// For DELTA this is the top-center of the Cartesian print volume. My BLtouch probe won’t center in the bed. I tried changing the offsets in the firmware but no success. To increase the homing speed, increase HOMING_FEEDRATE_XY from (20*60) to (40*60) and HOMING_FEEDRATE_Z … So it will then be in the position that you want. EDIT - don't forget to save and upload Marlin to your board when finished. You can see it drop the microswitch. 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 have an Ender 3 with marlin 2.0.1. heroMe fan duct. 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. That will move your Y Axis 10 mm right after homing. Goes to same point. Because he has the zero points all FUBAR, it won't auto level correctly. I do not have a probe to calibrate the z offset but I have all 6 endstops. Step 5. 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. This prevents your Z homing from occurring without prior X and Y homing. Here is some related settings: I have just built my first 3D printer, and I am having some problems. As a side-effect, X and Y homing are required before Z homing. (Question) BLtouch not homing exactly center of bed. #define Z_SAFE_HOMING_Y_POINT (Y_MAX_LENGTH/2) // Y point for Z homing when homing all axis (G28) #endif. My problem is. Uncomment Z_SAFE_HOMING. #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). The Homing is a G28. If you then add a G92 then this position will become the home position for the print. 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). which gives me X= 95 and Y = 84, But instead, by Z axis is homing on . The values you should use need to correspond to the actual offset from the homing point to the origin of the bed (0,0). I believe WHERE Z homes is defined in the config.h file. //#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. My problem is homing the 3D printer. In that case, X zeros (albeit to MAX), and Y zeros (again forward) as normal. 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! It’s goes to the “center” but it’s just off. If stepper drivers time out, X and Y homing will be required again. Without this, you may accidentally miss the bed when homing Z. It is a Cartesian based 3D printer, using Marlin firmware and Pronterface software. 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 offset will be updated after homing the Z axis, in the next step. With auto bed leveling, the head moves (supposed to) into the center of the bed to home Z. Question. 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. And since I always like to do HOMING in the center of the bed for safety, I activate the Z_SAFE_HOMING option. So adding these two lines should fix it. I realized something else when disabling BLTOUCH. Just add a G1Y10 after that. What could help is a little bit of G-Code right after the Homing. 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