Fonctionnement - Pantograph
If you place a drawing on the board and follow its lines with the wooden pointed pin, the drawing will be reproduced 1,5 times bigger by the pencil.
By reversing the pencil and the wood pin, you can decreasing 1,5 times the drawing's scale.
If you change the distances between holes (here 15 and 22.5 cm), the scale is modified.
The problem with this DIYs project is that the weight of the pencil is often insufficient and it marks too lightely the paper. Using a marker, solves partly this problem.
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Bonjour, Les pantographes professionnels ou les jouets permettent de modifier le placement des éléments pour obtenir des échelle différentes (barres coulissantes). Le rapport de 1,5 concerne donc votre modèle en particulier et n'est pas une valeur absolue. A part cette pet...