Increasingly, we are using handheld 3D scanners to scan legacy equipment and create retrofit parts.
Handheld 3D scanners can capture highly detailed and precise measurements of existing equipment, including complex geometries and fine details. The accurate data capture ensures that the retrofit parts will be a near exact match.
Once you have the 3D scan data, you can quickly create 3D models and prototypes of the retrofit parts using CAD software and 3D printers. This rapid prototyping allows for rapid iteration and testing.
Below are some of our tips when using a 3D scanner:
Only scan the areas you need. Scanning other unnecessary areas may look good but adds to the data file size (sometimes a lot).
If scanning all sides of an object, try to position it so the scanner can move around the whole shape OR put the shape on a turntable to get as much of it in one scan file as possible.
If laser scanning with reference markers (reflective dot stickers), place them on removable/reusable reference parts (like rulers). This makes marker placement and removal from the object unnecessary. It also makes set up next time much faster.
f you have to put markers on the object, let part of the marker dot hang off an edge so it is easier to remove after scanning.
Spend more time on the critical interfaces that help build good CAD geometry in post.
What does your post processing software accept (stl, obj, other). Plan for this, as you may need to run the data through a point cloud data editor first.
Position your computer display (laptop) in plain sight during scanning to get direct scan data feedback during operation. I typically watch the screen while scanning since it shows the data cloud growing in the new areas of measurement. The angle of approach is critical, so watch for undercuts and make sure you capture them where needed. Many times, they are not fully visible so you may need to create them in post.
If your part or assembly is REALLY shiny, consider a mat finishing spray to create a dull, even finish for scanning. There are scanning sprays that last for a short time and evaporate in 4 hours—no cleanup needed. Chalk sprays can work too but are more difficult to clean up.
Scanning setup can take a while. Make sure your saved scans are complete and usable before closing out the software you are using.
Scanners often come with contrast settings. Some are for shiny surfaces. Some are for black surfaces. Cycle through all of them to get the best scan if you have a multi-surface object (like a machine).
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