[Machine is printing in the air]

I have had this issue too but normal the nozzle jams and the print keeps going or the print comes off the glass.

[Lifting off the print bed !!! Help please.]

I am new to 3D printing. I have having issues with print lifting off the print bed. Anyone had this issue and found the reason? I have the UM2 and I am using the Elmer's purple glue on the glass plate for adhesion. I am printing with PLA.

[Meshmixer - Thickness Threshold]

What should these all be set to for the UM2?

[Newbee = Print quality not as expeted]

I am new to 3D printing. I have the UM2. Printing with PLA. I tried a few basic prints and these are the kind of quality I am getting. I am not sure what might be wrong or need to be  adjusted. I use the automatic method to clean the nozzle before every print and use the purple glue on the glass print plate.  I am using Cura software and printing on the high level.

[Cutting up 3D images to smaller parts?]

I am very new to this 3D printing and software. I have a 3D object that is too large to print and I need to cut it down to smaller parts. I have Autodesk123D and the Cura software but I can't figure out how to cut the image down to smaller sections that will fit. Can anyone help?