Checking an expensive part on the CMM. I made a quick program because it was urgent. "Proved" out the program for moves and such. Ran the same part multiple times. CMM reports a large deviation on a critical diameter along a taper and everyone was scratching their heads trying to figure out what went wrong. Management almost conceded to scrap that part. I was asked to re run it again just to make sure and I find a point out of place on my cone construction. It just took 1 apple to run the bunch. Point was accidently taken in a tiny grease hole and I didn't foresee. I used paste and pattern and didn't think twice about it. I re-ran the part and the diameter is nominal, $40k part passed. I'm a genius and an idiot.
The only bad mistakes are the ones where you don't learn from and, unfortunately, the bigger the mistake the more you learn.
Case in point (not related to inspection), I sell and change race tires for motorcycles on the side. My first weekend doing it I was changing a tire and the bead of the tire got caught on the valve stem. I thought the tire was just being difficult so I just forced it around (didn't see that it was caught on the stem)... snapping the valve stem so I (my company) had to pay for a new valve stem for the customer. I learned exactly where the valve stem needs to be on the machine before I start changing the tire and I make sure every wheel goes on the machine with the valve stem in the same location so it does not happen again. It was a mistake that cost us some money and I had to swallow my pride and tell the customer that I screwed up. Bet your a$$ that won't happen to me ever again because I take the extra few seconds every time to make sure it is located properly. It was a mistake but I learned what to do so it will never happen to me again.
The only bad mistakes are the ones where you don't learn from and, unfortunately, the bigger the mistake the more you learn.
Case in point (not related to inspection), I sell and change race tires for motorcycles on the side. My first weekend doing it I was changing a tire and the bead of the tire got caught on the valve stem. I thought the tire was just being difficult so I just forced it around (didn't see that it was caught on the stem)... snapping the valve stem so I (my company) had to pay for a new valve stem for the customer. I learned exactly where the valve stem needs to be on the machine before I start changing the tire and I make sure every wheel goes on the machine with the valve stem in the same location so it does not happen again. It was a mistake that cost us some money and I had to swallow my pride and tell the customer that I screwed up. Bet your a$$ that won't happen to me ever again because I take the extra few seconds every time to make sure it is located properly. It was a mistake but I learned what to do so it will never happen to me again.
