Drafting Techniques

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Distinguished Contributor
old-cadaver
Posts: 5,183
Registered: ‎12-12-2003
Message 71 of 102 (91 Views)

Re:

04-04-2003 05:30 AM in reply to: pipe0069
If you're only using CAD as a drafting tool, you're missing a great portion of it's capabilities (just in parts/material control alone). As a DESIGN tool CAD really comes to the front. Being able to accurately model the components for fit-up, then using the same models, address shipping, storage, erection clearances, maintenance clearances, and operation clearances, leaves a hand drafter still playing with his slide-rule. Add to that dropping a complete parts list out at the touch of a button, and hand drafting just can't measure up (pun intended). But hey, that's just me.
*PF
Message 72 of 102 (91 Views)

Re:

04-04-2003 12:27 PM in reply to: pipe0069
'xcept if you think the final product is Paper--- You missed the point!
CAD is electronic... and data can be shipped by phone....
or extracted, modified, re-imported and printed in a way it never was drawn!

-- and I agree- CAD's strong point is Revisions...
It's weak point is startup time (include training if you really want to get
an ulcer)

Still - some people think CAD is sooo much better (really, just sooo much
different)

And (I still think) drawing with a mouse is like drawing with a brick! Hand
drafting is not done with bricks!

Hand drafting's biggest challenges- master the lineweights & lettering -
CAD: organization and filtering information (layers, layers, layers, for
example).

This thread shows no disagreement- just reminiscence of other talents, and
longing to re-introduce some of it (reintroduce this- all us hand-drawn
advocates: Sepia eradicator! UGH - not to be missed!)
*PF
Message 73 of 102 (91 Views)

Re:

04-04-2003 12:32 PM in reply to: pipe0069
snip>> Add to that dropping a complete parts list out at the touch of a
button, and hand drafting just can't measure up (pun intended). But hey,
that's just me. <<

Touch of a button my (edited)! - Keep me out of your over-confident,
all-promising shop!... that's the kind of talk that gets CAD-illiterate
Engineers in hot water---

"... just touch the 'make-it-fit' and 'do-it-yesterday' buttons... have a
set fro sealing done in 10 minutes!"
*Daniels, Steve
Message 74 of 102 (91 Views)

Re:

04-04-2003 04:51 PM in reply to: pipe0069
I agree CAD is an additional draughting or design tool however one thing
that I have noticed especially in my field of architectural metalwork the
biggest problem that has crept into architects schemes is one of if it can
be drawn with CAD then it can be made now the real artform of a draughtsman
is to convert the scheme into a practical working drawing for a fabricator
who can then make it.
I think the biggest problem especially in theUK is the fact that it appears
that few people architects draughtsman CAD operators etc do not have the
experience of drawing on the board before going onto CAD so that they do not
know how to set out a drawing to the correct projection or can see where
there will problems in their design
Steve Daniels
*PF
Message 75 of 102 (91 Views)

Re:

04-05-2003 04:10 AM in reply to: pipe0069
I find agreement with this, too - (Escher-esque designs)

My last employer wanted me to customize ACAD- HVAC work-
I had 4 layers for ductwork -supply, return, exhaust & fresh air/makeup air-
He wanted "wood-stupid" (his words) layering-- all ducts on one layer-
I suggested -
to check 1 duct layer is hit-or-miss
to check 4 layers- air mustpass through Some equipment to enter the next
layer - color coding what's what makes it a 20-second job!

He insisted, now they may as wall be using pencils - "wood-stupid"
Distinguished Contributor
old-cadaver
Posts: 5,183
Registered: ‎12-12-2003
Message 76 of 102 (91 Views)

Re:

04-06-2003 10:03 PM in reply to: pipe0069
We have a heavily customized shop that does drop our parts list to a text file at the touch of a button. Sorry if yours hasn't kept up.
Distinguished Contributor
old-cadaver
Posts: 5,183
Registered: ‎12-12-2003
Message 77 of 102 (91 Views)

Re:

04-06-2003 10:09 PM in reply to: pipe0069
>>one thing that I have noticed especially in my field of architectural metalwork the biggest problem that has crept into architects schemes is one of if it can be drawn with CAD then it can be made<<

That didn't "creep" in with CAD, it was true even in my hand drafting days. We had an Architect we nick-named Escher, because you had about as much chance of building his stuff.
*Daniels, Steve
Message 78 of 102 (91 Views)

Re:

04-07-2003 01:08 AM in reply to: pipe0069
I think that I should have said that it appears
that the instances of "if it can be drawn on CAD then it can be made" are
occurring more often. I suppose it is a case of that CAD is taught rather than
draughting at colleges.
Distinguished Contributor mhr
Distinguished Contributor
mhr
Posts: 122
Registered: ‎12-04-2003
Message 79 of 102 (91 Views)

Re:

04-07-2003 06:45 AM in reply to: pipe0069
I haven't missed any points. CADD is definately way better then manual drafting even when you look at the finished project. Why? because you can plot a fresh copy of the project at any time. Manual drawings will decay and smear over time. I also have never seen a finished manually drawn project that looked consistant throughout all sheets. Each draftsman had their unique style no matter how well the group tried to collaborate. On top of that, most manual documents end up unreliabe because of corrections and on the job changes that never get redrawn, it's not feasable manually. Not to say CAD won't have these problems, but the changes can be made much easier so the integrity of the documents can be maintained.

Sorry, CADD is far better in the end then a human hand with a pencil.
Active Contributor
Wogz
Posts: 36
Registered: ‎06-26-2003
Message 80 of 102 (91 Views)

Re: CAD versus Hand drafting

04-08-2003 01:36 AM in reply to: pipe0069
Hi All

<>br>
Here's my take on all this: For someone like myself, CAD is a godsend. It IS faster, no matter how you slice it. Witheh added commands; stretch copy, rotate, array, auto dims, etc.. it jsut makes things soooo much easier.

<>br>
But, I do agree, that anything hand drawn should be regarded with awe. Nothing can compare tothe feelings of teh lines personally put on paper. I remeber seeing a museum exhibit of archetuctural dwgs fromteh last 50 years. Hnad drawn plans jsut have a certain warmth that CAD will never match. (One dwg I remeber, had little cartoon people! way to cool, and obvioulsy a friday, 4:30pm 'time wasting doodle'!! but added soo much feeling to the building plan.

<>br>
Now I will say this. With the advent of CAD course in school, a lot of 'new designers' figure that if they know CAD, they know how to draft. Not so. I have seen many people like this, just churn out dwgs that are technically.. garbage. And with teh automatic features, one looses sight of what is important, and where things should be placed. Little dertails

<>br>
Hand drafitng taught you not only how to properly represent the idea, but also to be diligent in the details.. It really made you think. Ansd yes, it is a skill that not every one can master..

<>br>
Having read onlyt ehg first 20 or 30 responces, I'm not sure if anyone has asked:

<>br>
What about this new '3d parametric modelling'? Is taht faster than 2D CAD or hand drafting?
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