I have a Heidenhain TNC 407 in a 3 Axis milling machine and after I Cleaned one of the glass scale measuring device I lost the reference point, not sure if it is because of that, maybe cleaning the glass scale was just one of my problems, perhaps the problem is in the encoder. So when I start up the machine I cant get the machine to run all reference points. It doesn´t find reference point for the Y-Axis. Is anyone familiar with this problem?