How do you guys handle night shift leaving jobs half finished?

The short answer is that documentation requirements vary wildly, but a proper handoff should always detail machine state and pending offsets. In my experience, when shifts are running really tight, the night crew often just 'finish the pass' whatever that means and hope the next guy figures out the tool wear or the exact depth it sat at. It turns into guesswork, which is exactly the problem you’re seeing. If the setup is that complex, like a multi-cycle job where the tool backed off a certain amount, the person running it needs to mark the specific dimensions they left off on the fixture or in the control itself. A simple digital note or even a physical tag attached to the fixture is better than relying on memory. If they weren't sure of the numbers, they should have backed the job into the program as a 'Paused' state rather than just moving the offsets and hoping you could tell by looking at the spindle position. What works in the more proffesional shops is a formal shift transfer log, not just a sticky note. That log needs to show the job number, the line number they reached, the current tool offset, and the exact physical stop point. This moves it from a 'guess what he did' situation to a documented state that you can verify before you start running production. Otherwise, you're just hoping the previous guy was thorough, and that rarely happens, not even in high-end shops. It often comes down to shop culture and how well management trains for handover procedures. If there aren't protocols in place, you'll keep getting caught in that 'reverse engineering' cycle. You're right to spend your time correcting the process, because if you don't enforce that documentation, you're just relying on the good intentions of guys who are running on caffeine and three hours of sleep.

I used to work in a bakery where the night crew was the same way. Nothing written down, you just had to look at what was half-done and figure it out. We fixed it by having them take a photo of the tray table right when they stopped and text it to the group chat. Took five seconds and ended most of the guessing. Maybe something that dumb-simple woud work here too, no official logbook needed. Also can I ask, when people say the work offset got bumped, does that mean he changed where the machine thinks the part is sitting? Trying to picture how that messes up a half-finished piece.

Ran nights for a few years and honestly half the guys weren't being lazy, they just got yanked onto three diferent jobs by 2am and whatever they left behind was whatever they left behind. The 'wasn't sure about the numbers' excuse twice in a row though, that's a pattern, not a coincidence. I'd loop in the shift supervisor before it turns into a third morning. We had a whiteboard bolted right next to the control and the rule was you couldn't clock out till the machine had a note on it. Low tech, but it worked because it was impossible to pretend you didn't see it.

One thing that worked at a place I ran a mill at: nights had to park the machine, not pause it. Tool at machine home, program pointer back at the start of the next op, work offset zeroed if they touched it. Sounds like overkill but it means you can verify everything from cold instead of trusting a spindle that's already sitting somewhere in the middle of the stock. Took about two minutes at end of shift and cut the morning arguments down to almost zero. Also, and this is the pedantic part, if the guy genuinely wasn't sure of the numbers, the right move is to stop before he touches anything, not back the tool off and bump an offset after. Backing off a quarter inch tells you nothing about whether the cut completed.

Quick update - I had a conversation with the shift lead and suggested we require them to park the machine when they finish thier job. The rule is tool goes back to home and offsets get zeroed out. It’s a bit of extra work for them, but it gives me a clean starting point instead of reverse engineering mess.