h! guyz
i need your help,plz

i have a robotic arm and i need to modify it

wanna control the robotic arm by using the movement of the human in such a way that it follows the same pattern of human hand
and get red of using the wire to power the servo-motors
so i have to use the wirless
how can i do all that
thankx!

 

What robotic arm do you have?

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Servobotics Robotic Arm Model RA-02

 

up
help please

 

So you have the kit with the servos and controller right? Do you want to controll it through use of a PC or with an integrated system?

 

yes i have

an integrated system

 

Are those normal hobby servos? Cause if so I would geuss that the easiest way would be to get an 8 channel radio control set, modify the controller so that you can plug a ribbon cable into the side and have it connect to where all the potentiometers from the controlls connect. Then I'd make something that attaches to your arm using potentiometers with similar ranges. A good base to build this on might be an old orthopedic arm brace, the kind with a metal plate. Then use wires and springs to turn or slide the pots with the apropriate arm and hand motions. This method will cost some money, but it will work, I've modified the guts from one rc remote to work with different pots in another. My actual expertise is in mechanical systems, so if you actually want to do that I could give you some ideas about how to make the arm control. If you want more sophisticated electronics than just a modified store bought controller, someone else here would need to help with that, but the good thing about direct solutions is that they get done.

 

thankx a lot "Triode"
i need the elctronics part ....
am interest about your ideas about how to make the arm control

 

are you sure you want to make the electronics from scratch? It may cost less to buy a old 8 channel set from ebay than to start from scratch. You would still learn a lot by doing that modification. Unless your skill level is already fairly advanced it may be the way to go. If you build it yourself would you want to use a premade transmitter module at all or do you want to make that from scratch as well?

 

1-buy a old 8 channel set
good point

 

These are kind of general tips, but as someone who's only been into electronics for half a year or so myself, they'll help you with this:

-Use connectors and headers rather than soldering wires onto the board, or onto the wires in the controller. This will save you trouble later if you have to correct something, or if you want to use the transmitter or your control device with another part or another project.
-Consider adding a switch to toggle between the origonal pots and yours rather than cutting the old pots out of the system, this way when you debug you can use the origonal joysticks and dials to help narrow down what the problem could be if the controlls aren't working right, and you can use the set for other things later on.

 

i will consider these things... from your view
"Triode" thanks a lot
what is your comment on the servo motors? coz you know that we have to take in the effect of the gravity?

 

by that do you mean that the servos might have a hard time holding up the robotic arm? I would guess that it has been designed to work with the servos provided. It should have some counterweighting. Most robotic arms have counterweigting at the base of the boom, or shoulder, in terms of a human arm. And the larger ones sometimes have it at the "elbow" as well. Do you have the arm working with its normal controller?

 

i don't know about the counterweighting ...
i thought that we have to work on

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