Yes is senssorless drive.
The physical belt-pulley system in changed through a solenoid valve.
Today I study my problem and I saw that BOB output range is completed form S0 to S200 rpms!!!
I have disconnect everything tried different settings for pulleys form max 2500 to 25000 but the same output.
I have disable the motor X,Y,Z , I have only 10V from VFD to BOB.
Steps are set to 1000 and Velocity to 1500 with a 25000KHz kernel.
I used different Steps and Velocity setting but always full range is from S0 to S200...