[Lab] 3-D Printers

[Ken]

I now have access to one, a CubeX Duo.  My success rate so far has been 
pretty low (0 for 4 attempts).  It seems that the glue to hold down the 
part is not holding for very long.
I have been going through the tutorials, but haven't hit on this yet.  
They indicate to do three layers.  The question is are these layers done 
at the same time, give time to cure between, or other...?

Thanks for any advice.

Ken