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. The first G28 // Use "Z Safe Homing" to avoid homing with a Z probe outside the bed area. // - If stepper drivers time out, it will need X and Y homing again before Z homing. 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'm not sure what to tell you to do if that didn't work (other than the 12v all the time). The reason I didn't use constant 12v is because I didn't have a source to connect it to. //#define Z_SAFE_HOMING is not enabled, this is advised to enable. This is not :x: because of the reason described in Option 3 point 3.:x: Z-endstop switch is NOT monitored when moving Z … Add 2 // in front of the MIN_SOFTWARE_ENDSTOP_Z line in your Configuration.h file as shown below. // // With this feature enabled: // // - Allow Z homing only after X and Y homing AND stepper drivers still enabled. I hope Daniel considers making this the default setting for the non BL Touch firmware. I get a correct home direction with X and Y when I instruct one at a time to HOME. Enable Z_SAFE_HOMING. This means that the BLTouch, rather than the Z endstop switch, is used for determining where the minimum Z position is. // Not working O // #define XY_FREQUENCY_LIMIT 15 // Minimum planner junction speed. If I tell Z to home, both X and Y blast off away from their homes crashing to the opposite sides of their rails. Enable USE_PROBE_FOR_Z_HOMING. :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. #define Z_SAFE_HOMING. • Go to line 356 if you want to set printer name to display on printer LCD This will let you adjust the Z to a negative number for your offset. I'm slicing with Simplify3D, but I've also tried Cura for Lulzbot and had the same issue. 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. 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). 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. • Go to line 402 and set Y offset to mount offset (Recommended mounts use -10 for the Y offset.) This is important, but not the complete solution. and then recompiling the firmware. Bed Leveling Bi-linear (allows saving Bed Leveling Data ( M500 or "LCD Menu" Store settings and restore using M420 S1 in startup G-Code ) 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. // - Move the Z probe (or nozzle) to a defined XY point before Z Homing. You will need to make sure software endstops are DISABLED for Z after adding the probe. 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