what kind of sensor and how to put it on arm joint

Other Hardware Sensors
1

hi :slight_smile:

i'm a beginner here and also in robotic world.
please kindly guide me, what kind of sensor i have to add and where should i put those sensors on each joint?

i mean, i want to "teach" the arm like this short video on this teaching arm video on youtube.
basically, i have 6 digital servo which is told they can return the value of the angle position, something like 4096 or 360/4096. i'm not sure about this. perhaps if i give a command such:

servo1.writemicrosecond(1000)

it will go to certain angle of 360/4096.

but that's from coding/programming side.

what i want to know is, i want to move the arm by my hand, so i will record the angle position of those 6 servo.

i think servo1.read only read the last value. so if i move the arm by my hand, i really don't have any idea what to do with arduino or what command should i use or what sensor should i use, to capture the recent/current value of the angle position.

i've googling alot, it seems easy but not for me. ::slight_smile:
i've searching through youtube but i don't have any idea if they put any additional sensor on each joint so arduino can read the current angle position.

please kindly give me a direction.
any other sensor should i put on each joint?
or simply just query the servo?
thx in advance :slight_smile:

2

Replace you servos with something like this:Servo with feedback.

Paul

3

thanks paul for giving me the direction and clear path.
an analog feedback... it will be very handy beside the digital one.

thanks... i'll catch that servo trick :smiley: