HI everyone! I'm brand new to the site and almost just as new to machining. Not too long ago (April 2011) I was promoted to running a CNC Boring Mill at my work. My previous position was in maintenance. As you could imagine I was super excited. I received roughly 6 weeks of training and then was sent out on my own. I was doing really well and in my first review i was told I was going to be promoted again to the biggest boring mill in the shop (mainly due to the lack of operators we have on second shift and the work that goes on that particular machine makes the shop considerable amounts of money. So having it sit all night doesn't do anyone any good). Again, I was extremely excited. Excited for many reasons, from the type of work the machine gets, to having a more advanced control, down to the fact that there are windows next to the machine. Well recently I have been making mistakes. Too many mistakes in my eyes. Today marks two in a row. Non-conformance's. And really bothers me. I take my time, double/triple check my math, double/triple check my programs, test run the cycles, scribe lines, stay off the part for a dry run and STILL I manage to make mistakes. I know that there is a learning curve but my confidence has really dropped. Basically, I'm wondering from an experienced point-of-view, is this something to be expected? Is there anything I can or should do differently? Or maybe even to know that there will be light at the end of the tunnel. Just like anyone else (hopefully) I take pride in my work and what I do. I literally get sick to my stomach and try as hard as I can not to take it home with me but I'd be lying if I said it hasn't kept me up at night. If anyone has words of wisdom and are willing to share them with very green apprentice it would be greatly appreciated.