If homing is needed the LCD will blink the X Y Z indicators. Reason is simply to cause no collisions. including homing.. Ie homing Z should not move X or Y ... Maybe a video? Notes. #define Z_SAFE_HOMING. FYI on a I3 the Y end stop at the back is a min end stop not a max. There's no way to do it, without extra hardware - either physical or electronic. For true homing to work, the machine needs to have a set of switches on each axis that can be triggered by an object that does not move (such as an end plate or side plate of the frame). Want to print on top of an existing object? Keep a count of how many 1mm steps, and stop when you get the nozzle about 1 to 2mm away from the platform. You will need to make sure software endstops are DISABLED for Z after adding the probe. Add 2 // in front of the MIN_SOFTWARE_ENDSTOP_Z line in your Configuration.h file as shown below. This is also a useful way to quickly move one axis out of the way, which may be useful at the end of a print so that you can remove your part. Der BLTouch ist an einem Petsfang links montiert, trifft also bei klassischem Homing nie das Bett. Arguments: If no arguments are provided, the machine will home all 3 axes. Sounds simple, but what if are by accident near the top. // - Move the Z probe (or nozzle) to a defined XY point before Z Homing when homing all axes (G28). The home position on a CNC machine is a static, repeatable position. Try using Z offset to adjust where your 3D printer starts printing. Make a note of the total of 1mm steps made for the home offset value. This will let you adjust the Z to a negative number for your offset. One (crude method) is to have a mechanical end stop - and your program simply hammers the motor against the endstop more times than it will ever need to - the Commodore C64 disk drive did this, hammered the head against the endstop 256 times (for a maximum 40 or 80 track disk). The Z axis moves up for positive moves and down for negative moves. January 2017 you can set homing to raise z before homing. To write the firmware yourself or using Repetier firmware, you need the old settings. In the case of the Ender 3, the chip used sadly disqualified Repetier firmware, so writing it yourself is the only option. Hier relevant vermutlich: Ender 3 mit MKS Gen L, TMC2208, BLTouch v3, Marlin 1.1.9. Follow with M420 S to turn leveling on, or use RESTORE_LEVELING_AFTER_G28 to automatically keep leveling on after G28. You can also specify which exact axes you want to home by adding an X, Y, or Z to the command. With the Z axis at zero position, as in Step 3. c, use the Z axis manual jog control to bring the hot end nozzle closer to the build platform in 1mm steps. G28 – Perform Homing Routine. If you have no z max end stop just make sure never to move that much up. #define HOMING_FEEDRATE_Z (8*60) #define EEPROM_SETTINGS. Going Home. // - If stepper drivers time out, it will need X and Y homing again before Z homing. Having trouble getting your prints to stick? // // With this feature enabled: // // - Allow Z homing only after X and Y homing AND stepper drivers still enabled. G28 disables bed leveling. To get these, connect the printer via USB, connect it with a software like Repetier host and send M503 to … Homing is required before G29, M48, and some other procedures.. If you have a z max end stop as well, that would catch the up move simply by triggering and you are safe. The Z axis moves up for positive moves and down for negative moves also specify exact... 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