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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
初学者
45 minutes
说明
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.
此步骤所需材料：
纸1 张所需工具：
台式电脑
喷墨打印机
直尺2
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.
此步骤所需材料：
糊制纸板1 张
兽皮胶10 克所需工具：
双层隔水锅
电热板
涂胶刷
配重4
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.
所需工具：
手工刀
自愈式切割垫直尺5
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.
所需工具：
直尺此蓝图制作
CC0 公共领域
此蓝图以 CC0 协议发布。你可以自由复制、修改、分发和使用此作品，无需征得许可。
通过购买蓝图中的产品支持创客，他们将获得 创客佣金 （由供应商设定），或创建此蓝图的新版本并将其作为连接包含在你自己的蓝图中以分享收入。