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Seam Placement and Gap

To understand why Z-seams form, we must examine the transient behavior of molten polymer flow inside the nozzle during start and stop phases.

Physics and Mechanics of the Z-Seam

To understand why Z-seams form, we must examine the transient behavior of molten polymer flow inside the nozzle during start and stop phases.

Nozzle Pressure Dynamics

When the extruder is printing a continuous line, the polymer melt inside the nozzle is pressurized to maintain a constant volumetric flow rate ():

Where:

CategoryUltimaker Cura
LibraryCAM library

Engineer, author of The Big Book of 3D Printing and additive manufacturing expert