I have printed 4 columns for my MKII printer I am currently building, I have noticed slight defects on each one in nearly an identical pattern, it looks like a mechanical jump except it goes away the further up the print it goes, it's printed @ .2mm layer with a .35mm nozzle, sliced with slic3r in repetier host and run from a SD card, in black ABS, it cannot be defects in the material as the patterns are so similar. Can anyone give me steer, the only thing I can think of is the code causing it? I have attached some shots, one is my printer. https://reprap.org/forum/read.php?262,361860,361860#msg-361860 Sat, 08 Aug 2026 19:03:21 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?262,361860,362264#msg-362264 https://reprap.org/forum/read.php?262,361860,362264#msg-362264 Paul4865 Printing Thu, 29 May 2014 16:10:59 -0400 https://reprap.org/forum/read.php?262,361860,362262#msg-362262 https://reprap.org/forum/read.php?262,361860,362262#msg-362262 Paul4865 Printing Thu, 29 May 2014 16:09:11 -0400 https://reprap.org/forum/read.php?262,361860,362186#msg-362186 https://reprap.org/forum/read.php?262,361860,362186#msg-362186
Time to get a clue...

Hope my experience helps you... enjoy Happy Printing !:)-D

<sub>Shawn
__________________________________________________________________________________________________________________

25+ Years Experience as a Manufacturing Engineer and New Product Developer
Three Years Experience... Printing 6-8 hours a day, 5 days a week, complex and close tolerance functional engineering prototypes.
Printing PLA @0.1mm Layer Height with +- 0.05mm tolerance for all dimensional shapes (except slightly undersized hole I.D.s).
No printing of... toys, trinkets, low quality prints, or other useless printed objects.</sub>]]> ShawnT98027 Printing Thu, 29 May 2014 13:10:28 -0400 https://reprap.org/forum/read.php?262,361860,362088#msg-362088 https://reprap.org/forum/read.php?262,361860,362088#msg-362088 I'm going on a whim here, you're using Slic3r. If you are, then I'll tell you from personal Slic3r exclusivity that it will make odd, though repeatable, travels outside the model and back into the model, even if each layer is a single area. I don't understand it, it's simply what it does, even when I have "don't cross perimeters" checked. If you don't have it checked, do so, and see if that helps.]]> MrDoctorDIV Printing Thu, 29 May 2014 08:43:56 -0400 https://reprap.org/forum/read.php?262,361860,362068#msg-362068 https://reprap.org/forum/read.php?262,361860,362068#msg-362068 konwiddak Printing Thu, 29 May 2014 08:01:34 -0400 https://reprap.org/forum/read.php?262,361860,361860#msg-361860 https://reprap.org/forum/read.php?262,361860,361860#msg-361860 Can anyone give me steer, the only thing I can think of is the code causing it?
I have attached some shots, one is my printer.]]> Paul4865 Printing Wed, 28 May 2014 17:42:44 -0400