car and use it as the base.
then you can use the servos for your robotic arm.
also how many degrees of movement do you want ( base, wrist, elbow )
then look at this page
http://www.societyofrobots.com/robot_arm_calculator.shtml
it calculates the force needed to make the arm move.
PS. what is your budget
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First, Thanks for the quick reply :D.
I have 6 servos and I'm not sure how many channels are on my transmitter.. I think it only has 1... not that sure because I bought from eBay. But i have 3 receivers and 2 have 4 channels and the other has only 1.
Also, how do i know what kind of RC car to buy?
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you will probably only need 1 4ch receiver and 4 servos.
for the RC car if you buy it you will probably use it as is only take off the flashy casing. so you don't need to mod the chasi. which car is up to you do you want more torque or more speed.
also how much was all the receiver and servos on ebay.
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All together with 6 servos 3 receivers and a transmitter it was $20.00 + S+H
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Hello again, I'm still brand new with robotics and i need help choosing a microcontroller. Something, that is user friendly (if any). If your wondering what I'm going to do.. I'm trying to create a teleoperation from http://www.societyofrobots.com/remote_control_robot.shtml.
Thanks ;D
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wow that great
(if they work)
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what will your chassis be controlled by, a second transmitter???
Can you please provide the link to your ebay bid ( so we can see the details bout it)
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You can't beat PICAXE for price and ease of use!
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he should just use the transmitter that comes with the car
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Also, how do i know what kind of RC car to buy
Get a good quality one. The cheap ones aren't designed to last very long, and have very poor torque.
If its between $50-$150, its probably good, but research it anyway for how much it can carry/torque/etc.
You probably want an RC truck so it has enough room to mount your robot arm and additional electronics. If you can mount a platform on it, even better.
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I'm planning to hook up the receiver to a microcontroller to control the chassis. Also the link is http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEBTOX:IT&item=110196037046&_trksid=p3984.cTODAY.m238.lVI
Another question.. what kind of microcontroller should I get?
Thanks for all the help! ;D
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okay i thought you wanted to make an rc
so for the chasi just make the $50 robot with a new chasi
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Ok, but I dont want an automated robot.. Is there a way to hook that up to a transmitter?
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then why do you want a microcontroller
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if you're going to be controlling it, you're not gonna need a microcontroller
servo's connect straight to receiver
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fyi all, TheDude89 wants something teleoperational, meaning he sends the robot upper level commands.
For example, he tells the arm to reach at coordinates x, y, z, and then the arm figures out all the joint angles automatically with the microcontroller. He doesn't want to control each individual joint - too much effort!
I don't endorse any microcontrollers out there because I have complaints for each . . . however, check this post out (its been asked a million times already):
http://www.societyofrobots.com/robotforum/index.php?topic=2524.0
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Yeah thanks for the clarification.
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I really don't know what I am doing and I really need help.. I don't want to buy the wrong microcontroller.. As said above I want something teleoperational. Thanks! Sorry, I don't know much about this stuff :'(.
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Like the title says ;D I need a microcontroller! I don't have any opinions on any of them.. I just want it to do the job! So please if you know of any beginner microcontrollers that can do what i need post below!Also, I'm new to this so I may need some help on programming, programs to program, etc. Thanks ;D
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the atmega8 from the $50 robot tutorial seems pretty simply
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Do you know how to program a teleopertaional or where i can learn?
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You will need more than a microcontroller to make a teleoperational robot... you will need vision capability so you can see what your robot is doing... check out roborealm.com and their tutorials
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Hmm.. But, why would I need to see my robot?
Also, I have purchased a ATMega168 microcontroller
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I'm planning to hook up the receiver to a microcontroller to control the chassis. Also the link is http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEBTOX:IT&item=110196037046&_trksid=p3984.cTODAY.m238.lVI
Another question.. what kind of microcontroller should I get?
Thanks for all the help! ;D
omg, that thing is like 20 years old :o
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Lol, it still works though :P
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Any tips on how i can program a teleoperational?
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teleoperational means you'll have a camera on your robot, and you'll be able to control it from somewhere else (behind your PC)
Since you say you don't need a camera, you mean RC, not teleoperational. (RC= Remote controlled, RC is like all other toys...)
That's why others were confused a bit.
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not exactly, Rebelgium.
There are three levels of control:
1) RC
2) Teleop (semi-autonomous)
3) Fully Autonomous
Teleoperational means that it is partly RC, and partly autonomous.
For example, think of a robot hexapod. There ain't no way in robots heaven you can control 6 legs (~18 joints) with a dual joystick RC controller. So teleop takes that directional control from the RC remote and converts it into the proper leg kinematics, requiring a microcontroller in between. You can have a camera on any level of robot control, but its most useful on RC.
I'm under the assumption TheDude89 wants to teleop the arm of the robot, right? Or just RC?
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Just the RC, and thanks for the clarification again ;D
Omg.. The "microcontroller" i ordered turned out to be a microchip >:(
I ordered an Arduino, and im trying to firgure out how to make create a teleoperational for the chassis.. any tips?
Thanks ;D