Parametric espresso portafilter dosing funnel
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The last espresso dosing funnel model you'll need
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Model information
- Source
- Printables
- Category
- Kitchen
- License
- GNU General Public License v3.0
A parametric dosing funnel for espresso machine portafilters, to adjust as you need. The included STLs are adjusted for my Lelit Anna portafilter (Lelit’s stupid “57 mm” series) and an “IMS competition” basket, it also seems to work alright with the original basket. I originally made this because I couldn’t manage to find an existing model that fits well, hopefully it can help someone else as well.
Making adjustments
Use the provided parametric FreeCAD model to adjust the model. Have a look at the spreadsheet included in the model for parameter descriptions. At minimum you’ll likely need to adjust: p_diam, p_thick, p_ears_length, p_ears_width.
Export the model to STL and slice; in order to save material and time, I suggest that you use your slicer’s cutting tool to slice only a thin (~7-8mm) slice (pun intended) of the model near the location where it meets the portafilter’s rim, to test the fit and readjust as needed (see provided images as an example).
When you are happy with the fit, slice and print the complete model.
Print instructions
The top side of the funnel should face the build plate, a brim can help with adhesion.
Any layer height should work, although larger values can cause coffee residue build-up. I used 0.16.
Any material should be fine, I printed in ABS (0.16 mm layers, 3 perimeters, 15% infill).