[Jim Wagner]

Hi Martin,

We are implementing this exact control probably within the next few days, we will be happy to share our experience with you. Sounds like you will have a similar control as we have, a pot with a motor. We will also have a 10 turn pot as feedback.

However, you also mentioned in your posting that you had hunting issues while tracking a target with the camara. We experienced this as well and found that the apparent hunting was due to a slow response of our control loop. We are using the target tracking example provided by WPI for Labview. And we found that although the fps of the camera was set to 30 initially, the actual fps was about 3, therefore an undersireable 330ms delay existed in our loop response. When we decreased the image resolution, the fps increased by a factor of 2 to between 6 and 8 fps, this resulted in a more acceptable (not noticable) loop response of about 120ms. We are in the process of determining how we can speed up the camera image processing to avoid this. If you have any info in this area, it would be greatly appreciated.

jim