Vision VISION-64 Betriebsanweisung PDF herunterladen (Seite 69)

Chapter 4 - The Vision Menus 69

3) Casmate SCA file: This file type is created in some of Scanvec’s

programs, such as Casmate or Enroute. This file must be exported from

Casmate or Enroute, not just the saved file. This feature can import 3D files

created in these programs as well as 2D files. The file extension is .SCA.

4) PhotoEngrave PCX (line): This file type is created in almost any

Windows graphics package. It takes a picture file and will engrave it as a

group of lines. The file extension is .PCX.

Guide to using PhotoEngrave:

a) The file must be at a 256 colors or less.

b) Best results come from 256 color or 256 grayscale images.

Colored images are internally changed into grayscales before

photoengraving and give no better results.

c) The photoengrave process assumes that the top color to be cut is

light (white) and the lower color is dark. If the material is dark on

top and light below, you must make a negative PCX file image.

d) Each line of the image becomes a cutter line and as a guide, the

cutter should be 8% of the distance between the cut lines.

Although this will vary slightly depending on the color differential

between the top and substrate colors but for white on black, 8% is

the desired cutter width.

e) Due to the limitations of grinding a fine tip on a cutter, this

means that the smallest spacing practical between cuts is about .01

inches, but as a general guide to start with is .020 apart.

f) The above means that it is best to know the size of the final work

before preparing the PCX image file. The aim is to scan and/or

scale the image down to the required resolution. For a .020 cut

spacing on a 4 inch x 6 inch wide images, the PCX image

resolution would need to be 200 x 300 pixels.

g) The time to cut a PCX file varies greatly not only on size, but on

the color content. White across will cut much faster than dark

areas. It is recommended that you look at the estimated time to

complete a job when pricing it out.

h) The technique of photoengraving tricks the eye into inducing

color variation by area, which is part of the way the human eye

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Vision VISION-64 Betriebsanweisung Seite 69