My spindle crashed at 8000 RPM on a Friday afternoon

Running a Haas VF2 at my shop in Boise. Job was a 4140 steel part, needed a deep pocket. Program looked fine. Spindle hit 8000 RPM, then a loud bang. Tool holder snapped, part was wrecked. I shut it down, checked the G-code. Found a Z-depth error, my fault from a bad tool offset. Boss wasn't happy, but we salvaged the material. Anyone else had a crash from a simple offset mistake? How do you double-check yours?

2 comments

2 Comments

ray_king11d ago

Honestly, that sounds like a pretty standard Friday in a shop. At least the material was salvageable, right? Those offset mistakes happen to everyone.

elizabethblack10d ago

Ouch, that's a rough one. I get what @ray_king is saying about it being standard, but a tool holder snapping at 8k is more than a little scare. For offsets, I always physically touch off the tool, then check the number on the screen against my setup sheet before it ever touches the part.