Réalisation - Trammel of Archimedes - ellipsograph
Etape 2
Drill two holes in the wood slat with a No4 bit : one at 1cm an the other one at 5.5. cm of one end.
Glue a wooden pearl on the other end of the slat (or as shown a small wooden dowel).
Drill the centres of the two small wooden pieces with a No4 bit.
With a No8 bit, drill a few millimetres into the hole, enough to fin an M4 nut in.
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