Tije used his lathe to carve a ripple in the bottom of the tamper that he made for his La Pavoni and for him, this solved the issue of grinds climbing up against the basket wall during his "nutating' and tamping.
Below is a little video, also showcasing the new ROK grinder that he uses and some modifications. He added a little collar to the bottom of the grinder to help prevent grinds flying around with static electricity. This addition may help a little but a droplet of water appears more effective. He also made a seat for the La Pavoni naked portafilter with a magnet in the bottom which then auto-centers to rest exactly below the axis of the burrs.
Since I got the latest LONDINIUM button tamper which has a tapered form, I rarely use the original straight sided button tamper so I asked Tije to carve ripples in that bottom as well. On my system this does not seem to make a big difference but I do like the feel of it and also the looks of the puck.
Original tamper, now rippled on the left, the new tapered LONDINIUM tamper on the right
Tamping
Rippled puck
After extraction: impression of the shower screen and faint traces of the 'ripples'
Delicious cup: all the work was well invested! At the end of the previous blog about the pressostat and PID working together , I mentioned that I would like to clean up the xmas tree of wires and have as few cables and probes as possible to visually disturb the classic design of the La Pavoni. Getting rid of the probe that was fastened with copper tape to the top of the brew group was a priority. I wanted to hide a new probe in the cooling fin as close as possible to the brew group. This morning I asked Tije if he could do that. He would need to drill a straight hole of 3mm diameter in the 4mm inner ring of the cooling fin that sits as a tight clamp around the brew group. Always the optimist, Tije set to work: First, Tije made a piece of aluminum to fit the inside of the ring. Drilling a thin hole straight through the curved aluminum, if possible tangentially going through the inside of the ring to touch the brew head directly, you need the support of the temporary insid...
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