Ran a test part 4 times before I realized my tool offset was wrong

I had this job for a bracket that needed a tight .001 tolerance on the bore. I kept cutting and measuring, cutting and measuring, and it was still off by .003 every time. After 45 minutes and 3 scrap parts, my coworker walks over and points out I had the wrong tool in the offset table. What's the longest you've chased a ghost problem like that?

2 comments

2 Comments

barbararamirez8d ago

Nodding along because that moisture thing would drive me absolutely insane.

eva_lewis8d ago

The .003 thing is brutal but at least it was consistent! What really got me was a job where my surface finish looked fine to the naked eye but kept failing profilometer checks. Spent two days adjusting feeds, speeds, coolant - the whole deal. Turns out the shop air was dumping moisture into my coolant line and messing with the lubrication. I literally pulled my hair out over that one. The worst ghost problems are the ones that seem random, not consistent like your offset thing.