// - Move the Z probe (or nozzle) to a defined XY point before Z Homing when homing all axes (G28). Try using Z offset to adjust where your 3D printer starts printing. #define HOMING_FEEDRATE_Z (8*60) #define EEPROM_SETTINGS. Want to print on top of an existing object? 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). You will need to make sure software endstops are DISABLED for Z after adding the probe. Having trouble getting your prints to stick? To write the firmware yourself or using Repetier firmware, you need the old settings. Homing is required before G29, M48, and some other procedures.. Sounds simple, but what if are by accident near the top. Der BLTouch ist an einem Petsfang links montiert, trifft also bei klassischem Homing nie das Bett. G28 – Perform Homing Routine. If homing is needed the LCD will blink the X Y Z indicators. 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). 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. The home position on a CNC machine is a static, repeatable position. // // With this feature enabled: // // - Allow Z homing only after X and Y homing AND stepper drivers still enabled. #define Z_SAFE_HOMING. January 2017 you can set homing to raise z before homing. Reason is simply to cause no collisions. In the case of the Ender 3, the chip used sadly disqualified Repetier firmware, so writing it yourself is the only option. There's no way to do it, without extra hardware - either physical or electronic. FYI on a I3 the Y end stop at the back is a min end stop not a max. Keep a count of how many 1mm steps, and stop when you get the nozzle about 1 to 2mm away from the platform. Going Home. including homing.. Ie homing Z should not move X or Y ... Maybe a video? To get these, connect the printer via USB, connect it with a software like Repetier host and send M503 to … Notes. Add 2 // in front of the MIN_SOFTWARE_ENDSTOP_Z line in your Configuration.h file as shown below. G28 disables bed leveling. Hier relevant vermutlich: Ender 3 mit MKS Gen L, TMC2208, BLTouch v3, Marlin 1.1.9. You can also specify which exact axes you want to home by adding an X, Y, or Z to the command. Make a note of the total of 1mm steps made for the home offset value. If you have a z max end stop as well, that would catch the up move simply by triggering and you are safe. Follow with M420 S to turn leveling on, or use RESTORE_LEVELING_AFTER_G28 to automatically keep leveling on after G28. 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