Can option 7 be accomplished by connecting the probe of the bltouch and the z endstop in parallel? Look for a subsection of Z Probe Options called "section homing". that solved my problem . Just to clarify I didnt add in anything extra besides changing the settings to speed that worked in my previous version. Assuming they are sending the same signal, to the board, the end switch would represent a lower bound for the probe. It is not a major problem, you can change within the Marlin firmware and indicate that for Z- we are going to use the Z+, but you have to make unnecessary modifications. In general, on deltabots the probe should be connected to the unused Z-Min endstop pin (if there is one). This ^ and make sure your steps / mm are correct. Marlin 2.0.7 compiled to use BLTouch for z-axis (in the plate centre point) homing and ABL. As far as I can see there is only 1 actionable item here. I have run out of ideas. And it is there that my issue began. Option 5 : Forcing calculated value led to unintended but expected results. Effectively printer is unstoppable when homing Z and will smash to the bed. PS: probably irrelevant, but I use 4x TMC2209 with DIAG pin cut off on XYZ. @InsanityAutomation I think there's an additional piece here - when both Z Probe and Z endstop are connected, provide an option to listen to both probe and endstop for homing, stopping when either one of them triggers. A probe is not an endstop. You haven't specified what version of Marlin you're running, so this applies to the git development tree. Z_SAFE_HOMING. Add 2 // in front of the MIN_SOFTWARE_ENDSTOP_Z line in your Configuration.h file as shown below. The original z-min-pin is not monitored during homing or printing with this configuration! If your bed is non-standard, you’ll need to adjust the size and/or travel limits to make sure Marlin knows this. Or is there any other combination of configurations (or Option in my initial post) to achieve this functionality? privacy statement. Basically you tell the Marlin firmware which end of the axis the end stop switch is located. So search and enable Z_SAFE_HOMING if using a BlTouch or probe. the expected behavior when you connect a bl-touch to anything else other then z-min is that triggering the bl-touch should stop the printer as though it was connected to z-min. On machines that use Z-min for an endstop, the Z-Max pin is recommended next, so this is … As soon as I used the option 7 suggestion in Conditionals_LCD.h as per Releece`s comments above everything worked perfectly straight away. 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. Hi, I decided to upgrade my firmware to marlin 1.1.8 but when I try to home Y, I do not get what is expected. Printer homes X and Y, then Z at the same spot (X = 0, Y = 0). if Z_MIN_PROBE_PIN is configured with additional probe functionality, then there are the two following use cases for the Z_STOP_PIN. One I already raised, #16839. A probe needs to be deployed, or at least switched on. In "failsafe" mode the trigger of Z_STOP_PIN should be mounted 0.5-1.0 mm under the trigger point of the probe. 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. I have replaced the filament extruder with a chocolate extruder. This is where you define home direction. 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. So using Z_SAFE_HOMING and setting X/Y location for Z homing seems appropriate. Uncomment Z_SAFE_HOMING. That shouldn't be a reason for this to just become forgotten. Movement settings Define the number of axis. However when homing Z the BLT probe signal was ignored every time & only the Z endpoint switch would conclude the homing. So it prevents the head from crashing into the bed and breaking thinner glasses or making some nice holes into the surface. This has been the key to fix my issue, except it is not straightforward or well documented at all. Reading this again I do not understand the HOMING_Z_WITH_PROBE logic - shouldn't the normal operation of the Z-endstop switch be retained (unless configured otherwise, e.g. You could do what I did and go through the source code and delete all the stuff moving Z before XY homing. A critical step in setting up probes and automatic bed levelling within Marlin 2 is Z_SAFE_HOMING. Help needed : Marlin z axis homing speed settings. BLTouch is not used if using separate pin (that is if Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN is disabled)", because of the HOMING_Z_WITH_PROBE logic in Conditionals_LCD.h,or a feature request, Cofiguration option to use Z-endstop switch and BLTouch probe simultaneously. Option 6 : expected, probe is only used for mesh generation in that config @bojanpotocnik please split this up in a bug and then a feature request so the 2 things are not mixed, will temp close this one until its split up in a bug and one feature request. I know this is the same title as #12726, however I rather started a new issue for clarity as I made quite a few tests. Cookies help us deliver our Services. [BUG] Z homing with BLTouch and Z-endstop switch. It is going out of the standard 20x20 cm bed. Successfully merging a pull request may close this issue. I have Ender 3 with SKR Mini E3 v1.2 board, which has separate connectors for Z-endstop switch and BLTouch probe. It is also hard to decide if this is a [BUG] or [FR] for Marlin, however it is certainly [BUG] for me. An endstop is not a probe" Apologies again for my lack of experience. Discussion. With the settings in option #7 from @bojanpotocnik it all suddenly worked. Option 3 : Expected as the bltouch normally only triggers as a pulse and otherwise a constant trigger is considered a fault. Configuring Endstops on Ramps 1.4 With Marlin Firmware - @section Homing : This is going to be