What is additive manufacturing in simple terms?

Additive manufacturing is making a part by adding material one layer at a time until the shape is done. A machine reads a 3D file and stacks the layers. People also call it 3D printing. It is the opposite of cutting a part from a solid block.

Is additive manufacturing the same as 3D printing?

Yes, additive manufacturing and 3D printing mean the same thing. Both describe building a part layer by layer from a digital file. Additive manufacturing is the more formal term. 3D printing is the everyday name for it.

What is FDM and why do you use it?

FDM is a 3D printing method that melts plastic and lays it down in lines to build a part. FDM stands for fused deposition modeling. We use it because it is fast to start, low in cost, and a great fit for custom plastic parts and small batches.

How are my parts made and shipped?

Your parts are printed with our FDM process and shipped through our fulfillment partner, Slant 3D. You send a design or pick one from our shop, we print it from plastic filament, then it ships to you. Parts are made in the USA.

Guide

Additive manufacturing: a plain guide to building parts layer by layer

Additive manufacturing is a way to build a part by adding material one thin layer at a time until the shape is done. It works from a digital 3D file. A machine reads the file, then lays down material in stacked layers. This is the opposite of cutting a part out of a solid block. People also call it 3D printing. The term covers many methods, and FDM is the most common one for plastic parts.

How additive manufacturing works

Additive manufacturing builds a part from the bottom up. You start with a 3D model on a computer. Software slices that model into many flat layers. The machine then makes one layer at a time and bonds it to the layer below.

FDM is the method we use most. FDM stands for fused deposition modeling. A nozzle melts a plastic thread and lays it down in lines. Each line cools and sticks. Do this thousands of times and you get a solid part.

Other methods exist too. Some use a laser to melt metal powder. Some use light to harden liquid resin. The core idea stays the same in all of them. You add material, you do not cut it away.

Additive vs subtractive: the key difference

Subtractive manufacturing starts with a solid block and cuts material away. A CNC mill is the classic example. You remove chips until the part is left. This wastes the material you cut off.

Additive manufacturing only puts material where you need it. That means less waste on many jobs. It also lets you make shapes that are hard or slow to cut, like a part with hollow channels inside.

Neither way is best for every job. Big runs of simple metal parts often still suit older methods. Custom plastic parts and low volumes are where additive shines.

Where FDM 3D printing fits best

FDM is a strong fit for custom plastic parts and small batches. You can change the design and print a new version the same day. No mold or tooling is needed first. That keeps the cost to start a new part low.

Good uses include brackets, housings, jigs, and replacement parts. Hobby and home items work well too. Common materials are PLA, PETG, and ABS. Each one trades cost, strength, and heat resistance in its own way.

FDM is not the right pick for every part. Very fine detail, smooth clear parts, or high heat loads may call for resin or metal methods instead. We will tell you when another path makes more sense.

How we print and ship your parts

We run an FDM process and use Slant 3D as our fulfillment partner. You send us a design or pick one from our shop. We print it from plastic filament, layer by layer. Then it ships to your door.

Slant 3D runs a large print farm in the United States. That lets orders scale up without a long wait for tooling. Your part is made in the USA.

We will not promise an exact in-house print time, because run times shift with the queue and the job. What we will do is keep you posted on where your order stands.

Quick takeaways

Additive manufacturing builds a part by stacking thin layers from a 3D file.
It is the opposite of subtractive methods, which cut material away from a block.
FDM melts plastic and lays it in lines, and it is the most common method for plastic parts.
Additive shines for custom parts and small batches, since no mold or tooling is needed first.
We use an FDM process with Slant 3D as our fulfillment partner, and parts are made in the USA.

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Common questions

What is additive manufacturing in simple terms?: Additive manufacturing is making a part by adding material one layer at a time until the shape is done. A machine reads a 3D file and stacks the layers. People also call it 3D printing. It is the opposite of cutting a part from a solid block.
Is additive manufacturing the same as 3D printing?: Yes, additive manufacturing and 3D printing mean the same thing. Both describe building a part layer by layer from a digital file. Additive manufacturing is the more formal term. 3D printing is the everyday name for it.
What is FDM and why do you use it?: FDM is a 3D printing method that melts plastic and lays it down in lines to build a part. FDM stands for fused deposition modeling. We use it because it is fast to start, low in cost, and a great fit for custom plastic parts and small batches.
How are my parts made and shipped?: Your parts are printed with our FDM process and shipped through our fulfillment partner, Slant 3D. You send a design or pick one from our shop, we print it from plastic filament, then it ships to you. Parts are made in the USA.