Of the 19 belleville washers that provide the spring tension to hold the tool holder in the spindle, there was only 18 installed and over half of them were broken.
#406 always seemed to be very touching when it came to trying to prevent the tool form chattering. When cutting a part, it would seemingly enter into a rage of tooling distress almost entirely at random. By the time I could react with the speed and feed override controls, the chatter would go away also most as fast as it came to be. It is as if the chatter was lying and waiting for an opportunity to strike and cause me grief. This wouldn't happen at times when you would expect it the chatter, like entering a tight corner in a pocket or changing direction. No, it would be along nice straight even cuts and never did is seem to happen in the same area of the table.
With the help of the guys at cnczone.com , we got it fixed and the machine runs nice a smooth now.....at least during the test cuts that were done. However, I am sure I haven't heard the last of the chatter.....
