Espresso aerator with a pretty magnetic base!

Hardware needed:

9 Acupuncture needles: i used 40mm long needles, with a 1.5mmx30mm long shank (total needle length of 70mm)

2 magnets: 6mm x 3mm round Neodymium Magnets

Counterweights: I used 5 pcs of 1 Nok coins glued in, but anything metal or other high mass object that fits in a 21 x 3,6mm hole would fit. (washers are a great low cost item you probably have at hand).

How to print and assemble:

1. The "Needle holder" is printed wit hthe 9 needle holes towards the build plate, this print needs to be stopped before printing Z = 49,40mm (BEFORE layer 247 if printing 0.2mm layer height), slip in the magnet (I would advise to use a small dab of superglue for the magnet to stay in place).
   
2. The “Magnetic base” is printed on the back. I would advise to use 4 or more perimeters on this print. 0.2mm layer height.
   
   
3. After printing both parts place a magnet on top of the needle holder (this way we can mark polarity, see picture), mark the face of the magnet NOT attracted to the Needle holder with a permanent marker or pen. Now you can dab abit of you'r favorite glue (superglue is great for this) inside the magnet hole for the Magnetic base and stick the magnet in the hole with the unmarked side pointing out.
   
   
   
   
4. The needles are a friction fit in the holder, use a set of needle nose pliers to insert them so you dont prick yourself with the needles!
5. Add your counterweights to the bottom (washers, coins etc..)
   
6. Go make some delicious coffee!
   
   
   

Print Settings:

• 0.2mm layer height or lower.
• 4 or more perimeters for the base (for rigidity), the holder isnt critical.

I reccommend you to print this in a matte color ( I used fiberlogy matte black PLA)

This design is NOT for commercial use! AKA dont print and sell!