V4 500 Hybrid second Y resonance peak?
Any ideas what could be causing this second peak on my Y graph? Is it likely toolhead vibrations since it's around 100Hz?
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For me, with a toolhead 1.0 on a V-Core 3.1 (so kinda similar to yours), I didn't have the Toolhead properly tightened across all of its bolts (specifically the countersunk ones that went through the plate to the printed parts), and my belts were a little loose.