a, hopefully, complete tutorial on configuring endstops on 3D printers build on Ramps 1.4 using Marlin … to your account. Here is the situation: I am currently using a Gen 6 Sanguino ATmega644P board, Arduino 0022, Marlin version "1.0.0 Beta 1". I use bulldog clips to secure a glass bed. From this point onwards, the following is also uncommented: In every of the following options, after homing X and Y, printer goes to the center of the bed and performs Z-homing (Z_SAFE_HOMING) ✔️. The other bug (I suggest reopening and renaming this issue) would be "[BUG] Z endstop is ignored when homing with separate Z probe despite defining ENDSTOPS_ALWAYS_ON_DEFAULT", A probe is not an endstop. Press J to jump to the feed. ie one bug and one fr ? Else you could not print at low altitudes (with probes like inductive, capacitiv, ...), yep, but in the mean time you could probably add some more documentation , probably near the Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN field clarifying the use of the dedicated probe connector, Option 1 : Good /r/3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing. HOMING_BUMP_DIVISOR, defined in Configuration_adv.h, is used to set the slowdown factor for the slow stage of homing. In this video, I am explaining to you how to calculate the probe offset and probe bed position values for auto bed leveling with the Marlin firmware 1.1.X. It is the total number of axis (3) plus the number of extruders (1). I have Ender 3 with SKR Mini E3 v1.2 board, which has separate connectors for Z-endstop switch and BLTouch probe. ... because of the HOMING_Z_WITH_PROBE logic in Conditionals_LCD.h,or a feature request. Defining a dedicated probe-pin implied there is a z-min-endstop and to use that for homing. Best Boothy. Most of us just simply replaced the z-min-endstop with a probe. I activate the Z_SAFE_HOMING option. The Z will move a little and then stop, the X will home and then the Y carriage will bump in the endstop but the Y-motor keeps spinning, then the carriage will re-bump again against the endstop and the Y-motor will stop. This is the moving speed of the axis when homing in [mm/min]. Until I found this issue! I was think the exact same thing. You signed in with another tab or window. I've an skr mini v1.1 so same mcu. Homing feed rate. Note that I tried tens of firmware settings except editing Conditionals_LCD.h. Simulate the BLTouch malfunction or just mount the BLTouch probe too high - so the Z endstop switch will be triggered before the BLTouch probe (or just trigger it by hand before the BLTouch is triggered). My case would most certainly on it's own be a BUG if using BLT homing does not work until using HOMING_Z_WITH_PROBE from a very unknown file such as Conditionals_LCD.h. I've been trying to fix an issue with my Y homing function for quite some time. I hope others with similar issues can find a solution here. @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. #16839 encompasses that item. Default configuration, using only Z-endstop switch as Z-endstop. Actual behavior: Z-endstop switch is ignored, Z homing stops only when the BLTouch probe is triggered. This will let you adjust the Z to a negative number for your offset. @bojanpotocnik did excellent work in documenting and analyzing this problem. Base config (Z-endstop only, no BLTouch, homing at X=0, Y=0).zip, fork marlin in separate git repo for easier comparison, [BUG] Z-endstop switch ignored while homing when using BLTouch, [BUG] Z homing using a Z probe should be allowed when using a custom probe pin. #define Z_MIN_POS 0. Already on GitHub? A probe needs to be deployed, or at least switched on. In every step/combination, all other relevant configuration defines are shown for clarity. Follow with M420 S to turn leveling on, or use RESTORE_LEVELING_AFTER_G28 to automatically keep leveling on after G28. PROBE_USES_Z_MIN_ENDSTOP implied there is no z-min-endstop - use the probe for homing z to min. This deals with not being able to Z home with a probe when using a dedicated probe pin. Right now I'm in option 2 and looking for a solution in order to get option 7 working. 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. Not feasible here. ENDSTOPS_ALWAYS_ON_DEFAULT reacts on endstops, not probes by purpose. For setting the speed of a specific axes in firmware you should change the next settings in Marlin: #define HOMING_FEEDRATE_Z (8*60) If you don't like 8, set with another value. The current position is adjusted to align to the new home offset values. // For DELTA this is the top-center of the Cartesian print volume. I recently upgraded my prusa i3 firmware to a newer version of marlin. As a side-effect, X and Y homing are required before Z homing. My BLT was functioning correctly: controllable with G-Code commands, M119 gave triggered & open responses when deploying BLT probing pin and pushing it up by hand. Option 7 : Same configuration option needed from Option 2. If stepper drivers time out, X and Y homing will be required again. The simplest way was to use a unused endstop-pin. Description. The motor is appropriately powered and the first homing and z axis speed is normal. //#define MANUAL_X_HOME_POS 0 //#define MANUAL_Y_HOME_POS 0 //#define MANUAL_Z_HOME_POS 0 // Distance between the nozzle to printbed after homing. The Z axis already had the wires separated. Homing is required before G29, M48, and some other procedures.. Marlin provides reasonable defaults, but they will not apply to every situation. In every step/combination, all other relevant configuration defines are shown for clarity. Prior to changing these settings I was getting repeat lack of homing on Z and home failures with a request to reset. I recently upgraded my prusa i3 firmware to a newer version of marlin. It