GeneT
Active member
This from tonight. Measurements were all great. +/-.001 of what I wanted. Shoulder sucks. Threads still need to be cleaner looking. Critiques please.
Looks like you've got a bit of chatter going on. Chatter results when you set up some harmonic with flex in the system. Meaning it could be lots of things. It might be that you're taking too much material at a pass - even early on - once chatter starts subsequent passes will tend to follow it. It might be that you have the threading tool sticking out too far. (if it's poking out much, you might think about a fatter shank or a bigger holder). At this point a picture of your setup (workpiece in the chuck, tool, toolholder, tailstock support (if you're using it).
You're getting better every time.
GsT