If you then add a G92 then this position will become the home position for the print. (Question) BLtouch not homing exactly center of bed. With the offset now added and saved to EEPROM, -8 position becomes the new zero position, giving the Z axis a total of 88mm of travel, as the case with my 3d printer. It is a Cartesian based 3D printer, using Marlin firmware and Pronterface software. What could help is a little bit of G-Code right after the Homing. My problem is. You can see it drop the microswitch. This prevents your Z homing from occurring without prior X and Y homing. Step 5. Uncomment Z_SAFE_HOMING. The offset will be updated after homing the Z axis, in the next step. Just add a G1Y10 after that. I realized something else when disabling BLTOUCH. The values you should use need to correspond to the actual offset from the homing point to the origin of the bed (0,0). Goes to same point. Because he has the zero points all FUBAR, it won't auto level correctly. Without this, you may accidentally miss the bed when homing Z. Homing is the process where the machine finds all the limits of the 3 axis (at the endstop switches), to have a common reference point for each axis. A new home offset value has been saved to EEPROM, and confirmed. The 3 point auto leveling was working intermittently and the GRID auto level would appear to home, but would not center the probe in the bed. I believe WHERE Z homes is defined in the config.h file. It’s goes to the “center” but it’s just off. Z Safe Homing prevents Z from homing when the probe (or nozzle) is outside bed area by moving to a defined XY point (by default, the middle of the bed) before Z Homing when homing all axes with G28. I do not have a probe to calibrate the z offset but I have all 6 endstops. My problem is homing the 3D printer. As a side-effect, X and Y homing are required before Z homing. which gives me X= 95 and Y = 84, But instead, by Z axis is homing on . So it will then be in the position that you want. I have just built my first 3D printer, and I am having some problems. My BLtouch probe won’t center in the bed. The Homing is a G28. #define Z_SAFE_HOMING #if ENABLED(Z_SAFE_HOMING) #define Z_SAFE_HOMING_X_POINT ((X_BED_SIZE) / 2) // X point for Z homing when homing all axes (G28). With auto bed leveling, the head moves (supposed to) into the center of the bed to home Z. If stepper drivers time out, X and Y homing will be required again. I have an Ender 3 with marlin 2.0.1. heroMe fan duct. // For DELTA this is the top-center of the Cartesian print volume. And since I always like to do HOMING in the center of the bed for safety, I activate the Z_SAFE_HOMING option. //#define MANUAL_X_HOME_POS 0 //#define MANUAL_Y_HOME_POS 0 //#define MANUAL_Z_HOME_POS 0 // Distance between the nozzle to printbed after homing. Here is some related settings: I left Z_SAFE_HOMING enabled and instead of going at the middle of the bed, it goes at the top end right corner ({30,30} instead of {15,15}).I have the feeling the distance is multiplied by 2 for some reason. To increase the homing speed, increase HOMING_FEEDRATE_XY from (20*60) to (40*60) and HOMING_FEEDRATE_Z … When using an auto bed leveling sensor like you are using you should consider this remark: If using a Probe for Z Homing, enable Z_SAFE_HOMING also! I tried changing the offsets in the firmware but no success. EDIT - don't forget to save and upload Marlin to your board when finished. From the endstops, firmware defined values exist to give the printer head the offset to the home position, also known as origin (X=0, Y=0). In that case, X zeros (albeit to MAX), and Y zeros (again forward) as normal. That will move your Y Axis 10 mm right after homing. 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