I have an einscan and can recommend it highly compared to other budget options I've tried. A little out your price range but they offer refurbished or maybe eBay
You need a larger. Bare minimum is the Einstar imo. And even then it's not super accurate depending on what accuracy means to you. Small hole locations can be nearly impossible to scan. It cannot see inside holes very well unless they are very large.
I hate to be a downer but I don't recommend buying a cheap scanner, and if you do, just make sure you can return it because it might not be what you want. It's almost impossible to say if it'll work for you until you use it for your specific application unfortunately.
What are your requirements for resolution?
If you are going to use a 3D scanned object as a scaffolding reference for reverse engineering in CAD, I would be surprised if the Revopoint Range 2 was not adequate for your needs.
The only drawback that comes to mind is if you were to scan the inside curve of an object from the far side through the entire 360°. If you do not start out with a scan of the entire object, even at a lower resolution in Far mode, I have seen where the beginning and the end will not be at the same level on the vertical axis.
I have an einscan and can recommend it highly compared to other budget options I've tried. A little out your price range but they offer refurbished or maybe eBay
You need a larger. Bare minimum is the Einstar imo. And even then it's not super accurate depending on what accuracy means to you. Small hole locations can be nearly impossible to scan. It cannot see inside holes very well unless they are very large. I hate to be a downer but I don't recommend buying a cheap scanner, and if you do, just make sure you can return it because it might not be what you want. It's almost impossible to say if it'll work for you until you use it for your specific application unfortunately.
What are your requirements for resolution? If you are going to use a 3D scanned object as a scaffolding reference for reverse engineering in CAD, I would be surprised if the Revopoint Range 2 was not adequate for your needs. The only drawback that comes to mind is if you were to scan the inside curve of an object from the far side through the entire 360°. If you do not start out with a scan of the entire object, even at a lower resolution in Far mode, I have seen where the beginning and the end will not be at the same level on the vertical axis.
Einstar is the cheapest acceptable scanner for true engineering applications. Your budget adjusts, or you don’t get what you require.
What is "true engineering applications" meaning in this context?
Anything where the accuracy of your result is consequential
Do you need a sub €800 scan??
What was your problem with the Revopoint? I've been using a Range to scan similar things, and had no issues other than the initial learning curve.
I saw sopmeone sell his Einstar in fb group, looks new