Cura g-code specifies print height taller than model height

[aviphysics 9]

I have noticed on a cylinder that I was printing that Cura seems to have generated a layer above the print height of the object.

In this case, a 6 mm tall cylinder was generated with OpenScad

 

difference()
{
cylinder(h=6, r=4.2/2, $fs=0.1,$fa=0.1);
cylinder(h=6, r=3/2, $fs=0.1,$fa=0.1);
}

Cura agrees that the model is 6mm tall in the re-sizing dialog.

However, the G-code specifies printing layers at z=6.06 and z=6.12. It seems to me like it should have stopped at z=6. (note: the layer height was specified as 0.06 mm )

Any ideas?

 

[Daid 260]

Which version? I recently found a bug related to this in the initial layer height.

 

[aviphysics 9]

Version 14.01

Initial layer height was 0.3 mm.

 

[Daid 260]

Can you try the 14.02 RC2?

http://software.ultimaker.com/Cura_closed_beta/

I'm not seeing the extra Z offset in there.

 

[aviphysics 9]

Cura 14.02 RC2 appears to go to the correct z height.

 

[gr5 897]

The other workaround is probably to have the initial layer height the same as the other layers.