Open campbellollie opened 3 years ago
Are you still maintaining this repo? I face the same issue as the above person.. I tried testing out various Z offsets just out of pure frustration .. M851 Z-8.9, M851 Z8 neither going very high or low rly has an effect.. the needle is always quite far up.. do we have to actually turn the screw on the bltouch? but even then.. why would the zoffset not have a big impact, surely if u ramp it up to like -10 or +10 it should be way above the bed or scratch it?
Hi everyone,
I'm trying to finally resolve an issue that has plagued me for a long time regarding BLTouch and my Anycubic i3 Mega configuration. It seems no matter what I try I'm unable to get the Z-offset correct when using my BLTouch and "AUTO_BED_LEVELING_BILINEAR".
Some background:
The problem: Whenever I print after a G29 levelling, the nozzle is always 4-5mm above the bed.
My levelling process:
The only configuration changes I make to the Marlin config are: *PID values for the hotend and heated bed
define X_PROBE_OFFSET_FROM_EXTRUDER -2 // X offset: -left +right [of the nozzle]
define Y_PROBE_OFFSET_FROM_EXTRUDER -23 // Y offset: -front +behind [the nozzle]
define Z_PROBE_OFFSET_FROM_EXTRUDER -2
Here's my start code:
G28 ;Home ;M501 ;Load bed levelling settings M420 S1 ;Use bed levelling settings G21 ;metric values G90 ;absolute positioning M82 ;set extruder to absolute mode M107 ;start with the fan off G1 Z5.0 F9000 ;move the head 5mm up for clearance G92 E0 ;zero the extruded length G1 F200 E3 ;extrude 3mm of feed stock G92 E0 ;zero the extruded length again M117; Printing... G5;
I've followed numerous guides, YouTube videos etc etc and still seem to have the same problem.