![]() The top one is 50%, middle is 100% (roughly 50mm/s print speed) and the bottom one is 150%.Īny ideas on what might be causing this? It seems like there is some sort of time-dependent layer thickness or flow rate variation in my system. Attached below is a photo of the same print run three times back-to-back. However, while doing these tests, I discovered that the banding was not related to filament consumption rate, but it was correlated with layer time - objects & regions with faster layer times showed less horizontal banding.įinally, where things stand now, and a picture: If I run the exact same test print gcode file, but use DWC to change the speed factor from 50% to 100% to 150%, I get drastically different amounts of horizontal banding in the print - where, somewhat unexpectedly - the faster prints exhibit far less banding. I checked every possible source for filament thickness variation or filament friction, as well as all of the electrical settings around my extruder and hotend, but was, again, unable to see a direct influence on the horizontal banding. Then, my thinking went to extrusion variation. ![]() This indicated to me that it was not likely tied to the Z stage mechanism but something else in the system that was linked either to filament consumption or a time-dependent factor. If you have a 6mm belt based printer or the orientation of the teeth on your belts. When I was printing large (in XY) test objects, I had intense, high frequency (in Z) banding, and small (in XY) test objects, I had moderate, low frequency (in Z) banding. Notice how on the front heavy (Aero and Hemera) faces the screws are. However, after reviewing every known mechanical and electrical aspect of the bed, I wasn't able to show any meaningful impact to the banding - and, critically, I discovered when doing test printing that the banding got better/worse as the size of the test print changed smaller/larger. My immediate thought with horizontal banding is Z stage imperfections, especially since this is a very large, very heavy (150lbs?) bed. I'm having some pretty severe horizontal banding, and I've run out of ideas on how to resolve it.įirst, some context: Hardware is a Duet 3 on a roughly 1m cube belt-driven CoreXY layout printer, with AC heated bed, E3D Hemera + Volcano hotend running direct drive. I need some help with the finishing calibration of a large-format 3D printer build I've been working on. Long time happy Duet3D user, first time poster here.
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