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- From: gcampbel@ecst.csuchico.edu (Gary Campbell)
- Newsgroups: misc.handicap
- Subject: Re: Braille printers and ? plotters;how do blind people 'see' drawings?
- Message-ID: <25802@handicap.news>
- Date: 23 Nov 92 20:17:17 GMT
- References: <25503@handicap.news> <25560@handicap.news> <25622@handicap.news>
- Sender: news@bunker.shel.isc-br.com
- Reply-To: gcampbel@ecst.csuchico.edu (Gary Campbell)
- Organization: California State University, Chico
- Lines: 38
- Approved: wtm@hnews.fidonet.org
- X-Fidonet: Blink Talk Conference
- Originator: wtm@sheldev.shel.isc-br.com
-
- Index Number: 25802
-
- Many braille printers have a "graphics" capability. There is also a
- raised line drawing device which is a piece of rubber over which a sheet
- of acetate(??) is placed. You can then draw on it with a pen and the
- lines raise on the side you are drawing on, not the back, which is one
- of the advantages of the device. It is tricky to draw corners in
- particular as I remember, and I didn't like it much.
-
- It is difficult to get a lot of detail in a diagram of a manageable
- size. Some books from Recording for the Blind that I used when I
- studied electrical engineering came with accompanying raised diagrams.
- These diagrams were produced on a machine used for copying braille
- called a Thermoform machine. It uses suction to mold a heated plastic
- sheet over the dots of a braille page something like the Vacuform toy
- (if they still make the things-- I haven't seen one in 25 years!) RFB
- provides verbal descriptions of the diagrams so that the raised line
- diagrams are not the only access I had to the information, and I
- sometimes found them helpful as an aid to follow the description, but
- not as the primary information source. (Oh yes, one can produce raised
- line drawings on the thermoform by placing wire and such on the machine
- to make the drawings I think, although I haven't been involved in the
- production end.)
-
- I saw a map of the University of Washington produced by Dr. Sherman of
- the U. W. Geography department about 20 years ago. It was pretty
- good, but it was successful because it subdivided areas to very small
- sections, I think about a scale of 50ft/in on 11-1/2 x 11in paper at the
- most detailed level. The thing was huge!
-
- For electronic schematics I prefer verbal descriptions to raised line
- drawings. I think you will probably find varied preferences about this
- here. I was always frustrated because people always wanted to come up
- with raised line drawings in place of the verbal descriptions I found
- most useful. I remember one Mechanical Engineering student who I
- believe used a glue gun to make raised line drawings.
-
- Hope this helps.
-