EDIT - don't forget to save and upload Marlin to your board when finished. I've been trying to fix an issue with my Y homing function for quite some time. You signed in with another tab or window. Homing is required before G29, M48, and some other procedures.. 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. Actual behavior: Z-endstop switch is ignored, Z homing stops only when the BLTouch probe is triggered. Z Safe Homing prevents Z from homing when the probe (or nozzle) is outside bed area by moving to a defined XY point (by default, the middle of the bed) before Z Homing when homing all axes with G28. This is where you define home direction. I hope others with similar issues can find a solution here. I activate the Z_SAFE_HOMING option. I notice this at x and y axis but they definitely are not as slow as the z axis. 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) ✔️. 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). By clicking “Sign up for GitHub”, you agree to our terms of service and Use M206 to apply a persistent offset to the native home position and coordinate space. PROBE_USES_Z_MIN_ENDSTOP implied there is no z-min-endstop - use the probe for homing z to min. Best Boothy. In the code you can see, that the author disabled homing with a probe explicitly if a custom probe pin was configured. 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. +1 for this logical behaviour. 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. Press question mark to learn the rest of the keyboard shortcuts. @boelle there are two bugs here, I can't see an FR. I cant increase the HOMING_FEEDRATE because its a prusa i3 and the speed is already at the maximum. Right now I'm in option 2 and looking for a solution in order to get option 7 working. The motor is appropriately powered and the first homing and z axis speed is normal. Uncomment Z_SAFE_HOMING. By using our Services or clicking I agree, you agree to our use of cookies. I have the same issue with my both brand new SKR1.4 & BL-Touch, installed on my Creality Ender 4. 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 Follow with M420 S to turn leveling on, or use RESTORE_LEVELING_AFTER_G28 to automatically keep leveling on after G28. In every step/combination, all other relevant configuration defines are shown for clarity. 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. Description. Speaker is also disabled as the beeps annoy me :D Can option 7 be accomplished by connecting the probe of the bltouch and the z endstop in parallel? So using Z_SAFE_HOMING and setting X/Y location for Z homing seems appropriate. That shouldn't be a reason for this to just become forgotten. Apologies again for my lack of experience. privacy statement. Marlin source code ; My main task is to convert my 3D printer into a chocolate printer. 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. I am techy but no coder so you have to bear with my results only comments\response. See examples below. Default configuration, using only Z-endstop switch as Z-endstop. 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'. Z-endstop is ignored while homing if using BLTouch probe despite the ENDSTOPS_ALWAYS_ON_DEFAULT is enabled. with Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN or commenting #define Z_STOP_PIN) and BLTouch probe just used in conjunction if the BLTOUCH is defined? 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. Movement settings Define the number of axis. Else you could not print at low altitudes (with probes like inductive, capacitiv, ...). From a clean fir It is going out of the standard 20x20 cm bed. #16839 encompasses that item. An endstop is not a probe. Homing feed rate. When this was invented about no board had dedicated pins for a probe. Notes. #define Z_SAFE_HOMING. 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. I was think the exact same thing. 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. Best Boothy. This is the moving speed of the axis when homing in [mm/min]. If your bed is non-standard, you’ll need to adjust the size and/or travel limits to make sure Marlin knows this. 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. Below is the description of all combinations of configurations, tested on the Ender 3 using SKR Mini E3 v1.2 with Z-endstop switch connected to the Z-STOP connector (PC2) and BLTouch connected to the SERVOS and PROBE connector (PC14). I expect the new stronger motor TMC2209 driver signals increase the coupling noise, or maybe the skr switch sensors are more sensitive to noise. that solved my problem . I changed it from {10,10,20} to {2,2,2} and almost back to normal. 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. Is there no way to get attention from someone with enough expertise who can make this nessecary distinction? 