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Spirographic WDT - starreacher
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A slim spirographic Weiss Distribution Tool (WDT) based on cogs with inserted acupuncture needles
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Model information
- Source
- Printables
- Category
- Kitchen
- License
- Creative Commons — Attribution — Share Alike
Apart from the 3d printed parts the following things are required:
- 4x M3 melt inserts D4.6 X L4.0(https://de.aliexpress.com/item/4000232858343.html?spm=a2g0o)
- 12x Acupuncture needles 0.3x60 mm (https://de.aliexpress.com/item/1005002953770367.html?spm=a2g0o)
- 4x Bearing MR74ZZ 4x7x2.5mm (https://de.aliexpress.com/item/32839200757.html?spm=a2g0o)
- 4x M3 bolt ~ 5 mm
The tool can be assembled as follows:
- Print all parts (I did mine out of PETG on a Mini+)
- Add the holt melt inserts into the cogs
- Use a lighter to heat up one of the needles and push it into one of the holes on a cog. Test the length by mounting just that cog
- Align the top and the bottom
- Put a shim over a M3 bolt, push through the top and screw on the cog through the bottom
- Check the length of the needle on your portafilter
- Snip to required length
- Cut the rest of the needles to the same length and mount them in the cogs
- The top part can fit an optional disk (e.g. CNC machined out of PMMA)