Cool! Got a link?
How do I make a Star Trek replicator?
- Thread starter Janger
- Start date
Cool! Got a link?
No, I tried to find it but gave up. I think it's buried in one of his Utilathe rebuild threads.
I supposedly have the ability to do that with my CNC router and its touch probe.
Brent H
Ultra Member
@Susquatch - in the full “AutoCad” you do this: take picture, convert to a PDF, import it into AutoCad. After that scale the picture to the correct measurements. It is just a matter of tracing the photo and then checking measurements to confirm fitment.
It works great for converting drawings or, as @YYCHM mentions, drawing parts to scale from a good quality pic. There is some distortion with camera pics but it is easy enough to extrapolate and correct measurement/perspective errors.
It works great for converting drawings or, as @YYCHM mentions, drawing parts to scale from a good quality pic. There is some distortion with camera pics but it is easy enough to extrapolate and correct measurement/perspective errors.
Matt-Aburg
Ultra Member
For that clip holder, I would scan then only use it as reference geometry. It looks like one holder could be pattern copied. This probably would not warrant the cost of a scanner to do in this case. On more complicated objects, you could scan, clean up, and print. The scanners range in price from a couple hundred to 100,000$. Of course, you get what you pay for.. If you want a good starter scanner, I would recommend either a Peel or Einscan scanner. These are not metrology grade, or certified scanners. They would do the job though. You will still need to clean up and redraw the part if it is prismatic. For organic, you can auto-surface it. For 3D printing you can leave it as polygon mesh. Here is in my opinion of a starter scanners.. I would avoid Creality lizard or anything that costs 2-300$.. you really get what you pay for.
Shining 3D Einstar 3D Scanner
EINSTAR, an affordable handheld 3D scanner, makes high-quality 3D data available to everyone. In the standard package you will find a handheld 3D scanner with Exstar software, and a lightweight carrying case which includes a series of accessories: a silicone case, introductory user guide...
or made in Canada by Creaform, for the consumer market
Portable 3D scanner and scanning solutions | peel 3d
peel 3d is a series of professional-grade handheld 3D scanners and scanning solutions.
peel-3d.com
Matt-Aburg
Ultra Member
Avoid the lizard... you might as well burn your money..
the-gadgeteer.com
Creality CR-Scan Lizard 3D scanner review - The Gadgeteer
REVIEW - As I've gotten more into 3D printing and designing items to 3D print, I've found that I have a need for scanning existing objects. Creality offered
the-gadgeteer.com
Matt-Aburg
Ultra Member
4 Best Cheap 3D Scanners 2024 (That Work Well) - 3DSourced
The best cheap 3D scanner is the Revopoint POP 3.
www.3dsourced.com
Looks like revopoint is best for under 1K scanner..
Matt-Aburg
Ultra Member
but if you want the best.. Creaform wins.. this one is 60-90K
Matt-Aburg
Ultra Member
So you had your head scanned for a crown? Your wife must be very understanding.
Ya, I guess I stepped on my own dic* on that one.
Seriously. They scanned my head and then did a 3D print of my head on a post. Reminded me of a Greek sculpture. Trouble is that the sculpture looked better than I did! Prolly cuz it had no fur......
Matt-Aburg
Ultra Member
not sure which way to go on this diversion.. either they were trying get you to shave,,,,,,, or amazing the tech was available that long ago, had to be re-invented after someone got around the military patent..
Lots of stuff has been around for a long time. Just way beyond the financial means of an average guy.
I think my head was printed on a 3D printer using ABS filament. That was around 20 years ago. The printer was several hundred thousand dollars. Now you can buy one for several hundred. Roughly a thousandth of the cost back then. I do not recall any military patents on this technology. I seem to recall most of this 3D printing stuff was an outcome of the work done at one of the Fraunhoffer Institutes in Germany. But I'm not certain that's where it started. I did go to Germany around the turn if the century to evaluate early 3D printing of metal. It wasn't ready for application yet. I don't know if it ever evolved or not.
However, I did regularly review Military technology for industrial applications.
Former Member
Guest
For those who may be interested. Reliable 'scanning' relies on a method called computed tomography. The math behind this has been known for 200+ years, but the technology only became practical in the 1970's for medical imaging. My doctors were very excited to show me a 3D rendering of my tumor from their multi-million dollar toys. X-ray based CT is by far the most common, but visible light is increasingly common. It is necessarily less precise because of the increased wavelengths involved, but also much easier and safer because you don't need a magnetron to generate x-rays, x-ray detectors or risk x-raying someone by mistake
In any event, several pictures are taken from different angles / perspectives, and then combined to deduce the x, y, z coordinates of edges / vertices from inverse matrix operations. The biggest challenges are when the exact position of the camera isn't known (or isn't very accurate), or when the lighting is inadequate or directional (shadows). I'm skipping many details obviously
To think about why a single 'point and click' solution won't work, think about the example of a UFO. From the point of view of a single person on the ground, there is a point of light in the sky that appears to 'hover'. But the source of the light could easily be traveling towards or away at hundreds of miles per hour. Then when the point of light suddenly veers to the left of right, it does not exhibit 'instant acceleration' - just a turn where the speed it already has is now in a direction that is apparent to that one person.
Anyways, once the outline of an object is in something like Autocad, it can be sent to a 3D printer - additive manufacturing device. Plasmas arc designs work well with many metals, but can be _very_ expensive too. I think that there is a lot of work yet to be done in this area
Matt-Aburg
Ultra Member
You are referring to structured light, with feature recognition. As in the video of Einstar, it loosed tracking often. Laser is way better because it uses markers that define space related to the camera. I doesn't need spray to lighten dark surfaces and can work in practically any lighting condition. Unfortunately, the cost of a start laser scanner is over 10 K.
Ambient light has a lot of restrictions. Emitted 'light' as in lasers in the visible band, x-rays etc. are clearly better. 'shadows' happen for those sources too - where the object has a complex shape and rays are blocked or can't reflect to the detectors. All of this is expensive i think
I’ve been looking at the Creality scan ferret 3d but reviews are mixed and the minimum size seems to be 50x50x50mm
Spool3d link
Spool3d link
Matt-Aburg
Ultra Member
5 myths of 3D scanning