If really the machine stop every 10 seconds, you have a problem with LUBE seriousle, by lack of maintenance in according with the schedule of instructions manual.This produce ENOUGH friction between deck vs deck belt, shut down the electronic system for protection. Proceed.
2) The deck belt can be worn, by lack of LUBE
3) You must check the drive belt motor
4) Test the rollers bearing by lack of LUBE
5) Test the motor input voltage, the main motor can be needed repair, bearing faulty, winding burn.
6) Main motor board test the output for input to the main motor.
7) You can adjust the speed sensor, clean, and tight the connector wires very well, see the diagram attached.
finally after you did every test, RUN the software calibration. sincerely. God bless you