Hi ttrw,
ttrw wrote:First, I would like to ask who has had training in industrial orthographic draughting
I did at college, but that was nearly 30 years ago.
ttrw wrote:Steve, ansering your first question, there should be no colour whatsoever in 2D orthographic drawings because the outcome is to inform (and this is based on a 'military' style code of practice) only. So taking into consideration that the simplest of plotting is either an A4 piece of paper and an HB pencil and a rubber (eraser). OR a plotter/ printer that ONLY contains black ink. I really don't know why Tim chose Yellow, because even printing yellow on a white background is bearly visable too :confused:
Plotters/ printers can/will ignore color within a drawing and simply print all as black, but do agree that yellow is a bad choice of color and did actually think I would of been able to change that default within the settings and hope it will be changed so it can be defaulted to a different color.(while I have playing with the model to sheet, I have changed the background to gray)
ttrw wrote:Hidden lines are shown as black dashed lines (and NOT in yellow), whereas axis are shown as black dash-dot lines. AutoCAD often shows different layers in different colours because the background is black (although this can be reversed), it is far easier to 'see' drawings on a black background (this is my and many others opinions).
How hidden lines / center lines are presented (and I dont mean color) is not down to opinion, it is down to standards. Personally I would only expect color changes made due to the layer used and those colors fully definable by the user.
ttrw wrote:By using dashed black lines where you are 'seeing' through a model, it is possible to 'see' through a solid object, drawn in 3 views;
Well yes, that is what I put forward as I did think from your post that you where putting forward that you had been informed that hidden lines should not be shown
ttrw wrote:If you look in Shark/ VC you'll find that these are the standard default views; command- 1, 2 and 3.
It is standard for the 3 views, it is just a case of what projection is used (1st /3rd) as to where the views are placed in a 2d drawing.
ttrw wrote:If sketches are done this way then you only need 3 views to see the 3D object in 2D. It is also impotant that you can visualise in 3 dimentions- easily, as this helps a lot.
There should be no "if".
I know there have been a lot as changed over the years, even to a point where at (quite a lot of) times there is no projection views created, a 3d model is sufficient and is actually what is wanted.
ttrw wrote:I'll post some examples soon.
Should be interesting.
- Steve