BLTouch probing points grid off-center
Although I have BLTouch (v3.1) on my Ender 3v2 it's not working correctly: not compensating enough and z-offset is way off on right side of my bed. Now I just print without it - much better results... It's just worthless piece of equipment now... :((
But I have a feature request: Can You do something about BLTouch probing beeing off center? I mean it starts ~15mm from left side and probe point #5 is about ~50mm from right side - it seems that all 25 (5x5) probing points are off center. I've set my probe offset to original mounting bracket that I got with BLTouch from Creality (M851 X-43.00 Y-6.00). Maybe this off-center grid of probing points is the cause of my BLTouch issues?
The BLTouch can't map the entire bed - just because of the range of motion of the print head.
The left margin you mention is the safety margin to not hit any bed clips and cause damage to the nozzle or BLTouch, or have a false reading.
One of the key parts to understand is that the BLTouch can only compensate for small adjustments - usually less than 1mm - so you still have to normally level the bed before using the BLTouch.
If you haven't set your Z-Offset as yet, I would suggest this link:
Thank You for answer.
This is my bed:
Recv: Bilinear Leveling Grid: Recv: 0 1 2 3 4 Recv: 0 -0.040 -0.020 +0.010 +0.062 +0.290 Recv: 1 -0.053 -0.035 +0.037 +0.125 +0.260 Recv: 2 -0.075 -0.057 -0.037 +0.020 +0.247 Recv: 3 -0.088 -0.057 +0.023 +0.120 +0.255 Recv: 4 -0.007 +0.007 +0.007 +0.057 +0.285
It way below 1mm. Still with BLTouch DISABLED - better 1st layer. When I enable BLTouch (without touching the leveling knobs) it's much much worse. 1st layer not sticking on the right side of the bed.
Which is strange, because right side of my bed is higher - so 1st layer on that side should be more flat (squished), but it's the opposite (like too much compensation from BLTouch).
I ordered another glass bed from Creality, maybe it will improve probing.
EDIT: On the other hand - I require BLTouch to compensate such irregularities, it's its purpose.
According to probing points off-center - here's a video (click and it will play from mark when he talks about probing mesh off center).