I checked the machine over and it is well aligned. The lens however is a write off. Someone has managed to actually melt a divot in the edge of it, and a crack has started propagating from there. The central part is still ok, hence the good cutting, but we can’t use a cracked lens. Zinc Selenide is poisonous so we don’t want the crack to turn into a shatter and have to pick tiny shards of poison out of the machine.
**Until a new lens arrives, the cutter is out of order. **