Why nobody talks about how tool offsets can wreck your whole shift

I was running a Haas VF-2 last Tuesday in Somerville and my first part of the day came out 0.015 oversize. Turns out the night guy had bumped the Z offset and never said anything. Do you retram everything when you show up or just trust the last operator's numbers?

3 comments

3 Comments

umathompson8d ago

Buddy of mine over in Framingham came in one morning last winter and their night guy had "fixed" a weird toolpath by just flipping the wear offset negative on all 12 stations - they scrapped an entire skid of aerospace brackets before 9am. @maryt62 is right though, a quick check against a known block beats trusting whoever ran it last.

max4157d ago

Twelve stations? Thats not even trying to fix a problem thats just throwing a grenade at it and hoping for the best. I once walked into a shift change where the guy before me had "fixed" a backlash issue by dialing in 40 thou of wear comp and called it a day. Took me three hours of pulling hair out before I realized he had just been measuring his indicator wrong.

maryt628d ago

Last week in Jersey I came in to a crash that snapped my end mill because the night guy zeroed off the wrong edge finder radius. I check my offsets every morning against a known 1-2-3 block before I load the first part. It takes maybe 90 seconds and saves me scrapping a whole run of hubs.