Re: Machinists! Isometric/orthographic drawings!
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Sean the Nailer</div><div class="ubbcode-body">"TBJ"
In short, look at your scale/graph dots. On your ortho #2, each view is 3 spaces by 3 spaces by 3 spaces. Yet, on your iso attempt, (and good on ya for trying btw) you have a base that is 2 by 2 with a height of 4.
Remembering that you can only see 3 sides of a die (one of a pair of dice) at the most, at one time, this is another method of extrapolating it into mechan-o-speak.
Just start with that, and then it won't take long for you to see it. My thoughts are, you're trying too hard.</div></div>
The die idea is really good. All this time I've been trying to play Bob the Builder and picture these big fictional ominous blocks in my mind but to relate it to something real and more familiar is a huge help. I'm gonna use that method on my exam next week.
Yeah I boogered that second one pretty good but I'd been buried in that book for about 4 hours at that point and didn't have much left in the tank. Normally I'd cross reference with the orthos when I'm finished to make sure everything's where it should be. I just ran outta steam and closed the book before finishing but the other pages were covered in lines, numbers and notes so this was the cleanest example I had(definitely not used for accuracy because I'm mildly embarrassed to even post this particular page with all these errors but this isn't something I'd turn in for a grade). It's easy to lose yourself in the grid and end up drawing a stack only to discover it didn't go where you thought it would; in the case of #2, that stack of 3 was supposed to go behind all the 1s and I knew this before drawing it but it obviously didn't come out this way. Tomorrow when my head is clear I'm gonna scratch most of that page and do it again. I've never had much of a creative imagination so this course is gonna be a big help and a big challenge at the same time.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: athhud</div><div class="ubbcode-body">The most simplistic explanation I can offer (it may not make a bit of sense in text) is to simply rotate each view 45 degrees on each axis as it would be viewed in the isometric. Draw each angle as it would appear by itself, while ignoring which lines should and shouldn't be seen. It makes more sense in my mind to start with the bottom layer an work your way up. After all three angles have been transposed, then you can begin analyzing which lines should be erased from your point of view. I hope that makes some sense and helps. If not, I'm not surprised as my mind doesn't seem to work the same as most.</div></div>
This is very close to the way it was explained to us. The issue is visualizing and extrapolating those angles into three dimensions when only given separate two dimensional views to work with(assuming I'm understanding what you're getting at). Going from isometric to orthographic was very easy for me to pick up but this is more challenging.
With enough time and effort I can put together a correct drawing but only after a lot of erasing, brooding, cursing and migraine inducing critical thinking. Once the breakthrough is made it becomes second nature cuz my instructor flies through those like 3rd grade addition problems.
For now, I'd be content to cut down on the time but I suppose that comes with an understanding of the concepts. I will keep that die idea in mind and that's exactly what I was looking for when I posted so thank you; it made more sense than you give yourself credit for.
