How to stop servos from locking up?

[Shogun Gunshow]

When I throw together a bare bones command pod + electric batteries and throw servos onto it, it works.

As soon as I attach a hinge or a Modular Girder Segment to it, though, it refuses to transverse. It shudders a little bit when the target angle passes its current angle, but otherwise stays locked in place.

I've tried seeing if it's an autostrut issue, but it doesn't seem like it. Tries powering and unpowering motors - nada. Lock and unlock - same deal. I have more than enough power... I don't get it. Is there something obvious I'm missing?

[bewing]

Are you using any mods, such as KJR?

 

[Superfluous J]

I have sent a vessel with 2 hinges and a piston to Mun to land, in JNSQ so everything's a bit bigger. It not only lifted off Kerbin with no issues, but landed on Mun, returned to orbit, and landed again with no problems. I didn't slam it around or anything but I wasn't particularly graceful either.

What's your launch TWR and how many gees do you tend to get when this happens?

[Shogun Gunshow]

1 hour ago, bewing said:

Are you using any mods, such as KJR?

 

I am using mods. Ferram, Firespitter, KAS, Mechjeb, Interstellar, TAC life support, K&K planetary building, Airplane Plus, and Tweakscale.

I found the issue. It was KerbalJointReinforcement. Removing that allowed my rover arms to start articulating properly.