Z wobble/banding

Vertex 3D Printer Vertex - Issues while printing
1

Hi all

Having now used up all my Velleman Black PLA on various projects I decided to test out the white instead. And what a difference!!!

The black PLA was very brittle and layers were very clear. With the white PLA I get extremely nice inter-layer bonding and practically no visible layers.

However, with no visible layers I have noticed another issue: Z-wobble (or banding as it it also sometimes called). A very clear banding of around 1.2-1.3 mm cycle in the Z-axis (I will post an image later). Due to the similarities with the Z-axis rods’ pitch, I assume this is due to a very small misalignment in the threaded Z-axis rod and the Z-axis stepper (?), but I have difficulties trying to figure out how to correct it.

Any ideas?

2

Z-wobble and banding are 2 different phenomenon. Z-wobble is caused by a cycloidal movement of a slightly bended screw and banding by a bad step/mm in the firmware settings (layers are alternatively thinner and thicker in all direction, not in one direction as in Z-wobble.

Check if the leadscrew is not to much pulled in the flex coupler. If it’s touching the motor axis then the coupler can’t fulfill its role of flexible part.

3

Thank you raby. I will give that a try tonight… :slight_smile:

4

Z-banding. See my post
viewtopic.php?f=58&t=13051&p=59203#p59203
My Z-stripes gone away complete with this simple fix.