Results 1 to 2 of 2

Thread: Hobby servo motor precision?

  1. #1
    Junior Member Newbie
    Join Date
    Sep 2009
    Posts
    3

    Question Hobby servo motor precision?

    Hi
    I have a ranging sensor mounted on a HiTec HS-311 servo. I have done some programming to take readings every 5 degrees using Arduino's Servo library. My question is, does the servo precisely orient to 15 deg when i ask it to? Because from what i've seen, 0 deg doesn't at all seem like 0 deg. Also 180 deg doesn't at all seem like 180 deg. Only 90deg seems precise.

  2. #2
    Administrator T-1000 vikas's Avatar
    Join Date
    Feb 2004
    Location
    Delhi
    Posts
    1,922
    Blog Entries
    14

    Default

    The precision of a servo depends on it's electronics. Most servo's use a simple potentiometer for feedback, so they are not usually completely linear. Most also have a certain amount of play in the gears, and accuracy goes down with age.Also the driving PWM plays a factor too. And repeated twice the same angle will not be the same exactly due to errors due the above mentioned factors.

    You can improve it though

    http://www.geology.smu.edu/~dpa-www/...o/servohac.htm
    Or adding other form of external feedback.
    Vikas Patial

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •