Hi guys!
just an advice: do exist servos with integrated encoder?
I need to know when a movement (in 0-180°) is actually terminated.
Thanks a lot, Valerio
Servos use a pot position feedback for the driver, you could possibly measure the wiper voltage using the ADC on an arduino to get the absolute position.
You'd need to take the servo apart to get at the pot.
I have seen encoders that you mount to the shaft of the servo to provide that position feedback.
example:
One could also modify the servo to read that position directly - here's a link showing how to do that with an arduino to monitor the position.
http://forums.trossenrobotics.com/tutorials/how-to-diy-128/get-position-feedback-from-a-standard-hobby-servo-3279/
Below is how I connected to a servo pot wiper.
Guess that works too.
What kind of readings do you get from it?
The voltage being supplied to the pot in the servo was 2.0v, so the voltage range on the wiper was 2.0v to 0.0v. To get a full range value output from the ssc-32 I was using, I had to 2.0v as the ssc-32 analog reference voltage. Some more info below.
http://www.lynxmotion.net/viewtopic.php?f=2&t=2748
http://www.lynxmotion.net/viewtopic.php?f=31&t=3182