Servo Question
 

Hi Guys,

I'm hoping someone can help with some advice on servos.

I bought two new, supposedly identical, servos as elevon actuators for an Avonds Rafale.

The problem is: the servo arm on one servo can be rotated by hand very smoothly with little effort. However, the other servo offers much more resistance and is almost impossible to move by hand. This "test" is performed with no electrical power.

Both servos appear to operate identically when powered (e.g. travel ranges and speed) and both appear to draw the same amount of current. Both servos are Futaba 9202.

Has anyone ever experienced two identical servos acting like this? Is there a problem or is the difference due to normal to manufacturing variation (say in material choice or lubricant maybe)?

Thanks in advance....

RE: Servo Question
 

Ok, I use those often in my helicopters. Never have I noticed a difference of resistance to motion on them, and often it is necessary to move them by hand during the preflight, so I 'feel' them often. They are resistant to motion by hand, but all of them are the same. Since your idea of resistance and my idea of resistance is subjective, I suggest you find another pair, as one of those servos is not right.
Jack