Quote Originally Posted by Jonathan View Post
I've been resisting the temptation to buy one of these for a while:

http://www.ebay.co.uk/itm/1000W-ZVS-...4AAOSwcu5URhOk

Perhaps I should stop resisting....
I gather that you've used the annealing method yourself - how did you heat the ballscrew, and do you think that there was any distortion? Was it machined out if so? I now have a lathe with a big enough spindle clearance for ballscrew machining, and trying to make sense out of the various sources of "advice" available via Google...