How to use ? - Perpetual calendar
Step 1
Cut a wood slat in 4 parts:
two 17 cm long pieces
two 4,8cm long pieces
Rub the ends with sandpaper.
Step 2
Drill three holes in the two 17 cm boards with a 4 mm bit (the picture shows the locations of the holes)
Step 3
Download and print the file "face_calperpet.pdf" from the blueprints/plans section.
Cut one of the rectangles (the file contains the same rectangle twice if you want to build several calenders).
Glue this rectangle on a cardboard and cut it at the same size.
Step 4
With the help of a center square, mark the center of each sides of the three cylinders.
Next, drill them with a 3 mm bit.
Step 5
Print the file "cylindres_claperpet.pdf" (downloadable form the blueprints/plans section).
Cut out the three rectangles.
Attach the rectangles around the cylinders with adhesive tape.
The adhesive tape must touch the wood to avoid the paper cylinder to turn by its own. 
Step 6
Using 3 screws, attach the 3 cylinders to one of pierced wood board.
You must organize the cylinders in the right order: month / century / year.
Do not over tighten the cylinders to allow them to rotate easily.
Step 7
Tighten the same way the bottoms of the three cylinders to the other board.
Glue the two small boards on the edges to form a frame around the 3 cylinders.
Step 8
The front of the calendar stuck on the cardboard should now be dry.
If it's the case, cut out the three "windows" with a box cutter.
Step 9
Glue the cardboard front of the calendar on the wooden frame.
With a screwdriver, adjust if necessary the height of three cylinders so that the lines are continuous.
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