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A Guide to the CNC Process for Architectural Work

September 21, 2017

 

Since their introduction by the United States Air Force in the 1950's, CNC routers have been a useful tool in the aerospace industry. It was in the mid 1990's that we saw the potential for the equipment in the architectural world.

 

First, what is a CNC? A CNC router (Computer Numerically Controlled) is a computer numerically controlled cutting machine similar to a hand held router but much larger. Routers are primarily used for cutting various materials, such as wood, composites, plastics, solid surface (such as Corian®, Krion® or Hi-Macs®) and high density foams. Omega has 3-Axis machines - which route X, Y & Z Axis. Omega also has a 5-Axis machine that is a great tool for doing complex, curved surfaces. Our 5-Axis machine, with the addition of the B-axis and C-axis, has great 3D capabilities and has opened up an entire new realm of cool stuff that we get the privilege to produce.

 

3-Dimensional CNC (Computer Numerically Controlled) modeling is the process of routing physical objects from 2-D or 3-D digital information, commonly referred to as CAD (Computer Aided Design) files. The process of CNC routing involves two main steps – tool path generation and actual routing. 

 

How the Process Works…

 

The Concept

An idea is brought to the table in either a digital or non-digital format. Omega employs creative design and fabrication professionals that can assist in questions ranging from how to integrate the machine process into your design plans and the manufacturability of your idea. 

 

CAD (Computer-Aided Design) Drawing

If the idea has not been rendered in a digital format then this is the time for that. The CAD file can be a simple 2-dimensional drawing or a full 3-D model. Our staff is experienced in CAD drafting and can assist in this process as well.

 

CAM (Computer-Aided Manufacturing) Package

The CAM Package is the process of taking the CAD data and converting it into coordinates that the machine understands. It is also the process of adding stock, flanges, run-out, and other necessary machine information to the model. In this step, cutters are chosen and the finished machined information is created.


Create a Toolpath

Once the proper parameters are set in the CAM program, the next step is to create the toolpath program. Creating the toolpath is the actual act of converting the geometry into X,Y, and Z coordinates for 3-Axis and X, Y, Z, B and C coordinates for 5-Axis that the CNC machine can understand.


Post Process

Post processing the toolpath is the last step that is done to the program before it goes to the machine controller. The post process customizes the program to the specific machine that the toolpath will run on. Just like on a car, you have to use the correct type of gasoline to make the car run; the CNC needs to have the correct style of program language to understand it.


Machine Controller

On a CNC machine there is an attached machine controller which houses the user interface. The post processed program is entered into the machine controller. Other data is added including where the stock that is to be machined is located on the machine, the speed and feed rate that the machine is to run at, the length of the cutter, etc.


CNC Machine Part Model

Once setup correctly, the machine is told to run the program and the part will be machined to shape and size per the original CAD drawing.

 

Make Part Mold (if needed)

Often times, CNC machining is used to create thermoforming or fiberglass mold instead of cutting a part or design out directly.

 

 

Materials that Can Be Processed with a CNC Machine

 

Architectural Materials

-Corian® Solid Surface by Dupont

-Krion® Solid Surface by Porcelanosa

-Hi-Macs® Solid Surface by LG Hausys

-Staron® Solid Surface 

-Lumicor®

-Pressure Laminate

-3-Form®

-Trespa®

-Richlite™

-MDF

-Masonite

-Plywood

-Hardwoods

-Melamine

 

Modeling

-Polyurethane Foam

-Styrofoam

-Ren Shape®

-Perfect Plank®

-Hardwoods

-MDF

-Other modeling materials

 

Composites

-Epoxy Prepreg Lay-ups

-Carbon Fiber

-Kevlar®

-Raw Honeycomb

-Honeycomb panels

-Phenolic

-Polyesters/Vinylesters

 

Plastics and Other Sheet Materials

-Acrylics

-Polycarbonate

-Polypropylene

-Polyethylene

-Nylon

-PETG

-Sintra®

-Gatorfoam®

-And many more

 

 

 

A Note about Surface and Edge Finish

Depending on the application and the customer’s needs, we can create a surface that is free from machine marks or scallops. Our machining techniques are used in tandem with our fabrication department to provide a completed product with the desire surface finish. If the 3-D Model is being used as a mold, then we can post process the model after it has been machined to knock off any of the scallops, adding a priming agent such as Duratec, and sand the surface to whatever grit necessary. Also, using state of the art cutters, our edge finish can appear to be polished should the project necessitate it.

 

Benefits of CNC Fabrication: Repeat-ability and High Volume

Thanks to the use of CNC machines, it is possible to produce one or a thousand parts with perfect repeatability. Part of our design support is to help architects, designers, and engineers make educated decisions concerning models and materials. In-turn, this saves customers money as we can help specify the right product or process for your specific application. Our quality control techniques give us the ability to make high volumes of the same design or part and ensure that they are identical.

 

Markets and Industries Served

 

Some potential markets for CNC Fabrication are as follows:

 

● Themed Entertainment Industry                                            

● Signage Industry

● Architecture and Design                                

● Millwork Companies                                      

● Cast Urethane/Foam Processors

● Casino applications/décor                             

● Themed restaurant décor

● College and University                                    

● National Parks/Landmarks    

● Commercial Signage                                     

     

Currently Omega Architectural Products provides two primary CNC services for clients:   

1) 5-Axis and 3-Axis CNC Routing of Master Models and Patterns

2) 3-Axis CNC Machining, Surfacing, Routing, and Drilling of complex or routine customer production or fabricated parts and accessories from a wide variety of non-metallic materials such as solid surface.

 

Contact us to today to see how we can help with your project. 

 

 

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Omega Architectural Products, Inc.

517 6th Street South

Kirkland, WA 98033

Toll Free: (877) 988-8400

Email: info@omega-ap.com

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© 2017 Omega Architectural Products, Inc.