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Heard a guy at the shop say "I never touch the offset" and it got me thinking
I was grabbing tools near the break room and some old timer was telling a new guy he NEVER touches tool offsets after setup. Just runs it and hopes. That sounded crazy to me because I adjust offsets ALL the time on our Haas mills. Takes maybe 30 seconds to tweak a wear offset and save a part from being scrap. Does anyone else run into parts that need a tiny offset bump halfway through a run or do yall just let it ride?
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margaret_williams54mo ago
The old timer's method sounds like a recipe for scrap to me. Real world tooling just wears down over time, and a quick offset tweak can save a whole batch from being junk. You're right that it only takes a minute to adjust a wear offset on a Haas, so why risk it? Maybe he's running really forgiving materials or roughing ops where a few thou doesn't matter. Do you bump your offsets mid-run based on a gage reading or just when you see issues?
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finley7294mo ago
Measurements all the way, every time. If I'm holding a tight tolerance, like +/- .0005 on a bore, I'm checking every third part with a mic and bumping the offset as soon as I see it creeping. Had a job last month where the insert was wearing predictably, so I just dialed in a .0002 adjustment every 10 parts before it even drifted enough to see problems. Saved me from scrapping a whole batch when the finish pass got fuzzy near the end. But I get the old timer's logic if it's just roughing aluminum or something where a .003 swing doesn't matter. Do you do that predictive tweak thing too, or are you more of a reactive adjuster?
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anna_ross193mo ago
Yeah, I've done that predictive thing on a long run of steel flanges and it kept me from chasing the tolerance all day.
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