CNC Machining vs 3D Printing – A real debate?
The “debate” online over additive vs subtractive rapid manufacturing technologies seems to be never-ending. Comparing the two technologies is a great way to sell emerging manufacturing equipment and attract investors, but as someone who has used both extensively, I tend not to take sides or get lost in the debate. Instead, I see a place for both technologies in rapid prototyping and low-volume manufacturing.
There are multiple advantages and disadvantages with any manufacturing process. Unfortunately, there is no one size fits all technology, you have to weigh up the pros and cons of each technology in relationship to your project needs and budget. An advantage of one technology will often be the disadvantage of the other. Here are some common advantages of CNC Machining and 3D Printing.
CNC Machining:
1. Price is generally consistent with product size and volume.
2. Finished products are very strong, stronger than most manufacturing processes.
3. Surface finish is generally superior and post finishing options are plentiful.
4. A wide range of materials to choose from.
5. Relatively low-cost machinery setup and supplies.
3D printing:
1. Parts complexity is almost limitless.
2. Very easy to go from drawing to online submission to starting a print job.
3. Becoming very accessible with increased market capacity added daily.
4. Price is generally predictable across suppliers or at least a more stable formula.
5. It is a heavily invested in sector meaning it will only get better and faster.
Just about every other traditional manufacturing technology currently takes a back seat to 3D Printing when it comes to grabbing headlines. But outside the buzz 3D Technology has not taken over traditional manufacturing. The “on-demand” future that it promises is years away and may never truly arise. That said, 3D Printing is an incredible technology and is very advantageous when used correctly. I personally love it for quickly confirming a new design iteration at a reasonable cost.
CNC Machining for me still reigns supreme in the world of new product development. It helps to keep designs in check with mass production needs. The strength of parts is simply unchallenged (in my experience) for sales, marketing and end-user needs. I tend to want to use it more, even if the cost is a bit higher because in I always learn from a CNC part. Compared to 3D Printing CNC Machining (in my opinion) is a more acceptable final product for your end customer.
Whatever technology you choose, CNC, 3D, or other, choose the technology because it is right for your project and not because it trends well on Google 🙂
Gary Moran
At HLH, we make things for you. FreeQuote@HLHPrototypes.com
