Marlin firmware fork for MakerFarm i3v w/ auto bed level & Roxy's enhancements

[tsteever]

I too will see a similar correction matrix. Are you suggesting there may be something wrong?

[Roxy]

I too see a similar correction matrix. Are you suggesting there may be something wrong?

No... Those numbers are expected. But if your printer was perfect, you would have 1.000000 going down the diagonal and 0.00000 everywhere else.

[inventabuild]

My bed is held at three points. I want Marlin to tap at those three points for autobed level. Currently my Marlin firmware is set to tap at four points, creating a rectangle of taps, namely:

// these are the positions on the bed to do the probing
#define LEFT_PROBE_BED_POSITION 15
#define RIGHT_PROBE_BED_POSITION 170
#define BACK_PROBE_BED_POSITION 180
#define FRONT_PROBE_BED_POSITION 20

How do I set Marlin to probe only three points that I define instead of four points? Also, G28 causes the hot end to home in the middle of the bed. How do I get it to home at the front left corner which is where it homed before I implemented auto bed leveling?