AMMP's geometry stretched our team to develop critical features: the offline functionality and the benchmark function. Enough time has passed that we can openly talk about the actual use case and how we innovated the ceiling fastener layout for this project.
The goal was to speed up the fastener installation in a spherical ceiling. There were ~1300 fastening points. Traditional means and methods of fastener layout by transferring 2D layout to the ceiling resulted in extremely slow installation. A crew of four journeymen could only layout 20 to 30 points per day. The problem was access to the marked floor; the entire building had a nine-level scaffolding structure, making access to the "floor" layout impossible.
The project foreman brought several robotic total stations to lay out the X and Y coordinate points to the scaffolding, aka "the dance floor." Next, the journeyman transferred these points to the ceiling. A rotating laser at 69' was beaming the benchmark the entire time to identify the elevation. Robotic Total Stations kept on resetting themselves every time a waste cart rolled nearby, making the layout extremely slow. One foreman and one journeyman achieved around 40 points per day with a total robotic station. The project manager was aiming for over 100 points per day with two people maximum to stay on schedule.
Spectar proposed laying a 40'x40' grid and using the intersection points as alignment targets. Then the journeyman can quickly lay out 30 to 40 points in the 40'x40' with the required accuracy. The z-axis remained a challenge because we didn't know how to place a target floating 69' in the air. Neither could the robotic total station. Soon after we had an "a-ha moment." An AR laser could beam the same line to align our model on the required elevation.
At the peak of production, our journeyman user was laying out 140 points in a day alone, precisely what the project manager needed to stay on schedule.
That use case was the reason for developing our "benchmark" feature. The idea was to align on x and y, and then raise or drop the model to any elevation.
Learn more about AMMP construction by reading the MATT Construction blog.