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RE: Tips And Tricks for CAD Programs. - 12/22/2005 10:41 PM   
SydDythers



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I actually created the outlines first and then created the ellipses using AutoCad. To get the outlines I imported an image of a 3 view and then traced it using polyline in Acad.

Hope it helps,

John

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RE: Tips And Tricks for CAD Programs. - 12/23/2005 2:26 AM   
USAce777



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Status: offline 		Thanks!

you trace the 3 view drawing by hand??? or also???

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RE: Tips And Tricks for CAD Programs. - 12/23/2005 3:50 AM   
USAce777



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Status: offline 		I started a new drawing...
Took some 3 Views...
Still in progress....
Think this to going to be my first draft of Extra 300 plans in 3D.

This forum helped me alot!!!

Bye

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< Message edited by USAce777 -- 12/23/2005 3:55 AM >

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RE: Tips And Tricks for CAD Programs. - 12/24/2005 9:34 AM   
Mike James



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Status: offline 		After losing my shirt and going deeply into debt, trying to do fabrication, I'm now completely out of that part of the business. But, I've collected all that data from the past few years, and am selling two CD's for modelers.

The first one "How to do Everything", Volume One, deals with introductory CAD, related to designing and building composite model aircraft.
The second one, "CAD for Modelers", is exactly that. I try and present the material in a generic way, so that intermediate users of any CAD/3D program can use it. More info, including downloadable preview movies, is at http://www.nextcraft.com/nextcraft_products.html

Lots of photos, tips, animations, info on shaders, lighting, structural considerations, RC installation, etc..

I think these will be usefeul to CAD users with an interest in RC model design.
Take care, and happy holidays, everybody.


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RE: Tips And Tricks for CAD Programs. - 12/28/2005 11:52 PM   
jerry dotson



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Status: offline 		Guys there is a screen capture FREE that works sooo good. Several ways to do it...I use the draw a box with the mouse to capture just what I want. In the initial setup you choose the sfile to save to and filr type...jpg, bmp or tif. The link is......http://www.wisdom-soft.com/products/screenhunter_free.htm I really like it. IT takes about 5 seconds to capture and save it.

Jerry

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RE: Tips And Tricks for CAD Programs. - 12/29/2005 3:17 AM   
BMatthews



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Status: offline 		Mike, does this mean no propjet? Or just no production of it? I was looking forward to seeing this thing in some vid's.

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RE: Tips And Tricks for CAD Programs. - 12/29/2005 3:25 AM   
Mike James



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Status: offline 		Yes, I announced this on my site almost a year ago. None of the projects shown on my site will go any further.

Due to the high cost of manufacturing these in the U.S., the tremendous amount of loss and debt it cost me (and others!) as well as some adverse health effects, I am entirely out of the fabrication business. I will only be using that data to try and recover, by producing some CD's, two of which are already available. ( http://www.nextcraft.com/nextcraft_products.html )

Best wishes to everyone who has followed these projects. Regardless of the ultimate "failure" of the actual kit process, I enjoyed the learning and sharing process with all of you. Happy holidays!


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RE: Tips And Tricks for CAD Programs. - 2/6/2006 10:59 PM   
Kelsey_B


 

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Status: offline 		Here is a sample of parts i drew from a Royal Corsair kit. It was hard to get and I wanted to preserve it the best way I could. I also enlarge to any size I want.

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Click to see the file in new window.Attachment.pdf Click to see the file in new window.Attachment.pdf Click to see the file in new window.Attachment.pdf


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RE: Tips And Tricks for CAD Programs. - 3/6/2006 5:20 AM   
harsh


 

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Status: offline 		hi every body
well this is my 1st post on the forum and i would like to know how to start designing in autocad2005 with a basic 3 view drawing ??
I have designed 1 model in delta cad .
regards

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RE: Tips And Tricks for CAD Programs. - 3/7/2006 3:58 AM   
omcusnr


 

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Status: offline 		Lot of differnt info going on in here. One of the things I like best about using cad for DRAFTING (not 3-d design) is the use of layers. Layers are one of the greatest tools in the cad package, and often misused or under used. We get so excited & start drawing and wind up putting everything on one layer & then the drawing is so clutter, its a mess. Use layers. Pick a lyering convention that works for you and other can understand if you're sharing your drawings. Us names if at all possible, not#s. Things like image (for the 3-view import), dims (for dimensions), fuse-formers, fuse-skin, wing-ribs, wing-skin, details, hinges, motor (engine) fuel-sys, centerline, layout-lines, etc.

One other thing thats often not realized, is cad is "real world". You draw things the size they will really be in the real world (if its a foot long in the real world, its a foot long in cad). If its a mile high, or a nanometer wide, this is how you draw it. When you plot/print is when you scale. If you keep this in mind, its easier to catch blunders in your drawings. If the dimension string the computer is returning doesn't add up to what you think it should be, you've got a RED FLAG! Don't ignore it, something is wrong (one of the jokes around my office is that an architecht is an engineer that can't add - just erase the number & make it fit - it looks good on paper, right?).

