Auto_Bed_Leveling: Enhanced G29 command

[Roxy]

Roxy,
I have some questions :

Why do I have some "+-" before some values of the topography ?

  --0.22982 +0.00091 +-0.17644
  -0.22815 --0.00807 +-0.13478
  -0.17552 +0.19074 --0.04623

I have "+", "-", "--", "+-" !!! I see in your code, you add some extra for the font used in pronterface. But what I understand, is that you double the sign, so why do I have many "+-" ?

Which set of code do you have printing the bed topology? Which #define ORIGIN_???_??? is enabled?

I looked, and my guess is you have ORIGIN_FRONT_RIGHT defined ???? If so, I think you found a bug. Let's change that code to be:

#ifdef ORIGIN_FRONT_RIGHT
    for(yy=0; yy<n_points; yy++ {
        for(xx=0; xx<n_points; xx++) { 
            SERIAL_PROTOCOLPGM(" ");
            if ( eqnBVector[ (n_points*n_points)-yy-(xx*n_points)-1 ]-mean >= 0.0)
                SERIAL_PROTOCOLPGM("+");
            else
                SERIAL_PROTOCOLPGM("-");    // we need this extra - because Proterface uses a preportional
                                // font and it causes the columns to not line up nice without it.
            SERIAL_PROTOCOL_F( eqnBVector[ (n_points*n_points)-yy-(xx*n_points)-1 ]-mean, 5);
        }
        SERIAL_PROTOCOLPGM(" \n");
    }
#endif  // ORIGIN_FRONT_RIGHT

In addition, I do not understand the values of this matrix ; here are the values :

Bed x: 78.00 y: 71.00 z: 3.21
Bed x: 101.00 y: 71.00 z: 3.67
Bed x: 124.00 y: 71.00 z: 3.62
Bed x: 78.00 y: 97.00 z: 3.44
Bed x: 101.00 y: 97.00 z: 3.43
Bed x: 124.00 y: 97.00 z: 3.63
Bed x: 78.00 y: 123.00 z: 3.27
Bed x: 101.00 y: 123.00 z: 3.31
Bed x: 124.00 y: 123.00 z: 3.40
Eqn coefficients: a: 0.01 b: -0.00 d: 3.24
Mean of sampled points: 3.442588

With Libre Office Calc, my matrix is

-0,232588	-0,002588	-0,172588
0,227412	-0,012588	-0,132588
0,177412	0,187412	-0,042588

Some values mismatch too much with the topography given by the code ... I do not know why ?

Thanks a lot

I haven't actually run the ORIGIN_FRONT_RIGHT code. (And that is why it is easy for a bug to sneak in.) I've made those changes but we need to check them out. How about you re-run it with the suggested change. And we will wrestle it to the ground with the new numbers?