I thought I had all my comm issues solved. Been running the machine in the air for 8 hrs a day for a few days. No lost steps, comm errors nothing. I was double checking as I went along also to make sure the machine was still returning to home each time before next file start.
I had the first simple job to cut on it a few minutes ago since new control CPU and at least 24 hrs of air cut time with no issues.
The attached pic show what happened. Had file setup to run 3ips ms 8 js. I went to speed it up via shift> I only went up to 3.5 with shift> then hit spacebar to pause and resume just so it would rework the ramping speeds. As soon as I resumed it started hatching out that part of the "D" It then finished cutting it out and came up short. It also did not cut the first part of the "D" at all. I let file continue, it cut everything else out fine. So I figured I would just restart file and stop it after it cut the missing part. I quickly realized as in the pic of "B" it had lost time in the y axis. Quit the file.
I redid the cut file just to cut the missing part. (And the part the bot forgot was correctly part of the original toolpath.)
The machine never "jumped or grinded" it ran smooth the whole time except for hatching out that portion, losing a piece to cut and moving y in about a -.25"
It seems that -.25" got lost somewhere from the keyboard to the end of the router bit. (in the software)
Over the years I have had the bot freeze before, lose its position. Then had to rezero x,y correctly, restart file where it lost comm. But I dont know how to combat this one.
Of course this was just some paint stencils so no harm done. But had this been a carved sign I just ruined the prepainted, paintmasked sign blank. And I have a big piece of cypress to flat bottom carve monday.
Dave