Uncomment Z_SAFE_HOMING. The G28 command is implemented in Marlin.cpp starting at line 996. This will let you adjust the Z to a negative number for your offset. Homing feedrate The homing feedrate is the speed at which the axis home, by default it's set to #define HOMING_FEEDRATE {50*60, 50*60, 5*60, 0} // set the homing speeds (mm/min) Between the {} are the axis x,y,z,extruder, where extruder never needs homing. This is the moving speed of the axis when homing in [mm/min]. Set the max feedrate for one or more axes (in current units-per-second). The stepper motor receives step by step moving command from the controller. I understand that changing the 20 number up or down changes the homing feedrate but I would like to know what 20"60 means regarding the Z feed rate in mm/m. There is conditional code for Deltas there, since it needs to home up all three axes at once. To know this wo [Marlin] M203 - Set Max Feedrate Update: 2020/09/18. If homing is needed the LCD will blink the X Y Z indicators. Changing to HOMING_FEEDRATE_XY (20*60) made homing safe for use. To increase the homing speed, increase HOMING_FEEDRATE_XY from (20*60) to (40*60) and HOMING_FEEDRATE_Z from (4*60) to (8*60). And with MULTIPLE_PROBING 2 the Z probing also is the same speed from first to second probe. Without a doubt a particularly critical step in setting up probes and automatic bed levelling within Marlin 2 is Z_SAFE_HOMING. To do this, it sets the feedrate at 1.732 times the nominal homing feedrate with no comment. You will need to make sure software endstops are DISABLED for Z after adding the probe. #define HOMING_FEEDRATE {50*60, 50*60, 4*60} Axis steps per unit. It still has (50*60) in the config. Follow with M420 S to turn leveling on, or use RESTORE_LEVELING_AFTER_G28 to automatically keep leveling on after G28. #define HOMING_FEEDRATE_Z (4*60) the Z probing at the G28 do always 2 probes, even if the MULTIPLE_PROBING is commented out. #define Z_SAFE_HOMING. I just checked the current version of 1.1.9 (18.11.2018). Homing is required before G29, M48, and some other procedures.. Homing feed rate. (What is that about - i.e., why the hard-coded weird number 1.732?) Without this, you may accidentally miss the bed when homing Z. G28 disables bed leveling. The DEFAULT_MAX_FEEDRATE (Maximum speed) of the individual axis and extruder motor are shown below. Can someone explain to me the line in marlin "#define HOMING_FEEDRATE_Z (20*60)" as it relates to changing the Z homing speed? The feedrate … Description. Compiling firmware: “homing_feedrate now uses MM_M array instead” Help Hey folks - so I’m trying to upgrade my firmware, and I’m using Vcode and auto build Marlin with Marlin 2.0.bug fix and the BTT Skr mini v 1.2 confit files. The Ender-3 will become a very popular printer, if not already, and many users will upgrade the Marlin firmware as I did. View the current setting with M503. If EEPROM_SETTINGS is enabled, these are saved with M500, loaded with … Notes. Set the max feedrate for one or more axes (in current units-per-second). Wait for Homing XYZ to complete. Notes. When Click to Begin appears, press the controller button to move to the first point. Oftentimes in Marlin, speed or acceleration are expressed in [mm/s] or [mm/s2] but the feed is expressed in [mm/min]. Changes to the original Marlin 2.0.7.1 files for SKR Mini E3 v2.0, Ender 3. #define HOMING_FEEDRATE_Z (8*60) #define EEPROM_SETTINGS. This prevents your Z homing from occuring without prior X and Y homing. 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