Stepcraft CNC stepper motor knob
thingiverse
Sometimes it is necessary to move the stepper motors manually which is possible if they are disabled. This can be in case of your CNC machine pushed the machine limits and the security function shuts of the controls but also for maintenance reasons. The stepper motors on a Stepcraft CNC have a drive-shaft on both end. The diameter is 5mm and it is long enough to hold the knop. The STL file has 5mm diameter hole but it is necessary to redrill it. Also the hole in the shaft needs a M3 screw thread.
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