Hi All,

I'm fortunate enough never to have had a servo failure (yet) and I'm wondering what is the most frequent type of failure i.e. do they mostly seize, do they just stop working but the servo arm remains free to move, half and half or something eles?


I ask the question in the context of dual servos driving a one piece elevator. It's possible to create a 'sliding bar' mechanism so that if one servo seizes the other will still give a degree of elevator control. However, if a servo fails but does not seize, then the amount of remaining control is dramatically reduced as the 'failed' servo cancels out much of the movement in the functioning servo i.e. there's nothing solid for the functioning servo to push against.

I don't want to open up a new debate re 'redundancy'! I want to understand better than I do what happens to servos when they fail.

Thanks for any insights

Bob