OBSIDIAN GF+PA6
Obsidian-GF Glass Fiber Reinforced PA6 filament was formulated to offer rich colorful options in an engineering-grade material for your Markforged printer. Obsidian-GF is a lower-cost drop-in Markforged Onyx Alternative suitable for all Markforged printers. We developed this material after extensive analysis and testing
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Well, it works
I really hope the intended humor of the title isn't lost.
I've been using this filament for a functional prototype for a few years and have had the usual hurdles to deal with, but properly handled and printed this stuff rocks.
There is some shrinkage that is noticeable in parts printed to a tight tolerance. Without having exact measurements, I'd estimate about 0.5% off a Qidi xmax 3 at 275c nozzle, 90 bed and 60 chamber. DO NOT READ THIS AS GOSPEL FROM ONE ESTIMATION.
I've had great success with this as a functional part that's survived significant vibration and shock