A few days ago I have replaced the contactors, this did not solve the problem in the servo however was necesary because of the smoke,
Today I made a temporary cable from the encoder to the SMB. This is a sub-d 15 (encoder) -> IDC (SMB), which currently does not go through the bearing but is going from the outside to the SMB. This did solve the problem.
This week I will replace the connector from the original cable as the above is only temporary. Hopefully this will solve the problem because replacing the complete cable will be dificult.