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Similarities Between Manual and CAD Techniques

10/16/2017 12:54 PM

What are your thoughts?

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#1

Re: Similarities between manual and CAD techniques.

10/16/2017 12:58 PM
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#2
In reply to #1

Re: Similarities between manual and CAD techniques.

10/16/2017 12:59 PM

I do not have the money. What are your thoughts?

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#4
In reply to #2

Re: Similarities between manual and CAD techniques.

10/16/2017 1:24 PM

How about checking your local library?

I took drafting in high school in the 80's. My thoughts are that you can do a lot more in much shorter time with CAD vs. manual drawing but there is something about old school drafting, like a lost art.

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#3

Re: Similarities Between Manual and CAD Techniques

10/16/2017 1:06 PM

I started out with a T-Square and a drawing set in college. It's come a long ways since then.

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#5

Re: Similarities Between Manual and CAD Techniques

10/16/2017 1:28 PM

I have a comment regarding one distinct difference:

I’m seeing more and more instructions and templates provided by manufacturers that have been drawn by an individual who seems to understand how the CAD program works, but has no understanding of shop or field practices, has little understanding of good drafting practices (like GD&T), and has likely never seen (let alone installed or assembled) the subject item.

There is an art to producing good drawings – understandable, accurate, readable – this very much seems to have been lost with computer generated drafting.

And, I don’t know why this is. Sad, really.

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#15
In reply to #5

Re: Similarities Between Manual and CAD Techniques

10/19/2017 8:36 AM

The chemical manufacture I first worked for had a sensible policy with new drawing office staff. They spent the first three months on the shop floor with the guys that they would be giving drawings to in the future.

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#6

Re: Similarities Between Manual and CAD Techniques

10/16/2017 1:48 PM

My thoughts.

You are a student looking for someone to do your assignments for you.

Try these sites:

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If you have no idea how to answer your own questions, you should change majors, or quit wasting your time in school and get a job in construction. That will be the quickest and best means to getting an understanding of construction methods and materials.

Today, there are no similarities between the two, aside from the 2D drawing you print out at the end of the day.

Do you know how to sharpen a drafting pencil? Have you ever used one? How about a drafting table and a T-square? French curves? Circle templates?

In mechanical drafting, there is no delete/erase/modify/stretch/hidden line/layer/text style/fill/hatch, or print/save buttons.

CAD operators are appliance users with little or no appreciation of materials of construct, bills of materials, material composition/strengths/life expectancy, etc.

The appliance user has all this at their disposal without ever having driven a nail or chipping out cured concrete, and without any real appreciation of what they may be creating, except a pretty picture on the cover page.

They are two different worlds.

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#8
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Re: Similarities Between Manual and CAD Techniques

10/16/2017 2:47 PM

I still have (and on rare occasion use again) my Deitzgen Master set. I have somehow (somewhere in the last 40 odd years) managed to lose the compass beam. Oh well, never used it very much anyway.

I still have at least one truepointer, too... I hope I remembered to dump the graphite cup before storing, that'll be a mess!

Reminiscing about the marvelous ammonia smell from the diazo machine... eradiactor fluid... ah, the good old days!

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#10
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Re: Similarities Between Manual and CAD Techniques

10/16/2017 3:22 PM

I had a desk in a room full of mechanical designers, along with a couple of other engineers.

Due to the scope of the project, many were "job shoppers." I remember the room was always full of cigarette smoke, most of the shoppers were looking for their next job from their first day on this one, lots of them had attitudes, because of the secrecy of our work, none of them knew what we were building and weren't aware of the ultimate operating environment, the sound of electric erasers on Vellum, after an engineer called his designer to say, "We need to change the xxxx to fit into the xxyz box."

And one of the favorite sayings was , Never draw more in the morning than you can erase in an afternoon."

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#7

Re: Similarities Between Manual and CAD Techniques

10/16/2017 2:46 PM

So for example, a Manual drawing would be used for trying to visualize a room layout to the foreman on the job. Then a CAD drawing is to make official changes that would represent the finished product?

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#9
In reply to #7

Re: Similarities Between Manual and CAD Techniques

10/16/2017 3:06 PM

Sure, but depending on the complexity of the site works a proper 3D CAD visualisation drawing may be a better option.

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#11

Re: Similarities Between Manual and CAD Techniques

10/16/2017 3:24 PM

You're not paying attention to what you're being told. You don't seem to understand that Manual Drafting and CAD drafting are NOT usually used concurrently. Can you imagine how mechanical drawings were made BEFORE CAD systems existed? It is analogous to multiplying two numbers together on a piece of paper vs. using a calculator. CAD drawings do all of the trigonometry and geometric creation for you. Manual drafting forces you to THINK about how a line is drawn, to what angle, to what length, third-angle projection, etc. CAD drawing is faster for sure, but Manual drafting is truly a dying art that no one seems to appreciate anymore.

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#12

Re: Similarities Between Manual and CAD Techniques

10/16/2017 4:01 PM

CAD is just a tool, no different than the word processor that I am using to write these words. Drafting is just a means of communication with its own vocabulary and grammar, just the same as the English language that I am writing this in. What is important, is not the tool that I use to express my ideas, be it a computer keyboard, or a pen on paper, but how well and clearly I present my ideas in a manner that you can understand.

I write this from 50+ years on both sides of the drawing board, both as a tool maker, and as a tool designer.

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#13

Re: Similarities Between Manual and CAD Techniques

10/16/2017 6:16 PM

To answer "Similarities Between Manual and CAD Techniques", I am going to say only a few basic ones; making sure the details are correct and that you are drawing to-scale. Beyond that, similarities end.

This seems an odd question to ask, being that manual drafting is seldom used any more if at all.

The biggest advantage of CAD is the time saved in making revisions/corrections as has been already mentioned/alluded to by more than a few here.

Hey! Why this particular question?

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#14

Re: Similarities Between Manual and CAD Techniques

10/16/2017 6:46 PM

767 and 777

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