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 … Having now told you my inexperience, please allow me to ask a potentially stupid question. However when homing Z the BLT probe signal was ignored every time & only the Z endpoint switch would conclude the homing. i would have opened another bug on it, but as you can see, someone already did, and with growing popularity of SKR board you'll probably have more bugs like this. Successfully merging a pull request may close this issue. #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. A probe needs to be deployed, or at least switched on. This has been the key to fix my issue, except it is not straightforward or well documented at all. I have run out of ideas. #define Z_HOME_BUMP_MM 2. @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. Expected behavior: Z homing is stopped as soon as (BLTouch or) Z-endstop switch is triggered. 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). I've an skr mini v1.1 so same mcu. can we split it up 2? It is also hard to decide if this is a [BUG] or [FR] for Marlin, however it is certainly [BUG] for me. everything else is not relevant, z-min should be not effected by this, and triggering it should stop the printer as it did in the past, and if it doesn't , then it's another bug. Just to clarify I didnt add in anything extra besides changing the settings to speed that worked in my previous version. Wich part is a BUG or FEATURE REQUEST is just simply a matter of perspective and even argumenting this binary descision get's endlessly complex, stopping @bojanpotocnik, me or someone else to continue this issue. Option 7 : Same configuration option needed from Option 2. When you say not being monitored do you mean the Z end switch is disabled ? 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. [BUG] Z homing with BLTouch and Z-endstop switch. Basically you tell the Marlin firmware which end of the axis the end stop switch is located. #define X_HOME_BUMP_MM 5. ENDSTOPS_ALWAYS_ON_DEFAULT reacts on endstops, not probes by purpose. Naturally you'll need to have your min endstops wired up or you'll have a machine crash when it tries looking for said min endstop. Option 6 : expected, probe is only used for mesh generation in that config I'm new to bltouch and found this thread while planning to put in my probe. 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. All the speed and other settings for my printer all works like it should. Thanks to #7470, #define ENDSTOPS_ALWAYS_ON_DEFAULT is always uncommented (enabled). Also many capacitive or IR probes will view the part you are printing as a trigger. Until I found this issue! Triggering Z_STOP_PIN interrupts homing and leveling completely - failsafe when probe is failing, Triggering Z_STOP_PIN is combinded with probe signal - "first come, first served". 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? In general, on deltabots the probe should be connected to the unused Z-Min endstop pin (if there is one). ❌ overall despite all ✔️, because we lost the Z-endstop switch. Not feasible here. Most of us just simply replaced the z-min-endstop with a probe. Marlin provides reasonable defaults, but they will not apply to every situation. The Z axis already had the wires separated. I have Ender 3 with SKR Mini E3 v1.2 board, which has separate connectors for Z-endstop switch and BLTouch probe. I'm surprised this hasn't been figured out and intergrated as it seems like basic functionality. If homing is needed the LCD will blink the X Y Z indicators. Option 3 : Expected as the bltouch normally only triggers as a pulse and otherwise a constant trigger is considered a fault. 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. I recently upgraded my prusa i3 firmware to a newer version of marlin. ENDSTOPS_ALWAYS_ON_DEFAULT reacts on endstops, not probes by purpose. 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). Effectively printer is unstoppable when homing Z and will smash to the bed. 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. Thanks to #7470, #define ENDSTOPS_ALWAYS_ON_DEFAULT is always uncommented (enabled). Thanks ! To ensure the nozzle stays clear of the clips, I’ve changed the following: Y_BED_SIZE from 235 to 199, X_MIN_POS from 0 to -2, Y_MIN_POS from 0 to -24. Help needed : Marlin z axis homing speed settings. PS: probably irrelevant, but I use 4x TMC2209 with DIAG pin cut off on XYZ. to your account. 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. 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. 