Swivel Runout sensor
thingiverse
Swivel runout sensor uses stock ender 3 limit switch and 2 F693zz bearings. On Rear mount use a 3mm heat insert and leave it protrude just a small amount to allow bearing clearance. https://youtu.be/EwnoCHCPZhU?si=xvy0naw4mH5taA6c
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