Below is a sample of Z-Stripping
Model on left is with tape model on right is without tape.
2mm Layer Shifting.jpg



Z-Stripping is caused when the Lead-screw warbles as it spins, causing the different layer extrusion to be offset from the previous layer.

You can test simply by raising and lowering the Z-Axis if you can see the lead-screw wobble this will cause Z-Stripping in above image.