Hello.
As you can see, GIF is a poor format for photos. It only allows 256 different colors. I recommend using JPG instead, as you have done on Flickr. For diagrams and charts, GIF is ok but PNG looks nicer because it is lossless. Also, I think you don’t need to post multiple sizes of the same photo; I was confused at first until I realized that’s what you had done.
Your latest pictures and explanation of your setup all look good. The red line you drew on the graph looks good. However, the blue line is incorrect because I made it based on data from your first post where you had the wiring wrong. (I think the blue line in that graph is actually the reading on the X axis, not the Z axis; I would expect to see random looking noise like that on the X axis but I’m not sure about the magnitude.)
Now that you have fixed your wiring, could you try again and post the new data? Please post readings from both the X and the Z axes. I don’t have Microsoft Excel; if you just post a CSV file that would be fine.
If the new data doesn’t look good, you could try taking the Wixel and Maestro out of the system and just measure the gyro outputs with a multimeter while turning the gyro with your hand. We have some general trouble-shooting tips in this post: Read Before You Post: General Advice for Getting Help.
–David