Z artefact Any ideas what the origin of the z artefacts in the enclosed picture could be? It appears at 0.1mm layer height and does not correspond to z screw pitch (M8 1.25mm whereas this is about 0.8mm). I am using a self sourced Mendel90 and the print is done with fan on, PLA @200 PID and bed @70 bang bang delta 0.5degree. The model was sliced with slic3r and the preview looks ok. The layers look slightly squashed/over extruded. Possible sources: - Filament inconsistency - Extrusion in different direction - Combination of z wobble - Slicer issue - ? I have produced nicer looking prints at 0.1mm before so it should be possible to fix. [attachment 91692 _20170308_195152.JPG] https://reprap.org/forum/read.php?262,754313,754313#msg-754313 Sat, 18 Jul 2026 13:41:21 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?262,754313,756158#msg-756158 Re: Z artefact https://reprap.org/forum/read.php?262,754313,756158#msg-756158
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hsbontop
Made a three loop cylinder and printed with previous settings (bottom), with hotbed turned off (middle) and with PID (top). Clearly bang bang hotbed creates some artefacts even if the delta is low.
[attachment 91742 _20170309_214253.JPG]
Printed a single wall cube with PID as well, it came out with no artefacts and spot on in width.
[attachment 91743 _20170309_214152.JPG]
I'll have another go at the precious part.
(Reason for not using PID was burned electronics caused by a bad combination of psu and power expander)

I did read "bang bang hotbed" Then I was lost.. Sorry.. (:P)]]> SatorCodex Printing Wed, 15 Mar 2017 19:09:55 -0400 https://reprap.org/forum/read.php?262,754313,755606#msg-755606 Re: Z artefact https://reprap.org/forum/read.php?262,754313,755606#msg-755606
Printed the original part without artefacts. The band at the top is slicer related.
[attachment 91952 IMG_20170313_215939.jpg]]]> hsbontop Printing Mon, 13 Mar 2017 17:11:02 -0400 https://reprap.org/forum/read.php?262,754313,755323#msg-755323 Re: Z artefact https://reprap.org/forum/read.php?262,754313,755323#msg-755323 JamesK Printing Sun, 12 Mar 2017 16:06:05 -0400 https://reprap.org/forum/read.php?262,754313,754624#msg-754624 Re: Z artefact https://reprap.org/forum/read.php?262,754313,754624#msg-754624 [attachment 91742 _20170309_214253.JPG]
Printed a single wall cube with PID as well, it came out with no artefacts and spot on in width.
[attachment 91743 _20170309_214152.JPG]
I'll have another go at the precious part.
(Reason for not using PID was burned electronics caused by a bad combination of psu and power expander)]]> hsbontop Printing Thu, 09 Mar 2017 15:55:48 -0500 https://reprap.org/forum/read.php?262,754313,754313#msg-754313 Z artefact https://reprap.org/forum/read.php?262,754313,754313#msg-754313 Possible sources:
- Filament inconsistency
- Extrusion in different direction
- Combination of z wobble
- Slicer issue
- ?
I have produced nicer looking prints at 0.1mm before so it should be possible to fix.
[attachment 91692 _20170308_195152.JPG]]]> hsbontop Printing Wed, 08 Mar 2017 14:02:45 -0500