Velo3D FAQ: What I Learned From 5 Years of Metal 3D Printing Mistakes (and How to Avoid Them)

You've got questions about Velo3D. I've made the mistakes so you don't have to.

I've been handling metal additive manufacturing orders for about 5 years now. In that time I've personally been involved in over 30 major projects, and I've made roughly $15,000 worth of pretty embarrassing mistakes. I'm the guy who now maintains our team's pre-flight checklist for any 3D printing decision. Here are the questions I wish someone had answered for me back in 2021.

Is Velo3D really a supplier to SpaceX and Anduril? Or is that just marketing hype?

Yes, it's real. I've verified this through multiple public sources (Velo3D's own filings, press releases from Anduril, and technical presentations at AM conferences). But here's the thing — being a supplier doesn't mean they print every part for them. It means they've passed the rigorous qualification process that companies like SpaceX require. In my experience, that qualification alone tells you something about the machine's reliability. I once spent 6 months trying to get a different vendor's printer qualified for a defense customer — we never made it. Velo3D's track record with those names is a signal, not a guarantee.

Can Velo3D actually print complex parts without supports? I keep hearing that claim.

Short answer: yes, within limits. The conventional wisdom in metal AM is that you always need supports for overhangs steeper than 45 degrees. Velo3D's Sapphire machines use a combination of a non-contact recoater and a specific thermal management strategy that allows printing with shallower angles — I've personally printed features down to 10 degrees without support. But here's the catch I learned the hard way: it's not magic. You still need to design for the process. I had a part in September 2022 that we printed without supports per the marketing claim, and it failed catastrophically because we didn't account for heat accumulation in the part's geometry. $3,200 worth of powder and machine time down the drain. So yes, it works, but you have to work with their application engineers before assuming every geometry is support-free.

How does Velo3D compare to traditional manufacturing like CNC milling? Should I switch completely?

No, and anyone who tells you metal 3D printing will replace CNC is either selling something or hasn't run the numbers. I've compared costs on over 200 orders in the past 3 years. Additive wins when you need: complex internal channels, weight reduction, or low-volume production with frequent design changes. CNC wins when you need: tight tolerances (like ±0.001 inch), high volume, or simple geometries. The smartest move I've seen is hybrid — print near-net shape, then finish with CNC. That's what we do now for critical aerospace components. My biggest mistake was trying to go fully additive for a 50-piece run of brackets; first article rejected because surface finish was too rough. That cost $890 + a week delay.

What about defects in metal additive manufacturing? How often do they happen?

I don't have hard data on industry-wide defect rates, but based on our 5 years of orders, my sense is about 8–12% of first builds have some issue — porosity, delamination, or distortion. The most frustrating part is that it's not always obvious until post-processing. You'd think a CT scan would catch everything, but we've still had parts pass inspection and fail in later service. The lesson I learned: build destructive testing into your process, especially for fatigue-critical components. In Q1 2024, I had three consecutive builds from the same design fail because of layer adhesion — we hadn't adjusted the laser parameters for a new powder batch. That was the third rejection, and it's when I created our pre-check list. We've caught 47 potential errors using that checklist in the past 18 months.

Can you recommend an SLA 3D printer for prototyping? (I know this is off-topic, but people ask)

Ha, I get this question a lot since I'm the '3D printing guy' in my company. For SLA, I'd look at anything from Formlabs or Phrozen depending on your budget. But here's the thing — if you're considering Velo3D for production, prototyping in SLA can be misleading. The mechanical properties don't transfer. I once prototyped a turbine blade in SLA, everything looked perfect, then the metal version failed in a completely different way. Use high-fidelity simulation instead when you're going from polymer prototype to metal production. Personally, I'd argue you don't need an SLA printer at all if you're strictly doing metal AM — just jump to simulation.

What about CO2 fiber laser machines? How do they fit?

Only tangentially related, but since it's a common search term alongside Velo3D — CO2 fiber laser cutters are for sheet metal, not for additive. I mixed them up early on. If you're looking at Velo3D, you're probably in the realm of thick-wall, high-value components, not thin sheet. Don't confuse the two. That said, I've seen companies integrate laser cutting with additive for hybrid manufacturing — you print a near-net shape, then cut features. But that's a separate investment.

One more thing: what about 'gaine semi rigide VMC'? That's a French term for semi-rigid conduit, not related to 3D printing. But if you're here from that search, you'll want something else.

I'm not sure why this showed up in our keyword list, but let me save you time: gaine semi rigide VMC is about protective cable tubing for ventilation systems. Nothing to do with Velo3D or metal 3D printing. If you're looking for suppliers of that, check industrial distributors like Rexel or Sonepar. I'll stick to what I know.

Look, I've made plenty of costly mistakes in this field. What works for me now is: verify claims with your own tests, lean on the vendor's application engineering, and always — always — have a fallback plan. If you're just starting with Velo3D, spend the first month just running test coupons and understanding your specific material behavior. It'll save you the $15,000 I burned through.