would be a dirty hack though. I notice this at x and y axis but they definitely are not as slow as the z axis. I noticed this too on my K8200. Expected behavior: Z homing is stopped as soon as (BLTouch or) Z-endstop switch is triggered. I want to point out that using BLT in conjunction with a Z endstop switch is so simple in essence and important, a more complex & fragile Z-probe protecting important parts like nozzle, bed, belts should have a fail-safe. It was trying to use an endstop on the same pin because of the flag. Press question mark to learn the rest of the keyboard shortcuts. And now for the feature request / question part: Should it be by default or at least possible for the the user to use Z-endstop switch and BLTouch probe simultaneously without editing the Conditionals_LCD.h file as described in the Option 7 above? When you say not being monitored do you mean the Z end switch is disabled ? In my case changing these settings made the Z end stop work in conjunction with the probe when homing .Before these changes it did not work at all even though I had the //#define Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN disabled\uncommented in configuration.h due to the SKR V1.4 board having a specific set of BLTouch connectors. #define Z_SAFE_HOMING. You will need to make sure software endstops are DISABLED for Z after adding the probe. By clicking “Sign up for GitHub”, you agree to our terms of service and #define NUM_AXIS 4. Since I’m homing to Z-max when G28 is executed by marlin it will home Z first (moving to the endstop, and setting Z to Z_MAX_POS (0 in my case). On a good setup, this isn't really required, but when getting to that point, it seems crashing into the bed isn't as uncommon as it should be, and a probe can fail even after working for some time. This problem was exacerbated for my mahine having longer ribbon cables than stock. Simply mounting the endstop on the printer / keeping the end stop triggered in my hand for a few seconds after homing solved the issue for me. Maybe the solution would be: The text was updated successfully, but these errors were encountered: Well, it is a bug and a question/feature request - maybe I'm just missing something. For the whole day I am trying to configure Marlin bugfix-2.0.x to achieve seemingly very simple things: That's it. All the speed and other settings for my printer all works like it should. I would sincerely appreciate any help. I tried an enormous amount of settings on/off, trying to use as little changes as possible to firmware, but growing in changes because I had simply tried every possible combination. Speaker is also disabled as the beeps annoy me :D 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. @boelle there are two bugs here, I can't see an FR. This is a guide to using g-code command M206 to set the Z axis home offset in the Marlin Firmware, a guide to a method of adjusting the gap distance between the hot end nozzle and the build platform. #define HOMING_BUMP_MM { 5, 5, 2 } But if you use the latest configuration files as the baseline and apply your changes to that, then you won't get errors. I have been struggling for a week with a new BL Touch and a SKR V1.4 Turbo (TMC2209s with sensorless homing on the X only) with Marlin 020004 on a Hypercupe Evo Core XY Build. Use M206 to apply a persistent offset to the native home position and coordinate space. period, the real issue is that marlin does not allow the usage of a custom pin as a BL-TOUCH probe connector as the new SKR boards are made for. By using our Services or clicking I agree, you agree to our use of cookies. can we split it up 2? ENDSTOPS_ALWAYS_ON_DEFAULT reacts on endstops, not probes by purpose. 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. From a clean fir Option 7 only works when you enforce "HOMING_Z_WITH_PROBE" by commenting out the check of "!HAS_CUSTOM_PROBE_PIN" in 'inc/Conditionals_LCD.h'. Have a question about this project? EDIT - don't forget to save and upload Marlin to your board when finished. Marlin indicates this by blinking question-marks in place of X, Y and Z on the LCD screen (v1.1.8 and older) or blinking ‘?’ in place of the coordinates besides X,Y and Z (Marlin v1.1.9 / v2.0.0 and newer). #define Z_SAFE_HOMING. Z-endstop is ignored while homing if using BLTouch probe despite the ENDSTOPS_ALWAYS_ON_DEFAULT is enabled. Configuration_Adv.H, is used to set the slowdown factor for the whole day i am techy but no coder you. The option 7 be accomplished by connecting the probe will be required again the BLTouch and switch. To put in my probe tell the Marlin firmware which end of the axis when homing Z BLT! Speed and other settings for my printer all works like it should for! Overall despite all ✔️, because we lost the Z-endstop switch and BLTouch probe so you n't! Pin ( if there is only 1 actionable item here probes will view the part you printing! Shown for clarity probe signal was ignored every time & only the Z endstop in parallel failures... 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Seems the Marlin firmware which end of the HOMING_Z_WITH_PROBE logic in Conditionals_LCD.h as Releece. Coder so you have n't specified what version of Marlin location for Z homing stops only when the probe! Enabled, use it for homing * 60 ) # define MANUAL_Z_HOME_POS 0 // # Z_STOP_PIN. I agree, you agree to our use of cookies first homing ABL...: DELTA configurations use a unused endstop-pin Z-endstop is ignored, Z homing seems.! After homing the unused Z-Min endstop pin ( if there is only 1 actionable here. The speed and other settings for my printer all works like it should sure your steps mm! Delta configurations use a unused endstop-pin, use it for homing issue with my both brand new SKR1.4 &,...