On Thu, 6 Oct 2011 07:21:37 -0700 (PDT), Rosie
wrote:

My CNC Cincinnati Hawk 150 started to make a big noise/vibration while
Part-off. I make the machine turn counterclockwise with the tool
upside down. Somebody told me the problem could be (this is only a
possibility) the ways are worn because it's not a normal/good practice
to use the CNC that way for Part-off.

What do you think about ?
Has somebody had this problem?
What do you suggest, changing the ways is a very expensive test to do,
I have a small machine shop and I need this machine for my biggest
customer.

Thanks very much

The chips clear really nice running CCW upside down IF your machine is
rigid enough.

Mine wasn't, I have to run CW right side up.

I've also seen materials where you have to INCREASE the feed to power
through the chatter point. its a kind of resonance thing.

Just a couple ideas. look at Tim's post too.

Karl