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Thanks btrueblood. Ideally, I want constant downward velocity. I will probably throw in some accelerations to test robustness of the control system.

Thanks Mike. I will need to bring the pendulum to the ground and not the ground to the pendulum. There really won't be much swinging action. The pendulum will be falling, so damping will need to come mainly from the translating actuators. The goal will be to damp out dynamics in the ball that...

Thanks MikeHalloran and zekeman. I will try to clarify the project more. The pendulum will start out at a predetermined position relatively high above the ground. After it is released, the goal is to have a control system to actuate the actuators on each axis and get the pendulum to land...

Thanks unclesyd- Precision is not too important, maybe to within an eighth of an inch or less. The x and y axes need a maximum speed of 4 in/sec while the z axis needs a maximum speed of 8 in/sec. The axes will move at different rates defined by the controller. The goal is to define some...

Need help building a large xyz table to study pendulum motion. The setup would be similar to a large gantry system. Each axis needs to be 3 ft long. The pendulum would be 10 lbs or so and would hang off the vertical z axis. All three axes need to be able to move at the same time between 4...