I now tried to find a simple test setup to illustrate the issue. I’m aware that reflective scanning spray will greatly help here, but my goal is to show that this is a useful feature request, meaning that pausing the turntable while capturing the frame would improve quality.
Here’s my test set-up. The Revoscan MINI 2 is pointing down on the large turntable with the turtle on it. RevoScan 5 settings are high quality, feature tracking, dark object mode.
To make sure I don’t accidentally measure any tracking issues, I then captured a single frame while the turntable is standing still. As expected, the result is good:
I then turned on the turntable, waited for the turtle to be in roughly the same position, and captured a single frame while the turntable continues to rotate:
The result is that the point cloud is super noisy and to me it looks smeared in the direction that the turntable was moving in.
My conclusion based on this test is that if the turntable rotates while the camera is capturing, that degrades the quality of the resulting point cloud. And that means if I can automate the process of rotate, pause, capture frame, resume, rotate, pause, capture, … then it will produce better results than if I let the turntable continuously rotate and use the continuous capture mode.
The Single shot function is to capture steady objects not in motion , so of course you will get bad results . The turntable originally never was intended to use with this function as it just arrived shortly long after release if Dual Axis Turntable , so yes we need that new function to be covered.
Use Lazy Susan, the best cheapest alternative until Dual Axis Turntable have official single step function available , or use the Android app as I mentioned before .
I use a cheap black lazy Susan, not all objects can be scanned automatic due to lack of features or complex dimensional geometry , especially if you deal with smaller objects where you need to keep excellent distance, and it performance isgreat .
I would certaily welcome the ability to synchronize a turntable start/stop and single shots. My experience is that single shots are more accurate. From signal processing and physics point of view it would seem obvious that you will get better results if the frames taken are from an immovable object. Single shots are slower to take, but might win overall as the post-processing is faster, with less to fix manually. As a bonus, you get more detils in the scan.
So, I firmly believe in single shots for now, but I am open to be proven wrong. We have now seen examples of excellent results with single shots, so I would think that what remains to be seen is the objective comparison of single-shots vs continuous mode. For example, do we have a similar scan of a lego block, but done with the continuous mode?
I’m kinda surprised this wasn’t implemented at launch. Its not a super complicated function. My addition to this would be to incorporate the tilt axis.
Set Rotation Speed
Set Stops per Rotations / # of Pictures per Rotation
Set Beginning & End Tilt angle
Set Tilt Angle Change per Full Rotation (Example: Start at 20 Degrees and Tilt -4 Degrees after each Rotation until Platform is back to 0)
(Also incorporate the turntable window as part of the main settings sidebar rather than a standalone window)
Will the feature come with Metro X? Because my Dual Axis Turntable is gathering dust in the corner because I don’t use it anymore, it used to do automatic scans but with RevoScan 5 the feature was never brought back. And now that we have the single shot mode, wouldn’t that be a brilliant addition? Then it would no longer just rot in the box.
With Johnathan app for Dual Axis turntable you can use it with single shot as well full automatic scanning
It is fir android only but best app and functionality available .
For the rest of your questions you need to wait for the full MetroX specifications .
Apart from the app, it was also listed as a feature of RevoScan at the time, but then it disappeared. And now it appears again in the new project.Basically sold the same feature twice, but whatever the case, I would really appreciate it if it came back.
It is clear that the android app was a kind of a stopgap till a definitive solution was on the table (IIRC, it was always assumed that the re-implementation of the turntable functionality was still pending) I personally use the android app for simple tasks, and my raspberrypi zero for more elaborate work, specially when single-scanning mode is involved
It is not the same and not sold feature twice … it is specific to MetroX
Of course you want back the feature that randomly capture whatever it get under the light , that is not automatic scanning , too primitive to be usable .
Over scanned bundle of points no good for nobody . It was an illusion badly executed .
I set 10° steps, 1 frame and repeat the whole thing 36 times. Then a recording should be made, the turntable rotated by 10°, etc…
Until the 36 steps are completed, this can be done very easily with the software, but unfortunately it won’t. What annoys me is that it was sold like this back then and the DATT wasn’t/isn’t cheap. But now its lying around unused.
I’m currently doing it by hand, which I think is a shame. It’s not a big deal to program it back in, no firmware needs to be changed and there are no conflicts with other functions.
No for that you don’t need the firmware to be changed , but we both asking for completely different things and that is the difference here .
You want back the preview ability to setup your scan routine, me want it to be aware of the process with exact precision and not randomly scanning stuff .
For scanning proper undercuts and keep proper sharp edges and corners you just need a little more , but that for another discussion …
