Hi,
I have just gotten my Shopbot setup and running finally (bought a used 2004 PRT Alpha w/3hp Spindle last month). I was cutting a piece with some really nice curves (move speed 1.0, spindle 13000) using a 1/4" bit and the wood is Bradford Pear. The straight cuts were fine but any curves had chatter and you could feel the chatter on the machine.
Any ideas what would cause this? I've called the tech support team quite a bit lately and figured I would come here first this time.
Thanks for any help.