2.9.2 Odd multi-material support layering
I have a part I'm printing in one material (PETg) and using a second material as my support (PLA) on my XL. I have it set to only print the interface layers in the PLA material to save time. While the interface is printing correctly, the layers of support alternate between the base material and the support material, as seen in the slicer photos. From the documentation, only the area of interface (3 layers directly adjacent to the print) should be in the support material - not interspersed as alternate layers - resulting in the "candy cane" printing shown in the images. Since the two materials are incompatible, the interface has a high likelihood of poor bonding, especially on small areas like the organic support trees. (Note: trying other support geometries results in the same candy-cane layering) Is this bug and, if not, what is the setting to prevent the alternating layers at the top?
I know that a workaround would be switching the Support Material/raft/skirt extruder to PLA, but that's not acceptable as it defeats the purpose of having the feature and substantially increases printing time.
(sorry for all the in-line images; I don't see a way to attach multiple files.)
Blow up of top of model where supports are required, showing the "candy cane" alternating lines of print vs support material
Once the interface starts (right side of image), the supports behind the print area in alternating layers - this one is red (PETg), and the next one prints with white (PLA)
These are my settings for supports
These are my settings for multi-material (which I'm just now noticing are cut off, but the support material is set to 0 to match the print and to "2" which is the PLA head.
Best Answer by BaconFase:
I know that a workaround would be switching the Support Material/raft/skirt extruder to PLA, but that's not acceptable as it defeats the purpose of having the feature and substantially increases printing time.
If you want the supports to be PETG except the interface of PLA, then just change that parameter to PETG not auto/PLA.
Zero means slicer auto chooses off of whatever logic so you get the candy cane. If you want it to be just PETG(4) then just make it PETG(4) instead of auto(0) nor PLA(2). Simple
RE: 2.9.2 Odd multi-material support layering
I know that a workaround would be switching the Support Material/raft/skirt extruder to PLA, but that's not acceptable as it defeats the purpose of having the feature and substantially increases printing time.
If you want the supports to be PETG except the interface of PLA, then just change that parameter to PETG not auto/PLA.
Zero means slicer auto chooses off of whatever logic so you get the candy cane. If you want it to be just PETG(4) then just make it PETG(4) instead of auto(0) nor PLA(2). Simple
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RE: 2.9.2 Odd multi-material support layering
You may want to also save your project as a 3mf file to upload here (same drag and drop as you use for images). Note, however, that you will need to zip the 3mf file first and upload the zip file because this forum silently removes 3mf files. (Long standing problem that the mods are tired of, but no one is able to fix on the back-end.)
See my (limited) designs on:
Printables - https://www.printables.com/@Sembazuru
Thingiverse - https://www.thingiverse.com/Sembazuru/designs
RE: 2.9.2 Odd multi-material support layering
I know that a workaround would be switching the Support Material/raft/skirt extruder to PLA, but that's not acceptable as it defeats the purpose of having the feature and substantially increases printing time.
If you want the supports to be PETG except the interface of PLA, then just change that parameter to PETG not auto/PLA.
Zero means slicer auto chooses off of whatever logic so you get the candy cane. If you want it to be just PETG(4) then just make it PETG(4) instead of auto(0) nor PLA(2). Simple
Ah - I figured it had to be something simple I was missing. I thought I'd tried that option, but clearly I didn't. Thank you!!