Tom,
The machine sat for a few days and now it is having the issue all of the time.
I will be trying another PC running XP to see if it makes a difference.
I have also looked over my grounds without any findings of a problem. The only task I have left to try on that end is watching a scope while it is all running. However, the error is much delayed now, as much as a minute after powering servos and moving around a bit. It has definitely changed for the severe.
Please test this on your end with the snapamp. It needs to start to working better, because it is too light to work well as an anchor.