This might help:
http://www.mycncuk.com/forums/router...-rs-485-a.html

Although I think you're not far off getting the current version working as it looks like just a scaling issue.

Quote Originally Posted by cncJim View Post
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Make sure you clean the collet before putting it in the spindle. In the picture there's wood dust inside the collet. This is a quick way to damage the spindle taper and increase runout...