I'm just starting to learn how to use the skew chisel in spindle turning and after watching one of Alan Lacer's videos I decided to invest in a safety drive center, shown below:
He had his students actually practice dig-ins with the safety centers to see what causes the dig-in and to change future behavior to avoid them. The dig-in with the safety center causes the piece to stop turning (with adjustable "cut-offs"), which is different than what you would see with a spur drive. It seems like a good way to learn.
I do have a question on its use. I know the tension of the pin can be adjusted via the hole on the side of the drive. Do I want any portion of the pin exposed between the cup on the end of the drive and the wood? Or do I always want to tighten the tailstock (which has a live center) such that the cup of the safety center in the headstock presses flush against the end of the wooden piece?
Thanks for comments/direction.