Lerdge S cooler
thingiverse
I upgraded my Lerdge S board to TMC2208 for significantly better performance and virtually zero noise. The standard cooling system was a small 40x40x10 fan that sat about 25mm from the board, only pointing in the general direction of the extruder stepper driver. I wanted to ensure everything stayed cool and guaranteed all the stepper drivers had airflow. The venting side of the design blows directly over the main processor heat sink, ensuring constant air flow. The noise with two 24v blowers is substantially less than the stock stepper drivers moving the printer around.
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