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how do I do a simple scan?

I am an experienced programmer but never used a scanning head, I currently got employed by a company with a nice scanning head and want to scan this big gear insert for profile but I am having a hard time figuring this out. I kind of thought it would be as simple as selecting the cad area to be scanned and clicking create but its proving to be not that easy... unless I am missing something, which I am sure I am...

Any scanning wizards out there?