3.8.6 Spindle turns off and loses communication solved. After troubleshooting with Nate from SB tech support (Thanks Nate!) we found the problem. When the spindle freezes and turns off look at the line this happened in the SB software. There will be three J3 commands in a row and it crashes in the middle J3 command. Go to Part File Edit, open the part file and hit Ctrl-f. Enter J3 in Find Text and enter M3 in Replace With and click Replace All and save. Now the file runs with no problems, it does take longer to run but at least it completes. I hope this fix helps until the problem is addressed in the software.

Paul