Hi, I have a question regarding the inverse kinematics using KDL. I would like to use carttojnt of the inverse kinematics solver. The problem is I have to use a destination frame as input. I'm using something similar to a elbow manipulator so you can imagine I only want a reference position. The arm only can have 2 poses to a reference position, to get the rotational part of the frame I actually have to get the joint positions to calculate it (correct me if I'm wrong). So 1. Am I right? 2. Could I use KDL to compute the IK or should I use an analytic solution? Thanks in advance. Jeroen http://www1bpt.bridgeport.edu/~risc/html/proj/damir/img00015.gif