Z banding but only on X axis?

[slybunda]

What does it mean if im seeing some inconsistent Z banding but only on the X axis and none on the Y axis? if bands are on X axis does that mean its an issue with the bed movement on the Y axis? could it be belt related?


pics:

[CrazyIvan]

Dunno!

[slybunda]

i checked my box of earlier prints and looks like iv always had this issue. the first filament roll i used was a matt dark blue and inspecting very closely i can see its happening on it as well. i guess i can notice it more now since im using light colour silk filament which makes it stand out more.

does this happen to anyone else with the tina2 if you check real close to the printed part?

[CrazyIvan]

I think you might be right, I'll have to have a look. It's never been a particular concern for me, my parts are for function, with appearance further down the list of priorities.

Just to check: the surface showing the defect in your photos – that's what you would see flat on looking into the build chamber? Would I be correct in thinking it gets worse the higher up it is?

If so, it strikes me this may be an inherent problem with the build plate moving to provide the Y dimension, and therefore shaking the workpiece in Y. That could mean the next layer is misregistered (in Y) which would show up on an XZ surface.

[slybunda]

iv marked with the pencil at the bottom of the print in one of the photos the side that you can see when you directly look into the build chamber. i believe thats the X axis side since its made using left to right movement of the head. Thats the side with the visible banding on it.
I have a feeling this may be caused by the bed movement. im gonna check to see if anything is slack since if the bed doesnt get into 100% correct position the lines created will be slightly off.

This shows up on my light coloured silk filament due to how the light reflects from it. Very hard to see on the matt dark blue filament and even on matt white filament.

will inspect the belt on the bed and see how it is, its not so bad as in it ruins the print, iv seen some pics of very bad Z banding, what iv got i can live with considering the price of the printer (£100).

[CrazyIvan]

iv marked with the pencil at the bottom of the print in one of the photos the side that you can see when you directly look into the build chamber. i believe thats the X axis side since its made using left to right movement of the head.

Yep. So the positional error is in Y.

I have a feeling this may be caused by the bed movement. im gonna check to see if anything is slack since if the bed doesnt get into 100% correct position the lines created will be slightly off.

...will inspect the belt on the bed and see how it is, its not so bad as in it ruins the print, iv seen some pics of very bad Z banding, what iv got i can live with considering the price of the printer (£100).

Indeed.

I think moving the bed to provide either X or Y motion is called "bed-slinger" in 3D slang, and I think I'll be looking for either a static bed or only motion in Z for my next printer (Z just moves a tiny amount, and only between layers not within a layer). My reasoning is that this will avoid shaking the workpiece so that tall thin prints won't go wobbly.