Mailing to service 1 Hello, The customer ..... has a problem with their machine’s brake system. They said that “Sometimes, after we stopped the measuring, while machine speed is slowing down, there is a noise from the brake unit.” When I went to service to the customer, I tried the machine with seven different fan types. I could not see any problem with the brake. There is enough space between the disc and brake lining (please check the Brake.jpg) But there were some brake lining dust on the motor fan cover (please check the Dust.jpg) And there wasn’t any noise, vibration or bad sound! But today they called me again. They said me that, “Saturday we made more than 10 different type fans and there was noise with all rotors. Today we are working with same type fans but there isn't any problem!” Could you please share your advice about that issue, did you have this problem ever? Best Regards,