Steve,
Kudos to you. Unless you insist on an expert in every hire you get, you will grow no more experts.
Nobody was born as "the best". Everybody was trained by somebody. You are trying to make accomplished operators of them, my hat's off to you.
There is not an employee in any profession that has not made a screw up. If he learns from it and doesn't do it too often, and we all know that when you are cutting metal, sh*t DOES happen, you are going to have a good and happy employee who does take pride in his work.
You get into his sh*t for a little f**kup, you are gonna have a resentful employee. Encourage him to, one, make good parts, and, two, if he's unsure, call his boss and ask for advice. Better than blowing some of that 718 stuff to the recyclers.
Good on you.
Cheers,
George
Been there, done that. First machine I bid on at the Westinghouse, 56" Bullard Cutmaster, no f'ups for a couple months, slow, but good. Put a stack of 12 30 OD, 28 ID, 1/2 thick rings on. Bore, reclamp, turn, 45 degree 1/4 inch chamfer OD. 11 were good, 12th collapsed and ruined the 12th piece, stack came down.
Next day, job assignments came out, I got sh*t work, no time for it (all piece work).
Went to see the guy assigning the work to bitch. He said "Eddie (daylight man) says you screw up all your jobs."
Threw my book on the desk and said you check my book with the jobs I have been assigned, find another that I have screwed up.
He couldn't, I got better paying pieces and made lots of them.
I think, and it has been 30 to 40 years ago, I could count mebbe 6 pieces I screwed up beyond redemption. Fortunately cheap pieces as above. Spider for a rotor could be salvaged with some weld. I did one of them with bad parallels. 500 pounds or so of either cast iron or cast steel. Cast steel, I think. 6 legs at about 150 RPM, flinging chips all across the bay, about 60 foot.
Finally had to get me a welding curtain to trap the chips so people could walk by without getting shot in the ass with elbow macaroni sized chips.
Them DO sting! You can stand at the controls and run the machine, though. They tend to come out at a given angle, not the operator's position.