I have a personal project where I want to scan some very old pewter 28mm models so I can scale them up, modify them and print them for my own use. I backed the Revopoint Mini in the hopes that it would be able to accomplish this task.
I am completely new to scanning so I understand it takes a measure of skill to produce good scans. I have read though lots of threads here trying to pick up as many tips and tricks as I can but I still cannot seem to produce a satisfactory result.
I seem to have reached the limit of my current capabilities but the real question is; have a reached the limits of the Revopoint Mini’s capabilities? I could really use some help in either making more progress or coming to the conclusion that this is as good as it gets.
My main challenge is getting “resolution” and crispness in the details. In short it the model it too “blurry”.
So, What have I tried so far:
Software and Firmware
I am using the latest firmware version and the latest versions of Revo Scan / Studio on Windows. Through all the steps (fusing, meshing) I have tried to preserve the highest level of details opting rather for noise than smoothness so I do not loose any details.
I have not tried any other point cloud processing software. If someone has a recommendation for a free tool or even a reasonably priced tool, I would be happy to give it a try.
I have calibrated the mini to 0.0530 which according to threads here should be well within an acceptable range. I have tried to get better results but the calibration program tends to crash making it a bit frustrating.
I understand the principles of light absorption and reflection. To eliminate the scanned material as a factor I bought a scanning spray, AESUB blue. I have tried using a lot of spray and very little spray but although it help it is not enough. I read that PUTV claims ATTBLIME 2h provides much better precision but honestly I am not sure I at a point yet were that will bring me the rest of the way. Or maybe I am wrong. If the consensus is that it will make all the difference, I will absolutely give it a try.
I have tried everything from lots of light to no light at all (complete darkness). I am using a black felt background to eliminate interference. In general I have found that more light leads to more noise in the scan. So far I am getting the cleanest result having the model in a felt covered box with only natural sunlight coming in.
Sunlight is nice, but it is hard to control, especially far up north in the winter where there is very little of it… Could someone suggest a good lamp with an appropriate profile to be used with the Mini?
I am using the turn table that came with the Mini but following general recommendations here to minimize the number of overlapping frames, I am using an external App to control it. I have also tried just doing partial revolutions in case the turning of the model around the edge throws Revo Scan off (like seen in the image below) but that has not seemed to make a meaningful difference.
Distance to model
I have tried very close to far away. Here closer seems to be better as long as the scanner can focus on the model.
Merging multiple scans
I have not tried merging scans from multiple angles yet. My assumption is that if I cannot get a single pass clean enough, multiple passes will not necessarily make things better.
Any tips this community might have would be very appreciated.