Hey, everybody. I just remodeled my z-axis on my CoreXY machine making it a lot stiffer. I have been having trouble removing an artifact from all of my prints. First, I got the classic thread pitch banding which aligned perfectly with my 1/4" ACME lead screw. [attachment 87564 Optimized-IMG_20161217_103536.jpg] This shows the thread banding on the left and something I cant' figure out on the right. The same problem exists in both prints. It is some low frequency issue that appears to be lower frequency than any z-axis problem (the dark and light banding suggesting some thinner and thicker layers). I decided to print something witha different amount of filament layed down per layer to see if the frequency changed and it seems that it did. [attachment 87565 Optimized-IMG_20161217_161120.jpg] Could this be an oblong hobbed bolt in my old Gregs extruder? Or maybe some temperature fluctuation? Please help, this is last thing I have to solve before I can achieve near perfect prints (in my eyes ;) ). Thanks https://reprap.org/forum/read.php?262,731458,731458#msg-731458 Tue, 06 Oct 2026 04:48:56 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?262,731458,735408#msg-735408 https://reprap.org/forum/read.php?262,731458,735408#msg-735408 jtoombs Printing Wed, 04 Jan 2017 01:01:55 -0500 https://reprap.org/forum/read.php?262,731458,732501#msg-732501 https://reprap.org/forum/read.php?262,731458,732501#msg-732501 the_digital_dentist Printing Thu, 22 Dec 2016 14:55:21 -0500 https://reprap.org/forum/read.php?262,731458,732493#msg-732493 https://reprap.org/forum/read.php?262,731458,732493#msg-732493 jm44807 Printing Thu, 22 Dec 2016 14:22:27 -0500 https://reprap.org/forum/read.php?262,731458,731872#msg-731872 https://reprap.org/forum/read.php?262,731458,731872#msg-731872
I'm wondering if it is a heat-bed related thermal artifact. Is it possible to try a print with the heat bed off? Or maybe at least drop the temperature half way up the print and see if it impacts the banding as the bed cools.]]> JamesK Printing Tue, 20 Dec 2016 06:42:08 -0500 https://reprap.org/forum/read.php?262,731458,731458#msg-731458 https://reprap.org/forum/read.php?262,731458,731458#msg-731458 [attachment 87564 Optimized-IMG_20161217_103536.jpg]
This shows the thread banding on the left and something I cant' figure out on the right. The same problem exists in both prints. It is some low frequency issue that appears to be lower frequency than any z-axis problem (the dark and light banding suggesting some thinner and thicker layers). I decided to print something witha different amount of filament layed down per layer to see if the frequency changed and it seems that it did.
[attachment 87565 Optimized-IMG_20161217_161120.jpg]
Could this be an oblong hobbed bolt in my old Gregs extruder? Or maybe some temperature fluctuation? Please help, this is last thing I have to solve before I can achieve near perfect prints (in my eyes ;) ). Thanks]]> jtoombs Printing Sun, 18 Dec 2016 11:44:53 -0500