extrusion - Holes/ missing layers (after retraction) in 3d printed objects - 3D Printing Stack Exchange
Gaps in 3D Prints: How to Fix & Avoid Them | All3DP
7 problems affecting the quality of your 3D prints - Prusa Printers
How can I prevent these missing lines on my number wheels? Only seems to happen above and below the detailed layers. Resolution, print speed, flow rate, and temperature have no effect. :
A visual Ultimaker troubleshooting guide - 3DVerkstan Knowledge Base
3d Prints Missing Layers - 3D Printing / 3D Printers - Talk Manufacturing | Hubs
The Ultimate 3D Print Quality Troubleshooting Guide 2019
Are there missing layers? – X3D
Missing Layers (Creality CR-10) : r/3Dprinting
Prusa Knowledge Base | Clogged nozzle/hotend (MINI/MINI+)
pla - missing small sections of layers after a retraction - 3D Printing Stack Exchange