customizable spool holder spindle
thingiverse
Change the length to fit the spool holder. This is a 24mm OD spindle. The design keeps the spool centered on the spindle using the spool's center of gravity. I had one machine that kept jerking the spindle just enough to make it slide off the edge (mainly when I wasn't paying attention to the spool putting it on or walking by). This design keeps it centered even if you put the spool on the holder when you are on autopilot.
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