Defining a dedicated probe-pin implied there is a z-min-endstop and to use that for homing. It is common for X and Y axis to home the hot end to the Zero location and Z axis end stop home to the maximum positive location. Homing feed rate. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Prior to changing these settings I was getting repeat lack of homing on Z and home failures with a request to reset. Once I clicked an endstop I should have kept it closed since the homing expects to keep the switch in a triggered state once it does the step back to the homing position. My Z axis the only axis that has a stallguard capable stepper driver, so I need to find a way to disable sensorless homing on X and Y. I am trying to get sensorless probing to work, so I can't cut the DIAG1 pin and just use a mechanical endstop. I have Ender 3 with SKR Mini E3 v1.2 board, which has separate connectors for Z-endstop switch and BLTouch probe. Assuming they are sending the same signal, to the board, the end switch would represent a lower bound for the probe. Disabling Z endpoint would just result in the bed crashing/grinding against my nozzle after my BLT measured and indicated a STOP signal in time, until reset/power off. Also many capacitive or IR probes will view the part you are printing as a trigger. PROBE_USES_Z_MIN_ENDSTOP implied there is no z-min-endstop - use the probe for homing z to min. A probe can be used as a z-min-home-switch, not as a z-min-security-endstop. By clicking “Sign up for GitHub”, you agree to our terms of service and When this was invented about no board had dedicated pins for a probe. As far as I can see there is only 1 actionable item here. Add 2 // in front of the MIN_SOFTWARE_ENDSTOP_Z line in your Configuration.h file as shown below. if Z_MIN_PROBE_PIN is configured with additional probe functionality, then there are the two following use cases for the Z_STOP_PIN. ENDSTOPS_ALWAYS_ON_DEFAULT reacts on endstops, not probes by purpose. I expect the new stronger motor TMC2209 driver signals increase the coupling noise, or maybe the skr switch sensors are more sensitive to noise. It is also hard to decide if this is a [BUG] or [FR] for Marlin, however it is certainly [BUG] for me. Speaker is also disabled as the beeps annoy me :D I've an skr mini v1.1 so same mcu. +1 for this logical behaviour. Thanks to #7470, #define ENDSTOPS_ALWAYS_ON_DEFAULT is always uncommented (enabled). @ruggb your X/Y min could be outside of the bed and defaulting to (0,0) might be not relevant if you haven't set X/Y_MIN_POS properly, and Marlin can't guess that. Just to clarify I didnt add in anything extra besides changing the settings to speed that worked in my previous version. All 4 files are also in the attached Base config (Z-endstop only, no BLTouch, homing at X=0, Y=0).zip file, the configuration in them matches the config in Option 1. This is the moving speed of the axis when homing in [mm/min]. Until I found this issue! I had to get a new board and with the original k8200 board didn't have this problem, New comments cannot be posted and votes cannot be cast. #define Z_SAFE_HOMING. We’ll occasionally send you account related emails. I'm new to bltouch and found this thread while planning to put in my probe. Uncomment Z_SAFE_HOMING. When the z axis homes , it touches the endstop and moves up and homes again , but when moving down to home the second time , it moves extremely slowly , it takes 1 minute to hit the endstop again. It would be a dirty hack though. #define NUM_AXIS 4. It's certainly no physical hardship to have both probe and endstop installed - I suspect many users have the endstop from the factory and add a probe later - so this would provide a safety feature which becomes more applicable as more boards introduce a dedicated Z Probe pin, and takes advantage of hardware that many Marlin users will already have.

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