Typical Drafting Mistakes Video

[DQDesign]

Hi All,
I made a video regarding typical drafting mistakes for promotional purposes. Let me know what you think?
The top 10 mistakes made in CAD and Drafting!

https://youtu.be/mFexppVTopY

 

[drawoh]

DQDesign,

I have just watched your video.

Faking Dimensions: I have encountered AutoCAD files with dimensions exploded and re-typed. This to me is an immediate firing offence. There is a message thread in the SolidWorks forum (I can't find it) about somebody replacing the <DIM> tag with typed dimensions, again, an immediate firing offence.

Scaling: I spent fifteen years on a drafting board, and I have a number of triangle drafting scales. I have prepared drawings to match those scales. If I were installing SolidWorks from scratch, I would implement two title blocks, a portrait[&nbsp;]A[&nbsp;]size, and a landscape[&nbsp;]B[&nbsp;]size. I would set the standard font to 2mm, and the titles to 3mm. These drawings can be printed off and stored in a three-ring binder. They display nicely on a 1080p[&nbsp;]monitor. These are becoming common on production floors. E[&nbsp;]size sheets solve problems on drafting boards. I do not see any problem with weird scales. It would be nice if drawing scales were restricted to the ones on drafting scales, but how many designers these days own one? Again, this matters on a drafting board. In 2D[&nbsp;]CAD, you model and draw at 1:1[&nbsp;]scale, you insert the title block at 1/scale, and you plot at the scale. Any other way is very stupid.

--
JHG

 

[MGZmechanical]

I do not know where it goes exactly but in my experience younger drafters build the 3D models correctly and they are quite good with the 3d tools. But then they take little care about 2D drawings. They just "throw" views and put a lot of dimensions (and duplicate them) but do not take much care about tolerancing or wether those views are the proper ones to define the product (I think maybe this come from drafting schools more focused on teaching cad programs than drawing conventions and standards). Old school drafters still pause for some time and think of the drawing configuration.

In the video vou mention the other two big elephants: fake dimensions and bad geometry. I would also mention that today with 3D systems it is possible to check the assembly in different positions (open, close) and check interferences and so on in all the positions. And many times this is not properly checked loosing some of the advantages of 3D.

Regards and I will share it with my colleagues.

 

[Tarator]

I would understand to have engineers and drafters maybe in Civil Engineering/Architecture. But I do not understand why a company would need a CAD designer and a mechanical engineer. To me, it does not make sense.
MBD or PMI is getting more and more popular every day. However, blueprints (1:1) are still needed on the production floors. At least, it is a lot faster (almost a single click) to convver it to a 2D drawing once you have your MBD/PMI complete in your CAD system.

 

[DQDesign]

Thank you for the views and comments! I really appreciate the feedback. I come from 1 off type design projects and the fabrication process is decoupled from the engineering departments for open bidding etc. So a drawing still matters in terms of convention. In larger organizations where many people have access to the drawings they tend to take a shot at drawings without prior training. So these things are all still common. I love the modern takes on scaling, simulation and MBD PMI conversations. These are things I'm always wanting to understand how others go about their design process. Where this industry is headed will really be interesting over the next 50 years. Putting this video together made me think about how far we've come and what we've left behind.

 

[BUGGAR]

A special appreciation for your attention to sloppy geometry and faking dimensions. Especially since I go directly from the drawing straight to a dxf file and into to the waterjet cutter. A little error leaves you with little more than a garden ornament (I have several.)