![Getting acquainted with my new serger and cannot for my life figure out what this knob above the flywheel does. Anyone have any ideas? : r/sewhelp Getting acquainted with my new serger and cannot for my life figure out what this knob above the flywheel does. Anyone have any ideas? : r/sewhelp](https://preview.redd.it/jutcydzm5l881.jpg?width=640&crop=smart&auto=webp&s=b52f490afe3a6118646296e81a329de6f0706574)
Getting acquainted with my new serger and cannot for my life figure out what this knob above the flywheel does. Anyone have any ideas? : r/sewhelp
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