Modeling stuff in 3-d is pretty, but its no tha' way to build an airplane. Flat plans are how we cut the parts out.

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RE: Tips And Tricks for CAD Programs. - 3/8/2006 2:26 AM   
N1EDM



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Status: offline 		Good point about the Layers. I have a convention that has a separate layer for all text, another one for reference and construction lines, etc. I saved all of this in a template called acad.dwt . Now, whenever I start a new drawing this template automatically loads - it's the default template. Then, I add as many additional layers as I need...

Hope that helps somewhat....

Bob

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RE: Tips And Tricks for CAD Programs. - 3/8/2006 2:54 AM   
Mike James



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Status: offline 		2D tools are sometimes extremely useful. Ask any graphic designer if they can live without Photoshop's layers! But, modeling in 3D has many attributes, aside from producing nice renderings before the model is built.

My CAD software ("Carrara Studio", from http://www.eovia.com ) allows you to create and extract 2D cross sections from any 3D model, serving the purpose of creating part templates for plans. That's especially handy when you DON'T have good 2D drawings to start with, and want to model something that's either unknown, or original. In fact, if you're reverse-engineering an object, the 3D reflections and shadows can be compared to photos of the actual object, which helps more than you might think, in recreating the thing. I like being able to rotate the entire model (or any sub-assembly) in real time, and see things that I might miss when looking through several 2D drawings from different viewpoints.

3D also lets you quickly move internal parts around inside the model, checking their fit against the outside surface at a glance. You can "duplicate and reverse" 3D parts (with Boolean operations) to experiment with various mold configurations, test things with moving parts, (such as landing gear doors and hatches) and even try different color schemes, which you and your clients might appreciate. By using color-coding, you can see the difference between structural and non-structural parts, at a glance, for example.

And... Depending on the accuracy of your modeling skills, you have parts which can go direct to CNC at the end. Boeing and Lockheed-Martin use "Catia", and nearly all architects have been using 3D (AutoCad and others)for quite a while now. Burt Rutan uses the Ashlar products. 3D is a great tool, as long as your software fits the tasks you're doing.

For an average-budget modeler, many of these are too expensive, but new affordable alternatives are being produced all the time, and since I grew up in a time when we had NO graphics, I really appreciate the power of these products.


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RE: Tips And Tricks for CAD Programs. - 3/8/2006 6:13 AM   
853633



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quote:

ORIGINAL: Mike James



My CAD software ("Carrara Studio", from http://www.eovia.com )
Depending on the accuracy of your modeling skills, you have parts which can go direct to CNC at the end. Boeing and Lockheed-Martin use "Catia", and nearly all architects have been using 3D (AutoCad and others)for quite a while now. Burt Rutan uses the Ashlar products. 3D is a great tool, as long as your software fits the tasks you're doing.


quote:



For an average-budget modeler, many of these are too expensive, but new affordable alternatives are being produced all the time, and since I grew up in a time when we had NO graphics, I really appreciate the power of these products.



Mike -

Looks like you've been doing this a while, your web site looks good! now, what i need is an honest answer, of all the many different cad programs out there, what would you (or any one else) recommend to a novice arf builder, considering on designing there own stick build (I have some ideas, that I want to fly)? also, you talk about cnc? what is that? and vacuum forming? Not sure, but I think that's a little commercial, and almost make's me want to stick with arf's.... I was on e-BAY last week, and won an auction- the guy said theres a cad program or reader with it, and I can size the plans to my liking, got me thinking.... I guess I'm looking for healthy input...


Thank you in advance,

Tony Zurenda

Harpursville, NY USA






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RE: Tips And Tricks for CAD Programs. - 3/8/2006 6:41 AM   
Mike James



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Status: offline 		Hello Tony,

About CNC and vacuum-bagging and/or vacuum-forming:
CNC is "Computer Numeric Controlled"... What most of us are used to seeing in "milling machines". It's a process where your 3D model file can be used to enable a machine to carve out parts from solid objects... Wood, foam, metal, or whatever.

Yes, those are subjects that only people who want to make at least a few "kits" would be interested in. If you're building strictly "stick-type" kits, then physical prototyping is probably much cheaper than CAD.

About "Which CAD program?":
I answer this the same way as a photographer wants to know "Which film do I use?" (The photography analogy is "If you want to end up with transparencies, use transparency film, and if you want to end up with prints, use print film... Typically, don't try and convert one to the other.)

