Quote Originally Posted by DrLuigi View Post
Wouldnt a X pattern for probbing points be better, To make the printer see the diffrence in the glass.
Then what we have now in a Square.
I don't know about that. However, the way the least squares fit of the data points works, it doesn't care about the pattern probed. It would not be very hard to probe in an X pattern if there was a good way to measure the results. I believe the correction matrix could be used to determine that.

That raises another idea. Rather than having a generic pattern to handle everybody's needs, would it make more sense to allow the user to omit areas from the probing and least squares fit? If I know I have a small high spot, would it make sense to level the bed with some number of points but not include the 'bad' spot in the calculations? That very possibly is worth playing around with.