It's possible that particular servo has been set to improper limits on it's travel. In the "Init" file for the standard initialization of a JD robot are a few script commands concerning setting the limits of travel of some of the servos. None of them include the upper leg servo you are having problems with, however, if there is some sort of min-max setting somewhere else in your project this could be the problem. It might look something like this:

# Right Upper Leg
SetServoMin(d16, 1)
SetServoMax(d16, 135)

Such settings would cause your problem.

I'm not saying this IS the problem, just that it's a possibility.

If the servo is binding somehow, there would probably be some buzzing involved, perhaps fairly loud.

Also, I see from your picture that it looks like the wire for the right foot is just a bit under the left foot.

steve g

i missed your last answer.yes i meant the servo profile.

@nomad.

That's cool. I thought that was what you meant. No worries.

I think the problem with JD's servo is in the hardware. Nothing has worked my problem is unresolved, I think I must buy a new servo.

One last question just to be sure. With JD turned off so that you can move the servos easily, can you move the leg all the way up, by hand, then?

If the servo was like that when you got it, you can file a warrenty claim for a replacement. Use the Contact Us link, select warrenty, and leave a brief discription of the problem along with a reference to this thread.