How can central scanning help my business?
For example, we work with a lot of foundries who would be making parts. When they would then go into other machines, they may not be usable because they haven’t got enough material. So, by providing the scanning equipment, they can scan the part and compare it to a nominal model to make sure there is enough ‘stock’ material to machine off to clean up the part. This saves them a lot of money further downstream. We try to see what customers need and offer them help to improve their workflow.
Can 3D scanners be rented?
What about training?
A reasonable understanding of 3D and general PC usage is very beneficial but often more importantly, the willingness to learn new technologies.
How much do 3d scanners cost?
However, a 3D scanner needs to be ‘fit for purpose’ and therefore if a few £100 scanner ‘does the job’, there is no reason to spend 10’s of £10,000’s of pounds. Conversely, there is no point in spending a few £100 and expecting high accuracy, resolution (detail capture) and repeatability. Generally speaking, if you are making a detailed or medium-high value product, you will need a scanner in the similar price bracket perhaps from £20,000 – £50,000 to match the requirement. If the frequency of use is very low for the medium-high value product and scanning requirement, scanner rental may be an option for you.
What industries or type of companies does central scanning work with?
It is quite a diverse application in regards to what these scans can tackle. We can scan anything from coin sized objects all the way up to planes and buildings. Companies that want to remake products, inspect them, remake castings etc – we support all of those companies, basically called enablers, to manufacture their product.. At Central Scanning, we’ve got a very diverse portfolio of scanners and a range of client needs and requirements. We can do anything and everything within reason.
How does a technical application engineer and demonstration benefit companies?
What is ‘resolution’?
If you use say a 12 megapixel camera with a 1 metre measuring volume, the resolution will be considerably lower than using a 12 megapixel camera with a 100mm measuring volume. This is because the ‘point to point’ resolution is much lower and consequently, the data is sharper.
‘Point to point’ resolution is defined by a grid of points that is created by the camera when an image is taken – this is controlled by the optics within the scanner.
Is it best to scan everything at a high resolution?
What happens if I scan at too low a resolution?
What is post processing of scan data?
Note of caution: You do have to be careful as there are some software programmes on the market that will make a point cloud look very nice and smooth which is impressive visually but at the sacrifice generally of accuracy.
What is photogrammetry?
The scaling information (scale bars) are normally factory calibrated to certify the accuracy. The can usually be re-certified on an annual basis or to fit in with your internal quality system requirements.
Photogrammetry: Do I need it?
The other form of photogrammetry used a high resolution SLR type camera to take a series of images of an object. This data is then put through specialist software which uses clever algorithms to align the images. This process can be great for creative items where the look of the item and colour capture is more important than the accuracy.
What Can be Scanned?
Is 3D scanning industry specific?
How small an item can a 3D scanner scan?
If scanning an aeroplane for example, you can get away with much larger point spacing on the majority of the plane. If looking for detailed close up details, again high resolution would be needed. Generally speaking, the higher the resolution, the more expensive the scanner. If you have for example a 12 MegaPixel scanner and fit 500mm lenses, you will be measuring 12 points over a 500mm volume. If you then install a 50mm measuring volume, still on the 12 MegaPixel camera, you will have a much more dense and therefore detailed point cloud – much higher resolution. What you don’t want to be doing is scanning everything at a very high resolution if not required as file sizes would be very large, thus taking a long time to post process after scanning.
It is always worth asking a potential supplier to demonstrate some items and to recommend the scanner resolution combined with the lenses required to meet the requirement.
How large an item can a 3D scanner scan?
Can I scan in colour?
When it comes to 3d scanning, what is the worst kind of material to have?
What size and type of objects can you scan?
- Castings are often scanned for dimensional verification or reverse engineering (creating data from a physical object).
- Vehicles are scanned for the design and manufacture of body styling kits where companies need to understand the shape of the car ‘as is’ to be able to create the new parts.
- Electronic equipment is scanned to add new parts to the device or retrofit.
- Body panels for re-manufacture.
- Humans are scanned for medical reasons and to create maquettes.
- Film props to bring into CGI.
- Virtual and Augmented reality.
- Clay models of items to bring them into a 3D world for tooling or scaling up and down perhaps for 3D printing.
How accurate are 3d scanners?
Why are some 3d scanners more accurate than others?
Is a handheld scanner as accurate as a static camera system?
That said, some of the more recent hand-held scanners on the market use markers and calibration artefacts to overcome some of these issues.
Which is more accurate - fixed or hand-held?
What is the difference between accuracy, repeatability and resolution?
Repeatability is the measure of the systems/process ability to repeat the measurement several times. In a lot of industries, this would involve 30 parts being measured by 3 different people with the part being removed and re-positioned in a fixture/holding device 30 times. This is then input into a spreadsheet which calculates repeatability. Good levels of repeatability is important as you generally need to be confident that the scanner you are buying will measure the same dimension time and time again within the specified tolerances.
Reference Markets & Markers
Some scanners use markers and some don’t - why?
A lot of scanner software uses very complex algorithms that analyse the scan data. It can very accurately position patches by free matching the data during scanning. This has the advantage of not requiring the time of adding/removing markers/cost of markers. But, the trade off can be accuracy if scanning for very high accuracy applications.
Do we need to always spray items white for scanning?
Historically, these scanning sprays needed to be removed and it was very difficult to do so from certain surfaces. Such as, car interiors, stitching and textured surfaces. In the last couple of years, scanning sprays that disappear after scanning have been introduced.
These allow the scan data to be vastly improved. In addition, there is no need for cleaning as they completely evaporate after use. Consequently, this makes the scanning process much cleaner which has benefits for the equipment and the environment around the equipment. In some cases (AESUB), they do not contain Titanium Oxide which has health benefits for the technician as well.
If a surface is matt or a light colour, in most instances, scanning spray is not required.
What are the reference markers on the object being scanned & what are the benefits?
Why do some scanners need markers/dots?
If a scanner does not use markers/dots, it normally uses surface/feature-based alignment to align the data. The features can be 3D or in some cases, graphics on the item or a combination of both. This can be very accurate but is dependent on the structure of the item.