I have my crumb tray out and my item measured 1.8 with my Digital calipers
Did unknown material and input speed focus and lpi and Manual focus of 1.8
When I send it to glowforge it comes back with the measuring error and will not engrave
Welcome to the forum.
You cannot enter the height as 1.8". The Glowforge focus range is 0.001 - .5". Simply allow auto focus and use the set focus tool to align your artwork.
I am happy to help! You can print on objects up to 2" thick by removing the crumb tray. However, your Glowforge canβt focus too far down, so you may need to put something laser-compatible underneath your material to lift it up. Raise it until the top surface of your material is between 1.5" and 2" (50 mm) high, measured from the metal plate on the bottom.