From what you say, digital servos are OK for Arduino, but if I use the code in the servo example: myservo.write(val); is the performance affected for the lower update rate?
Regarding the grip, I have seen many designs in Internet and they use servo for the open/close function. The problem I foresee is the one I explained: when grabbing objects the servo may drain a high intensity. Do you think it would be acceptablefor the system? Because setting up finger detector or similar would be too complex for my pupils.
@SurferTim: where do those 400 Hz and 30Hz figures come from?The PPM rate into the servo is 50Hz, whether analogue or digital.
@SurferTim.Links to data sheets showing 30Hz updates, please.It's been 50Hz for at least the 30 or so years I've been using what used to be called digi-prop R/C systems.