Double Lines & Ghosting When Vectoring Lines

If you are getting double lines and/or ghosting when vector engraving, its caused by the laser beam reflecting/refracting off of the nozzle opening.

Here is an example of this phenomenon:

Here is what's happening inside the head, showing a properly aligned beam and one with beam verticality issues.

And here is a link to how to correct the beam verticality:

How to correct beam verticality: Step 2 — Verticality Of The Beam