New page: hexagonal pattern weights

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diff --git a/source/computer_aided/3d_printing/hexagonal_pattern_weights/01-instructions.jpg b/source/computer_aided/3d_printing/hexagonal_pattern_weights/01-instructions.jpg
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diff --git a/source/computer_aided/3d_printing/hexagonal_pattern_weights/index.rst b/source/computer_aided/3d_printing/hexagonal_pattern_weights/index.rst
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+Hexagonal Pattern Weights
+=========================
+
+.. figure:: pattern_weights.jpg
+   :align: center
+
+.. only:: html
+
+   .. contents::
+
+These are pattern weights made with big washers in a 3D printed casing,
+in a shape and size compliant with the `Stickers Standard
+<https://sticker.how/>`_.
+
+With the washers I can easily source they weight almost 75g and 100g for
+the 3-washers and 4-washers versions respectively.
+
+The bottom is covered with felt to protect the fabric they are used on,
+and the top is decorated with any sticker that follows the Standard.
+
+Materials
+---------
+
+For each weight you need:
+
+* 3 or 4 washers, 38 mm in diameter with a hole of 12 mm diameter and 3
+  mm thick;
+* either :download:`pattern_weight-3_washers.stl` or
+  :download:`pattern_weight-4_washers.stl`;
+* a small piece of felt;
+* a suitable sticker;
+* PVA glue.
+
+If you have washers of a different size you will need to get the
+`openscad sources for the 3d models from git
+<https://git.trueelena.org/3d/craft_tools/tree/src>`_ and adjust them.
+Note that the size of the hexagon is hardcoded at 25 mm in size, and
+thus the washer should be smaller than 20 mm in radius.
+
+Instructions
+------------
+
+3D-print the plastic pieces: any regular filament will do, I used PLA,
+and you can use a relatively dense fill, since there aren't many big
+areas to fill.
+
+Clean the print as needed.
+
+.. figure:: 01-instructions.jpg
+   :align: center
+
+Using the plastic piece as a template, cut an hexagonal piece of felt.
+
+Put the washers in the plastic piece one at a time, making sure that
+they are fitting in correctly: they should end up flush with the border
+of the plastic piece.
+
+Apply a generous layer of PVA glue over the washers and plastic piece,
+let it start to dry a few minutes.
+
+Put the felt over the PVA, press carefully and let it dry completely.
+
+Turn the weight upside down and apply a Standard Compliant sticker on
+top as decoration.
+
+See also
+--------
+
diff --git a/source/computer_aided/3d_printing/hexagonal_pattern_weights/pattern_weight-3_washers.stl b/source/computer_aided/3d_printing/hexagonal_pattern_weights/pattern_weight-3_washers.stl
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diff --git a/source/computer_aided/3d_printing/hexagonal_pattern_weights/pattern_weight-4_washers.stl b/source/computer_aided/3d_printing/hexagonal_pattern_weights/pattern_weight-4_washers.stl
new file mode 100644
index 0000000..b63ba55
--- /dev/null
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diff --git a/source/computer_aided/3d_printing/hexagonal_pattern_weights/pattern_weights.jpg b/source/computer_aided/3d_printing/hexagonal_pattern_weights/pattern_weights.jpg
new file mode 100644
index 0000000..fc4f1d1
--- /dev/null
+++ b/source/computer_aided/3d_printing/hexagonal_pattern_weights/pattern_weights.jpg
diff --git a/source/computer_aided/3d_printing/index.rst b/source/computer_aided/3d_printing/index.rst
index a27c6c0..f84e64e 100644
--- a/source/computer_aided/3d_printing/index.rst
+++ b/source/computer_aided/3d_printing/index.rst
@@ -6,4 +6,5 @@
    :maxdepth: 2
    :caption: Contents:
 
+   hexagonal_pattern_weights/index