Ok, I have been cutting some knotty pine. My problem is that the z axis will rebound about .125 when a v bit or a endmill hits a knot. Not every time but often. 12,000rpm, 80 inches per minute. I was running 100 and slowed it down last week. Because I thought it would help with this issue. Today I noticed the bit would spin in the collet with the collet tight. So, I am ordering a new collet but was wondering if there is some sort of mechanical tension adjustment on the z axis of a Shopbot? Any advice you can give would be appreciated.
" Life is hard when your dumb" John Wayne