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