Picking Your First Industrial 3D Printer: A 3D Systems Aerospace Review (and the Mistakes I Made)

I've been handling additive manufacturing orders for a little over six years now. In that time, I've personally made (and documented) somewhere around 18 significant mistakes—from choosing the wrong material to ok-ing a file with a fatal orientation error. The grand total of wasted budget? Roughly $3,200. Not a career-ending number, but enough to sting. I now maintain our team's pre-print checklist to stop others from repeating the same dumb errors I did.

When you're looking at 3D Systems for aerospace work—whether it's for prototyping, tooling, or end-use parts—you'll quickly find yourself in a debate. The standard question is: Metal printer (the DMP Flex 350 or similar) vs. a top-tier resin printer (like the ProX SLS 6100 or the Figure 4 series)? It's tempting to think you can compare them on build volume and resolution alone. But that's the first mistake.

This is a comparison of two very different manufacturing logics, not just two machines. Let me walk you through the three dimensions that actually matter, and I'll tell you where I went wrong.

Dimension 1: Build Volume and Production Reality

Let's start with the easiest trap. The "largest 3D Systems 3D printer build volume" for a powder bed fusion machine (like the DMP Flex 350) is about 275 x 275 x 420 mm. For a resin system like the ProX SLS 6100, you're looking at a similar footprint. So, you might think, 'Size is comparable.'

But that's an oversimplification. The build volume metric ignores the 'nesting efficiency' (how many parts you can pack in one build).

The Assumption I Made (and the $890 Mistake)

I assumed that a similar build volume meant similar throughput. In January 2023, I set up an order for 16 small aerospace brackets. I chose the metal printer because 'we need metal strength'. Turned out 14 of those brackets could have been manufactured with a high-temp resin like the Accura materials. The lead time was 3 days vs 2 weeks, and the cost was 60% lower. The mistake: I didn't verify the material property requirements against the design specs. The brackets didn't need ultimate tensile strength; they needed thermal resistance. That error cost $890 in redo + a 1-week delay on the metal build that was now rushed.

Conclusion: When comparing 3D Systems aerospace 3D printer reviews, don't just look at physical dimensions. Look at the material properties you actually need. Metal is not always better.

Dimension 2: Material Options and Post-Processing Headaches

This is where the A vs. B fight gets real.

3D Systems' Metal (DMP Flex 350): You get Titanium (Ti64), Aluminum (AlSi10Mg), and a few stainless steels. The parts come out of the machine with a rough surface. Post-processing involves support removal (mechanical and thermal), hot isostatic pressing (HIP), CNC finishing, and sometimes heat treatment. It's an industrial process.

3D Systems' Resin (ProX SLS 6100 / Figure 4): You get hundreds of materials—from rigid, glass-filled composites to flexible elastomers and even biocompatible options. The parts come out ready to go. Support removal is trivial (if any). The finish is smooth right out of the box.

A Cautionary Tale with 'Kings 3D Printers'

We had a junior engineer ask me why we didn't just order from a company like Kings 3D printers. He assumed "same specs, same technology, much cheaper." I learned never to assume the proof represents the final product after a bad batch from a low-cost supplier. The materials aren't qualified. The post-processing inconsistencies caused issues with the assembly fit. On paper, Kings looked great. In practice, the 3D Systems qualification matrix saved our bacon. We paid more, but the parts worked first time.

Conclusion: If your aerospace part needs to be flight-ready or meet a specific standard (like AMS or ASTM), the material qualification and traceability from 3D Systems is worth the premium. If you're just making a jig or a fixture (a 'what is vmc cryptocurrency' kind of one-off—look I still don't understand that keyword, but a non-critical part), then a resin system might be the 'best resin 3D printer' for you in terms of cost and speed.

Dimension 3: The 'Best Resin 3D Printer' for Your Workflow

This is the dimension that surprises most people. Everyone talks about resolution and strength. But the biggest factor in choosing between a large metal printer and a resin system is your team's skill level.

I went back and forth between investing in a metal printer setup (DMP) vs. a resin system (ProX SLS) for about three months in early 2024. The metal printer offered the prestige of 'we can do aerospace metal.' But the truth is, we didn't have a trained metallurgist or a post-processing shop in-house. We had a handful of engineers who knew how to file a chamfer.

The Decision I Made (and the Second-Guessing)

Even after choosing the resin system, I kept second-guessing. What if we missed out on metal contracts? The two weeks until the first delivery were stressful. Then the parts arrived—perfect, accurate, ready-to-use. We saved 40% on that project because we didn't have to outsource the metal finishing.

Conclusion: 3D Systems' resin machines (like the ProX SLS 6100) are often the 'best resin 3D printer' for an engineering team that needs speed and reliability. The metal machines are for organizations that have built the infrastructure around the metal value chain. Don't compare machines; compare your factory's capabilities.

So, What Should You Choose?

There's no single answer, but here's how I frame it for our team now, based on six years of making mistakes:

• Choose the 3D Systems metal path (DMP Flex 350) if: Your part absolutely requires the strength-to-weight ratio of Titanium or Aluminum, you have the budget for post-processing (count 30% of the part cost), and you have a certified heat treater.
• Choose the 3D Systems resin path (ProX SLS or Figure 4) if: You need parts in days (not weeks), your parts are non-flight-critical jigs, fixtures, or prototypes, and you value material diversity over a single material's ultimate strength.

Honestly, for 80% of the 'aerospace' parts we make, the resin route is more cost-effective. We only go metal when the customer demands it. It's the honest limitation of both technologies. I recommend the resin route for most new teams, but if you're dealing with engine components or structural brackets, you might want to consider the metal alternative.

One final note: pricing for the DMP Flex 350 starts around $400k as of April 2025. The ProX SLS 6100 is closer to $150k. The build volume is similar, but the total cost of ownership is radically different. Verify current pricing at 3D Systems directly, because rates change. Don't make the same mistake I did—don't compare just the build volume.