# Thread: Does size really matter?

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Originally Posted by otsaki
...but im really out of time,...
Is this a class assignment?

2. Hey, JD Mather!

No its not a class assignment, its a project i am willing to create by free will. I'll soon update you guys with my latest progress and i will tell you my final questions for the project to be done.

I'll leave here some of my questions, tho once i am done they will be more clearly.

1) Once i am done with my project i will need to reproduce it on CNC. I am not sure if anyone is familiar with CNC (Computer Numerical Control) in short, its a machine that works with X,Y,Z that can do many things, like reproducing shapes in medal, wood, etc.
Now, since i am new to AutoCad... for my CNC, i need the exactly values of my project done in AutoCad in order to "plot them" with CNC. How can i determinate them, all the infos needed for me to be able to programate in CNC to be able to plot it.

As JD Mather told me on another topic was to use LIST. And i did it, and its pretty good information out there, so that might be it, but to be 100% i'll ask again, also i used SPLINE FIT, to draw some parts of my project, and arcs. For arcs i get the radius etc information, but for SPLINE FIT, i get points:

Code:
```                  SPLINE    Layer: "0"
Space: Model space
Handle = 2f4
Length: 20.5476
Order: 4
Properties: Planar, Non-Rational, Non-Periodic
Parametric Range: Start   0.0000
End  20.5016
Number of control points: 6
Control Points: X = 231.9404 , Y = 394.0004 , Z = 0.0000
X = 232.5873 , Y = 391.0316 , Z = 0.0000
X = 233.7294 , Y = 385.7910 , Z = 0.0000
X = 236.0320 , Y = 379.1223 , Z = 0.0000
X = 238.8326 , Y = 376.5282 , Z = 0.0000
X = 239.8981 , Y = 375.5413 , Z = 0.0000
Number of fit points: 4
User Data: Fit Points
X = 231.9404 , Y = 394.0004 , Z = 0.0000
X = 234.0984 , Y = 385.0856 , Z = 0.0000
X = 236.9227 , Y = 378.6601 , Z = 0.0000```
Is this what i need?

Thank you for the help guys, great respect for everyone! Anyways looking forward to show you what i've done so you can evaluate. Cheers

3. I would use lines and arcs - no splines if possible.
If using splines I would use a CAD/CAM software like MasterCAM to create the g-code for CNC.

4. I see, hum... problem is that i used splines in some parts of my project, they were needed... or atleast was easyer for me to reproduce what i want. About MasterCam i will review it soon and see what i can do with it! Thanks again in advice.

5. Originally Posted by otsaki
About MasterCam i will review it soon .....
These programs are professional programs and deserve (require?) a professional level of preparation.
It takes months to years of training and experience to "review" them. You stated you weren't interested in learning AutoCAD, but would hire someone to do this work. I recommend that you take your own advice and contract this job out to a professional.
Either that, or make the committment to sign up for some training classes and learn the programs.

I am curious about your design intent for this project. Originally you asked someone to model commercially available sun-glasses, yet what you posted here later looked more like something I would find in a cerial box intended for children. Exactly what is your product design intent.
Knowing the full problem description might improve the help offered here. I originally stated that the sun-glasses design you were after was not an easy design and you indicated that you didn't understand why I would say it was difficult. I am glad I didn't take the time to actually model something as it now appears you are after something much different than your original problem description.

6. Its a shape, a punching shape as a final product. But now its just a damn image:p that needs to get life on the CNC :p. My point is, how much will cost me to get the G-Code ? if i send you my actual work? Or how complicated is to learn how to create the G-Code? The sunglasses are almost done i think, not much left. They are done from Arcs and Spline Fit. They look pretty good and as much as possible less points, so i keep it simple. Now G-Code for CNC left, any idea with MasterCam? i get some errors while installing it, but Gcode2000? how is it?

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Punch shape - now that makes a bit of sense - you should have included that information in your original post.
Your punch is not at all what I envisioned when you asked how to draw a specific brand of sun-glasses.

Any CAM program should be fine for this simple punch shape.
Who is going to do the actual machining for you?
Do you have CNC machine?
Assuming you don't have this machine (as you don't seem to know much about programming it) just turn the file over to the shop that is doing your part. It will take them about 5-10 minutes to create the g-code (unless you have left out other important information).

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