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Can we talk about how one loose toolholder bolt ate 3 hours of my Monday?
Monday morning I was running 500 aluminum brackets on the VF-2 and every part started coming out about 0.004 in off, so I checked the program, the offsets, the fixture, all of it. Pulled the spindle cover off around 10am and found one bolt on the toolholder clamp backed out maybe a quarter turn, which made the tool pull just enough to walk the cut. Tightened it, re-indicated, and the next part was dead on, but I had already scrapped 14 pieces and two hours of that was just me staring at a screen that was fine. If you run a machine older than a few hundred hours, check those bolts on your next setup, the torque spec is in the manual and it takes 30 seconds. What's the dumbest 10 second check that has cost you a whole shift?
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charlesanderson11d ago
A quarter turn. On one bolt. That is wild to me. The fact that a tiny bit of movement makes a tool walk 0.004 and ruins the cut is what gets me, because you would never guess it looking at the machine. You did everything right by the sound of it, checking program and offsets first, and the whole time it was a bolt you could have checked with one hand in half a minute. Fourteen scrapped parts plus two hours of staring at a screen that was fine is the part that hurts the most. I'm going to go check every clamp bolt on my mill tomorrow before the first run.
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