Lack of accuracy on the Z-axis when the width becomes smaller
Hi,
I'm printing faceplates for electronic device enclosures and I'm noticing a lack of accuracy on the Z-axis, especially when the width on the model becomes smaller. It's hard to explain and to search for the correct term in the forum, I don't know how this artefact is called, sorry if this has already been asked before...
My model has a 1.4mm rim all around in which I insert the side faces of the enclosure (the six faces are printed separately).
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On the printed part this rim tends to become very inaccurate and don't respect a 90° angle the higher it goes on the Z axis, it falls on the sides as you can see on the following image. Sometimes it's really worse than shown on the picture below. That's also a reason why I don't print my enclosure in one block, the corners are bulging if I do and that's very noticeable and unpleasant.
I'm printing on a Prusa Mini + with a Nozzle X and the current filament is ExtrudR NX2 printed at 210-215° at a max speed of 50mm/s.
For what it's worth, I had the same issues with other filaments like Prusa ASA or Formfutura Reform PLA.
Is there a setting I could tweak in Prusa Slicer in order to compensate this accuracy issue on the Z axis ? I already tried to print at lower temp but with this filament the layers don't stick well together if I lower the temp too much.
I'd appreciate any help.
Thanks 😉
RE: Lack of accuracy on the Z-axis when the width becomes smaller
And I forgot to add that the layer height is 0.15
RE: Lack of accuracy on the Z-axis when the width becomes smaller
Hi,
I noticed this (or a similar looking) artefact on outer walls which seems to be caused by a changing infill pattern behind the wall. Is this printed with 100% infill completely? Or has the "front plate" part less then 100%?
RE: Lack of accuracy on the Z-axis when the width becomes smaller
looks like z wobbling / belt loose / belt too tight.
Have You tried reducing the speed in the tune printing screen?
If You are not confident in 3d modeling You could try creating in the slicer 4 cylinders placed at the four corners of the print bed and change the speed at some height (same concept as temp tower). So You can find the speed that works better.
RE: Lack of accuracy on the Z-axis when the width becomes smaller
Hi,
Thank you both for your replies.
I'm printing this model at a maximum speed of 50mm/s and if I remember correctly, the perimeters are set to print at 30mm/s and the small perimeters at 25mm/s. Do you think I should lower it much ? I will also try the test that you're suggesting. And regarding the belt, I remember having a difficulties adjusting the belt once (this + adjusting the skew) but I can try again 🙂 It's hard to know which tension is right...
No, this model is not printed at 100% infill. At first it was set at 30% infill and yesterday I tried at 70% infill and I increased the width of the rim a little bit. I think I had slightly better results with this larger width and perhaps with the higher infill too. I haven't really checked at the infill pattern the Prusa Slicer does for this part but that's an interesting point I should definitely look at. Or perhaps should I modify my model / slicing in order to set the infill at 100% just for the outer parts of the model ? Do you think this would improve the result ? Generally speaking, does a higher infill means better accuracy ? I'm still a newbie with 3d printing...
Thanks again for your help 😉