I just got mine up and running using this style [
www.thingiverse.com] . Its a great idea but the springy bed causes to many accuracy problems for this to work properly IMO. I plan to switch to a sevo mounted sensor style. I am using Marlin, Slic3r and Pronterface with a Ramps 1.4.
Anyway i have a couple of questions that i cant seem to track down the answers to.
1. Does Marlin simply take all the probe positions and try to figure out the best solution for a flat plane? In other words is the "grid" that it uses a flat plane grid or does the grid go up and down in a straight line depending on the probe points? If its simply a flat plane grid then i cant see any point to probing more than 3 points.
2. Is there a way to probe the bed once and store those settings into the firmware or do you have to probe the bed before every print?