Set the max feedrate for one or more axes (in current units-per-second). Homing feed rate. View the current setting with M503. Can someone explain to me the line in marlin "#define HOMING_FEEDRATE_Z (20*60)" as it relates to changing the Z homing speed? Without a doubt a particularly critical step in setting up probes and automatic bed levelling within Marlin 2 is Z_SAFE_HOMING. This is the moving speed of the axis when homing in [mm/min]. And with MULTIPLE_PROBING 2 the Z probing also is the same speed from first to second probe. The DEFAULT_MAX_FEEDRATE (Maximum speed) of the individual axis and extruder motor are shown below. G28 disables bed leveling. Set the max feedrate for one or more axes (in current units-per-second). Uncomment Z_SAFE_HOMING. If EEPROM_SETTINGS is enabled, these are saved with M500, loaded with … #define HOMING_FEEDRATE_Z (8*60) #define EEPROM_SETTINGS. Changes to the original Marlin 2.0.7.1 files for SKR Mini E3 v2.0, Ender 3. Wait for Homing XYZ to complete. To do this, it sets the feedrate at 1.732 times the nominal homing feedrate with no comment. 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. Homing is required before G29, M48, and some other procedures.. #define Z_SAFE_HOMING. The Ender-3 will become a very popular printer, if not already, and many users will upgrade the Marlin firmware as I did. 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. The feedrate … [Marlin] M203 - Set Max Feedrate Update: 2020/09/18. The G28 command is implemented in Marlin.cpp starting at line 996. I just checked the current version of 1.1.9 (18.11.2018). #define HOMING_FEEDRATE {50*60, 50*60, 4*60} Axis steps per unit. If homing is needed the LCD will blink the X Y Z indicators. (What is that about - i.e., why the hard-coded weird number 1.732?) It still has (50*60) in the config. Description. There is conditional code for Deltas there, since it needs to home up all three axes at once. Changing to HOMING_FEEDRATE_XY (20*60) made homing safe for use. You will need to make sure software endstops are DISABLED for Z after adding the probe. To know this wo #define HOMING_FEEDRATE_Z (4*60) the Z probing at the G28 do always 2 probes, even if the MULTIPLE_PROBING is commented out. This will let you adjust the Z to a negative number for your offset. When Click to Begin appears, press the controller button to move to the first point. Notes. 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 stepper motor receives step by step moving command from the controller. Notes. Oftentimes in Marlin, speed or acceleration are expressed in [mm/s] or [mm/s2] but the feed is expressed in [mm/min]. Follow with M420 S to turn leveling on, or use RESTORE_LEVELING_AFTER_G28 to automatically keep leveling on after G28. 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). This prevents your Z homing from occuring without prior X and Y homing. Without this, you may accidentally miss the bed when homing Z. Is that about - i.e., why the hard-coded weird number 1.732 )! Adding the probe this, you may accidentally miss the bed when homing Z and Y.... 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