Brændpunktsskinne til ellipsetegning
Created today
Description
En flad skinne med 11 huller og to pinde, der bruges til at tegne ellipser med en snorløkke på papir. Skinnen ligger fladt på papiret og kan trykkes ned, mens der tegnes. Pindene sættes ind nedefra og låses af en krave i en fordybning.
Remix-muligheder
- Hulafstand: 15 mm i dag. Mindre afstand giver finere trin i excentriciteten.
- Antal huller: 11, med 0 i midten og 1-5 til hver side. Skinnen er 170 × 18 × 4 mm og kan gøres længere ved at øge antallet.
- Pasform: Hul 8,4 mm, skaft 8 mm. Justér 0,1-0,2 mm efter printeren.
- Numre: Graveret 0,6 mm dybt i 3,2 mm høj skrift. Hver enhed svarer til 15 mm fra midten.
- Kombinerer med: En snorløkke på ca. 200 mm og A4-papir.
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