Comments on: Make a Sector From a Crappy Folding Rule

By: mgreene93

mgreene93 — Sun, 28 Apr 2013 02:36:13 +0000

Did anyone ever find a cheap ruler to use for this project? I can find some old Stanley’s on ebay, but nothing like the one that Chris used.

By: StratMan9000

StratMan9000 — Wed, 04 May 2011 20:59:47 +0000

Ok, thanks both. My latest obsession has been 0.3mm mechanical pencils. Right now I’m using a Pentel Graph1000, which I think might not be distributed in the US. I want to try their GraphGear1000 sometime. Seems very nerdy.

Anyways, watching the video again, I saw the 0.3mm printed on the pencil.

By: rincewind03060

rincewind03060 — Wed, 04 May 2011 01:04:51 +0000

I would expect the pivot point for the sector to be the center of the hinge pin and that would be the starting point for the 13 divisions. The drawings in the article show the first increment marked from the outside edge of the hinge pin. Am I missing something?

By: EricArey

EricArey — Sat, 30 Apr 2011 10:48:20 +0000

It’s an Alvin Draftmatic 0.3 mm.

By: lwilliams

lwilliams — Thu, 28 Apr 2011 03:37:54 +0000

Why 13 divisions?

By: blaisepascal

blaisepascal — Thu, 28 Apr 2011 00:58:36 +0000

It looks a lot like the 0.3mm Koh-i-Noor drafting pencils I used to buy (and lose, so I stopped buying $10 pencils). The color is wrong, and it looks like Koh-i-Noor no longer makes that model.

It’s a dead ringer for an Alvin Draftmatic 0.3mm technical pencil, which looks exactly like my old red drafting pencils, except yellow.

By: Christopher Schwarz

Christopher Schwarz — Thu, 28 Apr 2011 00:52:54 +0000

It’s a .3mm. No idea on the brand. The one they had at the art supply store.

By: Christopher Schwarz

Christopher Schwarz — Thu, 28 Apr 2011 00:52:29 +0000

The length of the divisions on a sector are immaterial as long as they are identical. The divisions on this one were stepped out so I could create 13 divisions. That is all that is important.

By: StratMan9000

StratMan9000 — Thu, 28 Apr 2011 00:12:32 +0000

2 questions: 1. What size pencil lead is that? 2. What model pencil is that?
I’m guessing it’s a 0.3mm?

By: Miller

Miller — Wed, 27 Apr 2011 23:51:09 +0000

So……., would one use a sector to create the subdivisions on the sector one was trying to create, and if so, where did the original sector come from? well?