What is the height clearance of the print heads?

For UJF-3042 / UJF-3042FX

50mm (1.97″) clearance is supported.

For UJF-3042HG

Up to 150mm (5.9”) is supported.
* When printing on a molding object of 100mm or smaller, it is necessary
 to install the accompanying vacuum table and the table spacers.