There are many applications where we need a second pass in different height, or after adding an obstacle. The most classic example is the kitchen worktop where we want to measure first the wall and then the cabinets. In order to keep high precision and quality of the scan ending the scanning session and rescan is not advised.
But if we scan the same region twice we will not get 2 lines. When 2dscanner aims a point twice it provides the average of the 2 points measured. This is for enhanced precision.
The above task can be done only with Combo Scan.
If you want to rescan the same region and have a second line then you can tap Next Scan and choose New Scan from Same spot.
You continue your scan as usual and you have a dxf file with both measurements.
Check the following example and the image for a better understanding.
You can place the 2dscanner on a tripod, keep it vertically aligned, and take an initial reading of the wall. Then, you can carefully lower the tripod by 2–3 cm so that the laser beam targets the cupboards.
Instead of lowering the tripod, you can also place a frontier at the front edge of the cupboards and scan their edge.
The exact correlation between the 2 measurements will depend on how well aligned the tripod is. After lowering it 2-3cm the divergence will be very small anyway. If there are visible corners, it is advisable to use them for better results and avoid New Scan from same spot. The tripod might move or rotate and produce a misaligned result.
The same method applies when scanning stair steps. Positioning the 2dscanner directly on the step is not ideal, because it would need to measure very short distances, which reduces accuracy.
It is better to scan each step from a distance of about 1 meter to capture the back, left, and right sides. Then, place a frontier at the front edge of the step and scan again from the same position.