Aug 1, 2022. #19. I think the reason is you have both the touch and z axis home switch plugged in. This may help you. Big Tree Tech SKR Mini E3 V3.0 and 3.5" touch screen upgrade on Ender-3 Pro, fixing BLtouch issue. Watch on. . I think what you are looking starts around the 5:30 mark. Greg. Sorted by: 1. For most Cartesian printers, the homing position is at the front-left corner of the build plate. End-stop switches can be at either end of each axis (and even both), but the firmware must be configured accordingly. A common arrangement is to have end-stop switches at X-min, Y-min and Z-min positions. I was eventually able to get a mostly working config but now have an issue with auto homing on the Y axis. When I select auto home from the Marlin menu, the hot end will move to the right to home X as usual, but then when it moves towards the back to home Y it will sometimes not make it all the way to the end stop at the back right of the printer. The Z-axis endstop is stuck in a closed position. The Z-axis endstop being stuck in a closed position will cause your Ender 3 to stop any Z-axis movement before it can even start, as it will make your 3D printer think that the Z-axis is already at the lowest possible position. In this case, only downward movement should be limited (and homing Get endstop status and configure Marlin firmware @section homing using Pronterface and the newest Arduino IDE; All done. Ready for motion configuration. (z axis) goes both below and above z =0.00. I have asked before on forums as homing (-z) is meant to be a safety feature, at least logically. Now It's clear. It-s very few explanation about The most likely reason that will prompt your Ender 3 to display the homing failed error is a problem with the endstops, which are the components you can find on either side of each axis, responsible for letting the Ender 3 know the starting point of the axes. Yes, they move in the correct direction manually, just not when homing. I'm using Marlin 2.0. It's possible the axis direction is reversed (inverted) in firmware. I know the common answer to moving the wrong way is to flip the motor connector, but for homing to work all the firmware sttings need to agree on direction. fMaSe.

marlin z axis not homing