DO NOT EVER turn off the machine without first asking someone responsible.

The laser power is decreasing.
New recommended settings to compensate is:
20mmHQ: 40% power, 30% Filter, 2000 Defoc
20mm: 80% power, 30% Filter, 2000 Defoc
4mmHQ 40% power, 10% filter, 1700 Defoc
4mmHQ 80% power, 10% filter, 1700 Defoc

Refurbished laser installed 120208, All values calibrated.