Heat Sink for a NEMA 17 Stepper Motor, used on most desktop 3D printers and in many other applications.
TCPoly's composite FDM filament allows for printing heat sinks and other electronics cooling devices. Using this device, we saw a 25% reduction in temperature increase on our Lulzbot TAZ 5's steppers.
Thermal tape is required to attach the heat sink onto the the face(s) of the motor.
Link to purchase TCPoly Thermally Conductive Filament
This print has been designed for use with a 1mm nozzle. Be sure to print upright, with the back face of the heatsink aligned with the X-Z plane. The printer should make one pass up, and one pass down for each fin (see the image below). We used a 0.64mm layer height, but you can go smaller.
Check out our TCPoly Filament Printing Guide Here
Use thermal tape to attach the heat sink to your motor
Optimized for a 1mm nozzle
By using 2mm fins and a 1mm nozzle, we have optimized for heat transfer and print speed
Red arrows indicate toolpath optimized for heat transfer, 1mm nozzle
The plot demonstrates the impact of thermal conductivity on the cooling power of a heat sink under a natural convection cooling regime. With identical geometry, a TCPoly 3D printed plastic heat sink (6 W/m-K) can perform within 5°C of an Aluminum heat sink, despite significantly lower thermal conductivity. This is because heat removal under natural convection is often limited by convection as opposed to conduction.