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