Box fan knob
thingiverse
Here's the correct setup on your standard box fan's controller. To use it with a high-density printer: First, identify the proper connections for the box fan and high-density printer. Carefully remove any existing hardware or attachments from both units before you start. Now connect the high-density printer to a stable power source. The manufacturer recommends avoiding extreme temperatures and moisture. Plug the other end of the box fan's controller into the corresponding receptacle on the standard setup box fan housing. Be gentle, as damaged components may render your equipment unusable.
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