At the heart of every construction project around the world, there’s a handful of vehicles doing all the heavy lifting. Whether it be a digger, a tractor or a crane, this machinery needs to be safe, efficient and fit for purpose. The latter can depend quite a lot on the project at hand.
It’s often possible to change tools mounted to the end of their robotic arms, making industrial equipment fairly adaptable. But in certain cases, where necessitated by obstacles, ground clearance or environmental hazards, more extensive modifications are required.
That’s where 4C Creative CAD CAM Consultants comes in. Over the last 6-7 years, the Artec Ambassador has offered its services to an excavator in the Netherlands. 4C’s latest modification project saw it called out to digitize a 10-meter vehicle featuring a cabin with complex internals, an air filtration system and a boom mounted to a rotating platform with Caterpillar tracks.
Artec Leo with an on-screen 3D scan of the vehicle’s Caterpillar tracks.Artec 3D & 4C
Traditionally, getting hold of CAD data for such a large, complex structure would require slow, methodical manual modeling. Introducing 3D scanning into the equation allowed 4C to capture the equipment in its current state for measurement later on. Better yet, pairing Artec Leo and Artec Ray II meant not having to compromise scale or accuracy, allowing for the best of both worlds.
Leo & Ray II: A match made in heaven
With a built-in display, battery and processor, Leo is usually more than capable of capturing large objects by itself. In this case, Ray II was brought in to supplement the device’s versatile scanning capabilities with long-range data capture. Mounted high above the rest of the vehicle, its robotic arm was especially difficult to reach with Leo, but it was no problem for Ray II.
Another challenge was capturing underneath. Weighing several tons, the equipment sat just 80 cm above ground level, making it unsafe to scan from below. Removing Ray II’s tripod and positioning it on the floor proved the perfect solution. This allowed the vehicle’s underbelly to be quickly, easily captured from all angles without any unnecessary risks.
Artec Ray II alongside the customer’s hydraulic arm.Artec 3D & 4C
To meet customer requirements, 4C’s were also asked to capture the machine’s staircase. This is where Leo & Ray II really shone, as company co-owner Rogier Rappard explains.
"They wanted to extend the vehicle’s stairs,” Rappard said. "The challenge here was capturing the geometry of the stairs and the handrails. You could easily lose tracking. Using Leo, it also would’ve meant aligning a lot of scans. Instead, we captured with Ray II from the side. Then we used Leo to focus on scanning the most important parts with high resolution and accuracy.”
Merging different datasets in one click
In 3D scanning, the power is often in the software. This is especially true of Artec Studio, which boasts a completely unique feature: Smart Fusion. Not only does it combine point clouds from long and short range 3D scans, it uses the highest resolution data available for peak results.
Those wanting to take full control over data processing can also align scans themselves. 4C aligned its scans based on geometric features and merged them using the software’s Sharp Fusion algorithm. Compared to other target-based workflows, Rappard says this is "much more efficient and less time-consuming,” while still delivering an outstanding level of precision.
Scan decimation came in very handy with this project. Capturing the entire vehicle with structured-light 3D scanning would’ve resulted in a huge file with around 50 GB of information. Decimating the final model to remove unneeded polygons reduced this figure to just 300 MB, making it much easier to send to third-party software for modification.
Artec Studio’s ability to share fully formed meshes also lends itself to intuitive filesharing. Zooming in on point clouds can cause distortion, making them tricky to measure. But Ray II point clouds can be sent directly as OBJs and STLs that are textured, polished, and ready to go – and with these meshes, it’s easy to use CAD primitives for perpendicular measurement.
According to Rappard, Artec Studio’s built-in tools unlock a range of other applications as well, including feature extraction for design referencing. In this particular project, collected data turned out to be critical to strength analysis, carried out via simulations designed to ensure modification durability.
Technology that helps users
From forensics to the defense industry, 4C continues to find new applications for Leo & Ray II, a unique proposition in 3D scanning.
A 3D model of Caterpillar tracks captured with Artec Leo in Artec Studio.Artec 3D & 4C
Having the versatility to digitize large items in any environment also has real-world benefits. In another project, 4C was charged with capturing factory machinery. Without 3D scanning, it would’ve had to cease production for 2-3 days, so surfaces could be measured. Leo reduced overall downtime to just two hours – and adding Ray II makes this approach easy to scale.
Often, Leo & Ray II are deployable on their own. In the case of this vehicle, Leo could digitize the whole structure in high resolution. Ray II also captures large objects with ease. But together, they made it possible to generate a lightweight 3D model with accuracy where it matters.
