Cetus dual fan - PWM controlled fan - TINYFAB CPU

thingiverse

Fairly crude but working dual fan setup for the cetus 3d using the TinyFab CPU. Great results from the PWM controlled fan. Previous setup had the fan on all the time. Had to redesign the all the parts attached to the fan element of the hotend. Some soldering required. Use at the owners own risk. To get the PWM to work had to wire straight on to the CPU and run the signal through a logic convertor to get a 5v signal. Therefore 5V source required which I got from a third party Power supply which is being used for the heated bed at 24v. constant ground and 3.3v came from the CPU itself shown in the pics. 08/08/19 - noticed a mistake in the pdf, arrow for pin 16 was pointing to pin 14. Corrected hopefully. 18/03/19 - Final fan mounts and shroud added. The fan shroud can be printed without supports with the wider part on the surface. Fan mount is printed upside down, no supports. Revised fan duct for throat, printed with the right surface on the bed with the two arms straight up - no supports. 21/02/19 - Added a smaller design, files to follow. 21/05/18 - add a pdf instruction doc for the wiring. 25/05/18 - Tied up the fan shroud a bit. Shrunk the top hole to refocus the air towards the tip BTW getting some amazing results courtesy of Cetus, TINYFAB CPU, S3D & part me.