Hi everyone,
I’m Florian, 36, and by day, I’m a Metrology Engineer in the automotive industry. My daily life usually involves high-end ZEISS equipment, microns that actually matter, and enough documentation to sink a cargo ship.
Naturally, because my brain apparently doesn’t know how to “clock out,” I decided to bring my work home with me—sort of. Yesterday, in a fit of questionable financial judgment (some call it “fun”), I bought a MetroX.
The Goal
I’m looking to feed my home lab, which currently consists of a Bambu Lab P1S and a Ratrig vCore 3.1. The plan is to use the scanner for Reverse Engineering and some Quality Assurance on my prints.
The Skepticism (aka: The “YouTube Problem”)
Here’s my issue: I’ve spent way too much time watching influencers scan plastic dinosaurs and decorative busts. While that’s cute and all, most of those “reviews” feel like glorified commercials.
As someone who deals with traceable standards and Gauge R&R (MSA) for a living, I’m struggling. I have yet to see a “reviewer” actually scan a traceable artifact or perform a proper measurement system analysis. A shiny 3D model of a T-Rex looks great on a thumbnail, but it tells me absolutely nothing about whether the data is actually usable for engineering.
The Big Question
So, I’m here to find out: What can these “budget” scanners actually do? Are they legitimate entry-level tools for someone who knows what a tolerance is, or am I just playing with a very expensive laser pointer? I’m looking forward to diving into the data, running some real tests, and seeing if this thing belongs in a workshop or a toy box.
Happy to be here and looking forward to some nerdy exchanges!
Cheers, Florian
Do a little more searching. There was a member that was doing a ball bar test comparing different scanners.
I think it comes down to what you are trying to do with the scanner. Some are just trying to digitize things for vr. Some people are RE and need a point cloud to bring into cad. Having the shape to build around or measure from is helpful and you don’t need micron precision for that.
Revopoint is getting more into the Metrology with the MetroY Ultra. But these are not $20K scanners, so expecting the same results, you will be disappointed. You get 80% of the way there with these scanners though at a much lower pricepoint. Again, it comes down to what you really need. All the Revopoint laser scanners perform well for their intended purpose. There are many on here using the scanners for RE work. You don’t see videos from them because they are too busy actually working 
I used my MetroX to scan a bent axle that I had. Scan/Cad data and physical measurements matched up and I was able to determine how bent and in what direction it was bent. I was also able to see that my bearing surfaces inside the diff were not parallel via my scan. I dont think I would have caught that without the scanner because it was 2 degrees. Not discernible by eye, but definitely would shorten bearing life if I hadn’t seen it.
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You’ve hit the nail on the head. For my workflow—primarily RE and QA of FDM parts. I’m looking for a reliable “Optical Caliper.”
Here is my perspective on the technical requirements:
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The 10(5):1 Rule: FDM tolerances usually sit between 0.1 and 0.25 mm. To have a valid measurement process, the tool should ideally be 5 to 10 times more precise. If the MetroX consistently hits the 0.03mm range, we are looking at a ratio of ~1:4 to 1:8, which is a perfectly acceptable “Uncertainty Budget” for functional 3D printing. For most cases it is overshooting 
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Software Stability (The Dealbreaker): As an engineer, I don’t need bells and whistles; I need stability. The scanner must function as a professional tool. If the software is buggy or crashes during a mesh fusion, the accuracy becomes irrelevant. I’m looking for a “set it and forget it” workflow where the software reliably handles the math so I can focus on the CAD.
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Reproducibility over Speed: In a private “Maker” or prototyping environment, throughput is secondary. I care about repeatability. If I scan a reference gauge three times, I need the deviation between those point clouds to be negligible.
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GD&T Utility: A caliper can’t easily measure flatness or complex warpage. Using a scanner to verify Form and Orientation (like your 2° axle deviation) is exactly where these mid-range metrology tools shine.
The Bottom Line: If the hardware/software ecosystem provides a stable, repeatable “optical caliper” experience without the “alpha-tester” headache, it’s the right tool for the job. Idon’t need to measure jet turbines; I just need a stable baseline for functional engineering.
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Should have spent a little more money on the MetroY Ultra CMM version as I think that would have you most comfortable with the tools you are used to using.
I’ve had a MetroX (kickstarter) and now the MetroY Pro. The 'X was fair and I got some decent scans with a lot of work. The 'Y is a lot better, but still could be better as it struggles with shadowy spots and sometimes misses portions entirely. I scan a lot of shiny or black items (some have both) and you can’t switch between modes…yet. I very rarely get to use the ‘normal’ setting.
I just got the 'Y a few months ago and am already trying to figure out how to sell it and get the Ultra. But maybe I’ll skip to whatever is next. IDK.
The software is what makes it and it is leaps and bounds better than it was when the 'X came out. Revopoint is steadily releasing new software that makes a difference.
If I were in your shoes, I’d see if I could return the 'X and get the 'Y Ultra CMM.
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