A Michigan Technological University researcher is predicting that personal manufacturing, like personal computing before it, is about to enter the consumer mainstream in a big way.

“For the average American consumer, 3D printing is ready for showtime,” said Associate Professor Joshua Pearce.

The reason is financial: the typical family can already save a great deal of money by making things with a 3D printer instead of buying them off the shelf.

Savings for consumers

Pearce drew that conclusion after conducting a lifecycle economic analysis on 3D printing in an average American household.

In the study, Pearce and his team chose 20 common household items listed on Thingiverse (a catalog of free designs).

Then they used Google Shopping to determine the maximum and minimum cost of buying those 20 items online, shipping charges not included.

Next, they calculated the cost of making them with 3D printers. The conclusion: it would cost the typical consumer from $312 to $1,944 to buy those 20 things compared to $18 to make them in a weekend.

Open-source 3D printers for home use have price tags ranging from about $350 to $2,000. Making the very conservative assumption a family would only make 20 items a year, Pearce’s group calculated that the printers would pay for themselves quickly, in a few months to a few years.

The group chose relatively inexpensive items for their study: cellphone accessories, a garlic press, a showerhead, a spoon holder, and the like. 3D printers can save consumers even more money on high-end items like customized orthotics and photographic equipment.

3D printing isn’t quite as simple as 2D printing a document from your home computer — yet. “But you don’t need to be an engineer or a professional technician to set up a 3D printer,” Pearce said. “Some can be set up in under half an hour, and even the RepRap can be built in a weekend by a reasonably handy do-it-yourselfer.”

It’s not just about the money. 3D printing may herald a new world that offers consumers many more choices, as everything can be customized. “With the exponential growth of free designs and expansion of 3D printing, we are creating enormous potential wealth for everyone.” explains Pearce.

Small-scale custom manufacturing

Before 3D printers become as ubiquitous as cellphones, they could form the basis of small-scale manufacturing concerns and have huge potential both here and for developing countries, where access to many products is limited.

“Say you are in the camping supply business and you don’t want to keep glow-in-the-dark tent stakes in stock,” Pearce said. “Just keep glow-in-the-dark plastic on hand, and if somebody needs those tent stakes, you can print them.”

“It would be a different kind of capitalism, where you don’t need a lot of money to create wealth for yourself or even start a business,” Pearce said.

The study is described in the article “Life-Cycle Economic Analysis of Distributed Manufacturing with Open-Source 3D Printers,” published in the journal Mechatronics (see Reference below).