#define Z_SAFE_HOMING. If I tell Z to home, both X and Y blast off away from their homes crashing to the opposite sides of their rails. This should not be much greater than zero and should only be changed // if unwanted behavior is observed on a user's machine when running at very slow speeds. #define Z_SAFE_HOMING • Uncomment line 110 - #define CUSTOM_PROBE • Go to line 401 and set X offset to mount offset (recommended mounts use -40 for the X offset.) This is important, but not the complete solution. and then recompiling the firmware. #define HOMING_FEEDRATE_Z (8*60) #define EEPROM_SETTINGS. This means that the BLTouch, rather than the Z endstop switch, is used for determining where the minimum Z position is. Enable USE_PROBE_FOR_Z_HOMING. Bed Leveling Bi-linear (allows saving Bed Leveling Data ( M500 or "LCD Menu" Store settings and restore using M420 S1 in startup G-Code ) :x: Z-endstop switch is NOT monitored while homing Z.:x: BLTouch is NOT deployed while homing Z.:heavy_check_mark: BLTouch is not monitored while homing Z. I've recently tried to print some parts on our TAZ 6 printer, and the Z homing is not working properly in the starting script. Add 2 // in front of the MIN_SOFTWARE_ENDSTOP_Z line in your Configuration.h file as shown below. I'm not sure what to tell you to do if that didn't work (other than the 12v all the time). // - If stepper drivers time out, it will need X and Y homing again before Z homing. This is not :x: because of the reason described in Option 3 point 3.:x: Z-endstop switch is NOT monitored when moving Z … Not actually blaming Marlin 1.1.6 just made me nervous and returned to 1.1.5 as it was working best of all versions, with the features I liked and used. This is a safety feature that stops the probe from trying to deploy outside of the print bed, which could crash the nozzle into the print bed. Installing MKS SGen L v1.0 in my Ender-3 homing id not working for Z. I have a MKS SGEN L with BLTouch installed. I hope Daniel considers making this the default setting for the non BL Touch firmware. // - Move the Z probe (or nozzle) to a defined XY point before Z Homing. // Not working O // #define XY_FREQUENCY_LIMIT 15 // Minimum planner junction speed. I get a correct home direction with X and Y when I instruct one at a time to HOME. I'm slicing with Simplify3D, but I've also tried Cura for Lulzbot and had the same issue. Since I like the homing, just not in the middle of the bed, I modified the configuration to my needs by re-commenting the following line in Configuration.h //#define Z_SAFE_HOMING. Also, you have not defined the auto leveling area by setting the boundaries for probing (where the probe can reach). • Go to line 356 if you want to set printer name to display on printer LCD It is not a problem that the sensor is not above the build plate during printing as long as it is above the build plate during the auto bed levelling sequence.. Homing does not necessarily need to be the (0,0) coordinate. It makes more sense to me for manual leveling. // Use "Z Safe Homing" to avoid homing with a Z probe outside the bed area. Usually, a printer homes on the endstop switches, from that coordinate an offset is defined in the firmware to move to the origin. I'm using the standard startup script, and the issue is with G28 Z. The first G28 //#define Z_SAFE_HOMING is not enabled, this is advised to enable. Enable Z_SAFE_HOMING. The reason I didn't use constant 12v is because I didn't have a source to connect it to. 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