Seems machine randomly loses its coordinates

Ran the machine for about three hours tonight, lead 1515. Did all the rough pass job everything went fine, on the finish job it got about 20 lines from the end and drove the bit down through the piece and I don’t know why. it was headed in the right X axis direction, but the bit dove down about 2 inches, like it, lost its Z orientation. It looked good in fusion when I ran the simulation. Look good in the open builds software when I ran the simulation. still ruined about three hours worth of work. Any ideas?

 

Screws good, accelerations stock. I’ll check the wiring in the morning.

I will say this, The move before, on the lead out, it stopped and hovered in place for a second before it made the move that killed my piece. don’t know if that’s indicative of anything or not.

 

I have the X4 box, I wasn’t aware you could pull logs from it. i’m leaning towards EMI, or possibly some sort of power fluctuation. we had storms rolled in while I was running that job.
Going to run that job again on the same piece, I can’t mess it up I’ll see what happens.

 

Duhhh.
Thanks Pete.
Headed to shop now. I'll keep you posted.

 

Thanks for the help
I ran the job again on the piece I ruined. It ran fine.
I’m thinking I had a power flicker mid job.
I reckon I need to watch the radar before I fire up the machine.

also running black box X4 on a queenant prov2. Using heavy gauge extrusion reinforced with half-inch 6061 by 3 inch reinforcement plates, on the x and y. Then the whole machine is attached to a welded square tube table top.

very stiff, negligible flex,+\-.0003”

are there any limitations on the black box I need to be aware of as far as increasing acceleration and feed. I’ve increased both slightly running with a 2.2 KW spindle. I’ve had very good results at 80 to 100 inches per minute so far, depending on the material.

appreciate it Pete.