Umikot 15 Needles

To print it you may need to rotate the model 180 degrees on the Y Axis.

included with the STL is a pic with the needle length, the length is referring to the length that is coming out of the bottom of the tool after inserted.

I suggest making a small kink in the needle head to make it grip the hole better.

otherwise use the original instructions on how to print, assemble and configure.

I also suggest to use it as followed:
1. Insert tool into the portafilter

2. give it 10 fast spins

3. with the tool inside the portafilter give the portafilter a light tap to settle the grounds 

4. give another 10 slow spins

5. with the tool inside the portafilter give the portafilter a light tap to settle the grounds 

6. take out the tool slowly (try not to disturb the grounds)

7. with the tool outside the portafilter tap (vertically) the portafilter on the tamping station twice

8. level it with a shallow leveler before tamping.

Compared to the original design I added 5 more needles and changed the Needle length a bit to make the WDT a bit better and more uniform.