IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
Printed Protractor on Pasteboard
A protractor is a half circle divided into 180 degrees. Drawn in millimetres on an A4 page with an 80 mm radius, every degree mark is about 1.4 mm apart, enough to read to a degree. Printed at actual size and glued to stiff pasteboard, it measures as well as a shop one for paper and wood work. A 100 mm check line on the sheet catches a printer that shrinks the page.
Download: /uploads/blueprints/protractor-a4-180.pdf
Olùbẹ̀rẹ̀
45 minutes
Ìlànà
1
1
Print at actual size
Print at actual size
Download /uploads/blueprints/protractor-a4-180.pdf and print it with 'Actual size' (100 %), never 'Fit to page'. Measure the check line: it must be 100 mm.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Bébà1 ewéÀwọn irinṣẹ́ tí a nílò:
Kọ̀ǹpútà Tábìlì
Ẹ̀rọ ìtẹ̀wé olùfún tádì
Ìdíwọ̀n2
2
Why actual size matters
Why actual size matters
Printing a measuring sheet so it stays true.
3
3
Glue to pasteboard
Glue to pasteboard
Brush warm hide glue thinly over a piece of pasteboard, lay the print on it, smooth it from the middle out and press it flat under a weight until dry.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Pátákó bébà lílẹ̀1 ewé
Ìlẹ̀mọ́ awọ ẹranko10 gÀwọn irinṣẹ́ tí a nílò:
Ìkòkò méjì onímí omi
Pátákó Gbígbóná
Búrọ́ọ̀ṣì ìdìpọ̀
Ìwọ̀n4
4
Cut it out
Cut it out
On the cutting mat, cut along the straight baseline exactly and round the arc a few millimetres outside the marks.
Àwọn irinṣẹ́ tí a nílò:
Ọ̀bẹ Iṣẹ́ Ọwọ́
Àwo ìgé tí ó ń wo ara rẹ̀ sànÌdíwọ̀n5
5
Check it
Check it
Measure the baseline from the 0° mark to the 180° mark through the centre cross: it should be 160 mm. Check that 90° stands square to the baseline.
Àwọn irinṣẹ́ tí a nílò:
Ìdíwọ̀nÀwọn ohun-èlò
3- 1 ewéÀyè
- 1 ewéÀyè
- Àyè
Àwọn irinṣẹ́ tó nílò
9- Àyè
- Àyè
Ìtọ́nisọ́nà yìí ń ṣe
Blueprint tó jọra
Àwọn blueprint wọ̀nyí pín ìmọ̀ — ọ̀nà, ohun-èlò tàbí ìlànà
CC0 Àgbègbè Gbogbogbò
Blueprint yìí ti jáde lábẹ́ CC0. O lè ṣe àdàkọ, yí padà, pín, àti lò láìsí ìyọ̀ǹda.
Ṣàtìlẹ́yìn Olùṣẹ́dá nípa rírà àwọn ọjà nipasẹ̀ Blueprint wọn Ẹ̀san Olùṣẹ́dá tí àwọn Olùtajà gbé kalẹ̀, tàbí ṣẹ̀dá àtúnṣe tuntun ti Blueprint yìí kí o sì fi sínú Blueprint rẹ gẹ́gẹ́ bí ìsopọ̀ láti pín owó-wíwọlé.