I'm not a Heidenhain expert, but "measuring system" sounds like encoder. So, you might swap the encoder cables if this machine has linear encoders separate from the motor. When you get this alarm, does it still display the position readouts? If so, try moving each axis manually, if one of them shows no change in the coordinates, that is the bad one. If this system is old enough, there may be tiny light BULBS in the encoders, and one may have burned out. If you are good at micro surgery, you probably can get in there and replace with a "grain of wheat" bulb or even try to retrofit with an LED.


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