Auto bed leveling is still failing for me, horribly. Marlin 1.1.x.
The only thing I can think of: I have a Folger2020 and both the X and Y axes are inverted, ie:
#define INVERT_X_DIR true
#define INVERT_Y_DIR true
#define INVERT_Z_DIR true
Parts print out with the correct handedness.
Looking at the front of the printer, (0,0) is the front left corner. My probe is both to the right and behind the nozzle, so both X and Y offsets are positive. But...with both axes inverted, does that mean I have to invert these offsets also? In addition to that, could the entire mesh itself be swapped left to right and front to back in Marlin? Ie Marlin can't handle this?
So four possibilities:
1. Probe offsets are correct and mesh orientation is correct, my issue must be something else.
2. Probe offsets need to be inverted, but the mesh orientation is correct.
3. Probe offsets are correct, but the mesh orientation needs to be inverted in Marlin. Ie, Marlin is not capable of handling both inverted axes as well as autoleveling. Seems quite likely.
4. Both the probe offsets need to be inverted and the mesh orientation needs to be inverted in Marlin, ie, a worse version of option 3.
What a nightmare...I can't find any documentation about this whatsoever, and I can't seem to find a solution.
After G29, I always am careful to save (M500) and then after a G28, doing an enable (M420 S1)
If it helps, I drastically lowered the entire left side (ie X = 0) and raised the entire right side (ie X = 200) and then probed:
Recv: 0 1 2 3 4
Recv: 0 -2.358 -1.866 -1.467 -1.124 -0.861
Recv: 1 -1.579 -1.085 -0.702 -0.325 -0.079
Recv: 2 -0.786 -0.323 +0.076 +0.425 +0.666
Recv: 3 -0.039 +0.414 +0.767 +1.123 +1.344
Recv: 4 +0.682 +1.170 +1.552 +1.898 +2.112
95% of what I print on my printer are either something smaller than 50x50, or test cubes. I can print out to about 80x80 with no issues, but then when trying 120x120, failure. Always the same issue too, just one corner is too high. Not one side, just one corner. It's driving me insane. Over the past year, I've probably issued G29 M500 over 1,000 times on this damn thing.
