laser spatter on focal lens

[dugganeer]

we have been having an issue with laser spatter on our focal lens as well as filling our nozzles . just wondering if anybody had the same issue or could help me figure out what is causing it.

 

[tstc]

from which material(s)?

 

[dugganeer]

I went and looked at the alarms form when this had started and this is what I came up with.
F00017 inverter trouble. this is also on the mits lvplusII . any help would be highly appreciated .