I found out what happened on my system.
The power cord for left motor came unplugged, and the right motor kept going and jumped a link or so. How the power cord came unplugged is a mystery to me. It would seem a good idea if these had retaining clips.
Anyway I am not sure what I will do, if I will recalibrate or change machines. As I said before I just need the machine to work and I just dont have time to have repair, recalibrate when I am I already am working dark to dark.