I really appreciate all the feedback. Thank you.

Grounding looks to be the next step. I haven't had this issue in the past so I figured it was grounded properly all these years, but maybe I need to take a closer look. I see that grounding the frame to the 120v is the proper way. Is there an optimal point on the frame to ground from? Close to the cutter? Motors?

We have reloaded the software and firmware many times, but I will give it another go. Doesn't hurt anything.

Another potential I saw on Shopbot's website is "Check if the excess motor cables are looped up inside the control box.". They aren't but I do have excess motor cable looped under the table. Is this a concern for proper communication?