What that means, regarding CAD, is that you should purchase the CAD software that accomplishes what you need as a final product. If you're just making images for visualization and/or advertising, your CAD software doesn't need super-advanced capabilities. But if you do intend to go to CNC, or to other kinds of computer-controlled assembly, then the best choice will be one of the high-end programs such as those mentioned in my previous post. AutoCad has been the default standard for many years, but today there are also other choices.

If I was positive that I'd only be building "stick-type" aircraft, I'm pretty sure I'd stick with physical prototyping (and jigs) and would only use CAD for concept illustrations and possibly advance advertising.


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RE: Tips And Tricks for CAD Programs. - 3/11/2006 11:09 AM   
Rikard Levenstam


 

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Status: offline 		Hi All..

Take a look at my project.. CAD/CAM for everything... www.modellbyggeriet.se/sukhoi

/Rikard

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RE: Tips And Tricks for CAD Programs. - 3/13/2006 4:03 PM   
Balsa Shavings



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Status: offline 		Hi Fellas: Just Got My New TurboCad 9.2 From Overstock.Com. Boy Do I Love It, It's So Much Fun. Snapping & Arcing, Splines, Beziers, Sure Beats the Heck Out Of A Paper & Pencil. My First Attempt For Designing An Airplane Is A Simple Pod & Boom Electric. Constant Cord Flat Bottom Wing, It is Going Very Well. One Question Though, What Percentage Of The Wing Should The Horizonal Stabilizer Be?

Keep the Faith: Johnny


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RE: Tips And Tricks for CAD Programs. - 3/13/2006 7:22 PM   
Mike James



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RE: Tips And Tricks for CAD Programs. - 7/6/2006 3:29 AM   
RCBuilder42yrs



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Status: offline 		Mike,

Have you heard of a program called "Rhino3D". Was talking to Olaf Weidner from Germany and this is the program he used to design the "Raven" all the way up to a 70% of Scale model! The big one has full scale type motor mount. Wood model with Formers which he designed in the program.

I still haven't seen in this thread a way to "Import" 3 views or even a Picture of the full scale so you can Trace the outlines?

Can somebody share how this is done, in any of the CAD programs or do you simply X and Y all the points along the line until you have a drawing.. YUK!

At this point I'm looking for Short cuts, as Mike indicated earlier in the thread, for most Stick models, its quicker to draw an outline on "Butcher" paper, lay the longerons in there to form the Box and cut the formers to fit. But I would like to learn how do do the same thing in Some CAD program. This Rhino3D sounds like its the Kind of TEA I like to drink.

"Like Sand on the beach, so is the Balsa dust in my shop!"

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RE: Tips And Tricks for CAD Programs. - 7/6/2006 3:43 AM   
Mike James



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Status: offline 		Aside from the price of CAD software, which can vary widely...

What is "great" for one person is "junk" to another, sometimes. I've heard of "Rhino", but haven't used it, simply because I'm happy with my software. ( "Carrara Studio" ) Each piece of 3D software is similar in general ways, but different in the details, so it's really tough to recommend something as "the best". It depends on what you can afford, what functions well with your particular computer, and what you ultimately are able to do with it.

AutoCad is the defacto industry standard, but it's expensive, and not every hobbyist modeler needs something that pricey. If you're able to do it, I'd recommend some of the trial downloads available from the various companies, as well as having a look at their "sample projects", tutorials, screenshots, etc.. Better yet, if you have a friend who will let you play around with their software, you may be able to get a better feel for what the software can do. For me, the mid-priced software has been fine.

Good luck with this sometimes-tricky decision.

< Message edited by Mike James -- 7/6/2006 3:44 AM >


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RE: Tips And Tricks for CAD Programs. - 7/6/2006 7:22 AM   
Rikard Levenstam


 

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Status: offline 		Hello, I have used Rhino for some years ago, now i work on a company selling PowerSHAPE from Delcam. Rhino is a surface modeller and works with nurbs mathematic. Rhino is quite good if you would like to work with shapes and design job, as nice aircraft design. Ig you should do mechanical construction, or design squared things a solid modeller is much better, like Solidworks or TopSolid from Missler, because of parametric control. For hobby design, rhino is excelent, also the tutorial inside rhino is very good and easy to understand. Also rhino is a very stable software. I think it is realy hard to find a good working CAd software that is less expensive than Rhino !

I'm almost finished my fully CAD/CAM Sukhoi, maybe maidenflight at saturday...

www.modellbyggeriet.se/sukhoi

/Rikard

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RE: Tips And Tricks for CAD Programs. - 7/6/2006 7:26 AM   
Rikard Levenstam


 

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Status: offline 		Ohh the question... Yes in Rhino you can have a picture as background and sketch a curve on the picture. There is some software converting PDF into a dxf curve file automatically, also some software can convert a Jpg, bmp into vectors and could be exported!

