Ultimaker Printhead

Ultimaker printhead with top-mounted fan.

I was inspired by Coyote69's lightweight printhead. I used that design for a few days until it warped during a long print. I tried several iterations and this one seems to work well. I've been using it for several weeks now. The weight reduction between the stock Ultimaker parts and the printed parts and fasteners is about 20 grams - so it's not great, but is a reasonable reduction. Most of the weight reduction is due to short screws instead of the long thumbscrews.

The top-mounted fan is not intended to cool the nozzle (active cooling), but to replace the side-mounted fan.

To keep the heat from distorting the printed parts, I tried to move those parts away from the hot bits and changed the how the loads are distributed around the clamped nozzle.

I am still trying to improve airflow around the nozzle with various air duct designs. Since the airflow goes around the heater block, I strongly recommend adding some insulating mater