We are having a trouble with the CO2 Y laser where every time when we request an angle to the rotation stage, it trips the laser for unknown reason. According to the MEDM screen, "RTD/IR SENS. ALARM" turns in red when we request an angle to the rotation stage. We needed to hit the gate button at the floor in order to untrip the laser. If we do not change the rotation stage angle, the laser seems to stay on,
We need help from experts.
Fixed.
It was loosely connected D-sub calbes. I went to the floor and was going to inspect the controller box as suggested by Alastair. However, it turned out that tightening up all the D-sub cables on the front panel of the controller box apparently fixed the problem. I did not even try to reproduce the issue.