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Why is everyone so scared of running a program from the middle?
I was at a trade meet in Cleveland last month and heard a guy tell a new operator, 'Never, ever start from a block in the middle, you'll crash it for sure.' That's just fear talking. I've been doing it for years on our Haas VF2 when we need to re-run a section after a tool change or a probe check. You just need to know your offsets, your work zero, and where the spindle actually is. I saved a whole batch of 4140 parts last week by picking up at N1450 after a bad insert, not by wasting an hour resetting the whole job. It's a skill, not a sin. What specific steps do you guys take to make a mid-program start safe on your machines?
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reesemoore1mo ago
That Haas in Cleveland probably needed a better operator.
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danielr941mo agoMost Upvoted
Was that the one where the guy kept blaming the coolant for his own bad offsets? Classic case of the machine outliving the operator's skill.
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grantschmidt1mo ago
Yeah, that Cleveland story got mixed up. It was actually a Cincinnati machine, not a Haas. The real problem was the shop never updated the control software, so it kept throwing random errors. A good operator could only do so much when the machine itself was giving bad info. They finally brought in a tech who flashed the firmware and it ran fine. Sometimes the gear is just broken in a way no amount of skill can fix.
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