ArtCAM from Delcam can do this, but expensive to buy just because converting one jpg.. If you need anly a few number of convertion, mail me and i´ll help you to convert picture file to curves for free.

/Rikard

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RE: Tips And Tricks for CAD Programs. - 7/9/2006 7:09 PM   
Betterfly



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Hi

I' a new kid on the block. I found the topic quite compelling since I'm a CADee myself. Many of the comments are true. My experience has taught me, there are different ways to address the problems; it is all about the end product and how much effort you want to invest.

For some individuals having little funds available is hard to commit to good CAD program since are not cheep. The other day I read that major venders are considering giving away their 2D CAD software for FREE. A comment was made, that this will cause client who have invested the full price of software like AutoCAD LT an up roar.

Keeping on the subject of free CAD software I have posted some CAD alternative software that is available for free. e.g. Google is giving away a 3D package for the public. I have not personally investigated the software myself, but this is just a sample of what is out there for those who can not afford and want to find out if this is for them.

As one mentioned AutoCAD is widely accepted as the common format. Really to be compatible is the focus, a DWG format is the norm. Many other packages now support this format making it possible to afford 3D capability if you so choose it.

For some of you out there, RE: capture image, I have been using SNAGIT. This will do more than just screen capture. You can annotate or edit the image and much more.

I am presently designing a craft of different origin. My design is basic because it is not proven yet. All I have to do is test fly. It is a concept that is old with new, and not common.

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RE: Tips And Tricks for CAD Programs. - 7/28/2006 7:22 AM   
Rikard Levenstam


 

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Status: offline 		Hello!

here you can find a very god surface/solid/mesh modelling saftware for free! This is the free version of what i have used! For free you can use all tools in the software and also save your file. In the -E version it is not possible to export the file to any outher softwares without bying a voucher from Delcam, but for desigt and printscreen and snagit, this is an excellent version!

http://www.powershape-e.com/

/Rikard

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RE: Tips And Tricks for CAD Programs. - 7/28/2006 5:07 PM   
Betterfly



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Status: offline 		Richard
Thanks for the link I will add this to my page of freebies. I visited your site; the Sukhoi is quite a project. The detail you invested are well done. I noticed you have quite a set-up milling machines for mold making and the ability to from parts. A dream I would like to achieve. When I see 3D composition like yours, it inspires me to run the same course, because I discovered I love building. In the real world this is expensive, in the virtual world it is free, only limited to the imagination.

The virtual world has become a useful tool for us to enable us to build, at no cost, getting the project on the way, but now I am building again, but in a virtual world. The problem in a virtual world is does the concept (dream) fly?

This is where the real world comes in. Money, the route of all problems or solutions depending on which end of the stick your on.

Sorry for dumping on you like this. I know this is supposed to be about tips and trick. Some of you have mentioned this, taking an image, like 3 view picture and introduce it into CAD then trace the picture then scale it to the desired size and begin the process of turning it into a 3D model. Not new to me, but as I mentioned I have decided to begin to assemble my project in to CAD and last night I built this model of the WeMoTec Mini Fan 480 using a Jpeg file. It is about 99% correct.


The model was created with AutoCAD 2007. My computer is not the optimum system for solid modeling. This is something that was not mentioned much in the earlier thread. It plays a great part in the enjoyment of building the models.
What is the requirement for any of the software in the earlier threads? Usually graphic card and memory play a big part in this.

I hope I ding ramble on too much? BetterFly ~v~ latter….


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RE: Tips And Tricks for CAD Programs. - 12/16/2006 2:14 AM   
kevin pelletier



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quote:

ORIGINAL: RCBuilder42yrs

Mike,

Have you heard of a program called "Rhino3D". Was talking to Olaf Weidner from Germany and this is the program he used to design the "Raven" all the way up to a 70% of Scale model! The big one has full scale type motor mount. Wood model with Formers which he designed in the program.

I still haven't seen in this thread a way to "Import" 3 views or even a Picture of the full scale so you can Trace the outlines?

Can somebody share how this is done, in any of the CAD programs or do you simply X and Y all the points along the line until you have a drawing.. YUK!

At this point I'm looking for Short cuts, as Mike indicated earlier in the thread, for most Stick models, its quicker to draw an outline on "Butcher" paper, lay the longerons in there to form the Box and cut the formers to fit. But I would like to learn how do do the same thing in Some CAD program. This Rhino3D sounds like its the Kind of TEA I like to drink.

"Like Sand on the beach, so is the Balsa dust in my shop!"

RCBuilder42yrs




i realize this is an old post but i figured it was woth explaining
first open microsoft paint then in paint click file then open the find the picture and open it in paint then crop the image then go to edit in paint then click cut then open auto cad then goto edit in auto cad and click paste then trace the drawing when done tracing goto edit in cad and click clear ( not all clear just clear) that will erease the back ground and leave the trace lines.
hope this helps


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