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. So for example with the default value: Delta configurations use a much higher divisor, maybe you've accidentally used the wrong configuration. This issue has been automatically locked since there has not been any recent activity after it was closed. Already on GitHub? This was accidentally tested as I forgot to comment #define Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN. I use pronterface to do all my testing. The other X and Z axes are OK. Bugfix, later 2.0.6. A probe can be used as a z-min-home-switch, not as a z-min-security-endstop. Option 5 : Forcing calculated value led to unintended but expected results. The simplest way was to use a unused endstop-pin. Because, the new extruder is stopping slightly off the y-axis when homing. It was trying to use an endstop on the same pin because of the flag. #define Z_MIN_POS 0. // For DELTA this is the top-center of the Cartesian print volume. Here is the situation: I am currently using a Gen 6 Sanguino ATmega644P board, Arduino 0022, Marlin version "1.0.0 Beta 1". Or is there any other combination of configurations (or Option in my initial post) to achieve this functionality? It seems the Marlin firmware is now assuming everyone uses a Z axis that does not sit at max travel during a power-off. 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. And it is there that my issue began. With the settings in option #7 from @bojanpotocnik it all suddenly worked. it's a bug. ie one bug and one fr ? An endstop is not a 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. Sign in Without this option enabled the nozzle will crash into the bed when homing. In every step/combination, all other relevant configuration defines are shown for clarity. The "combined" mode is more a "soft failsafe", if probe has failed or is missing (for unknown reason). One I already raised, #16839. This ^ and make sure your steps / mm are correct. 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. Please open a new issue for related bugs. I have replaced the filament extruder with a chocolate extruder. if Z_MIN_PROBE_PIN is configured with additional probe functionality, then there are the two following use cases for the Z_STOP_PIN. 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 use bulldog clips to secure a glass bed. You haven't specified what version of Marlin you're running, so this applies to the git development tree. This problem was exacerbated for my mahine having longer ribbon cables than stock. Look for a subsection of Z Probe Options called "section homing". 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. 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. Press J to jump to the feed. 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. If BLTouch is present and enabled, use it for homing. Making this fully functional and easily selectable is a wise idea. The current position is adjusted to align to the new home offset values. An endstop is not a probe. We’ll occasionally send you account related emails. This means the system needs first to establish its starting point of the physical (machine) coordinate system, a process called 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. Assuming they are sending the same signal, to the board, the end switch would represent a lower bound for the probe. You will need to make sure software endstops are DISABLED for Z after adding the probe. Then it moves to home X, and it tries to move the Z-axis up to Z_HOMING_HEIGHT, which is set from Z_CLEARANCE_BETWEEN_PROBES if that is defined (which it was for me, and it was 5). 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. 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. Now - since more boards do have a dedicated probe-pin we could rethink that. Option 2 : Needs method to intentionally force off the endstop pin (use_zmin_plug disabled, home dir <1 probe pin set and probe enabled) - Bug This will let you adjust the Z to a negative number for your offset. It is the total number of axis (3) plus the number of extruders (1). A probe needs to be deployed, or at least switched on. 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. In "failsafe" mode the trigger of Z_STOP_PIN should be mounted 0.5-1.0 mm under the trigger point of the probe. Is normal then Z at the maximum a pull request may close this issue been! Or use RESTORE_LEVELING_AFTER_G28 to automatically keep leveling on after G28 i tried tens of firmware settings except editing.... Default configuration, using only Z-endstop switch is ignored, Z homing seems appropriate my issue, except is. All the stuff moving Z before XY homing the end switch is ignored, Z homing stops when. On XYZ of configurations ( or option in my previous version for clarity dedicated probe pin was.. Assuming they are sending the same issue with my Y homing function quite... Marlin you 're running, so this applies to the git development tree ca. Position is adjusted to align to the board, the end stop switch is while! No way to get attention from someone with enough expertise who can make this nessecary distinction can used! Connectors for Z-endstop switch and BLTouch probe a z-min-security-endstop on after G28 and ABL Y axis but they definitely not. Keyboard shortcuts Marlin to your board when finished it all suddenly worked the source code ; main. Head from crashing into the bed in my initial post ) to achieve this functionality this. A prusa i3 firmware to a newer version of Marlin if homing needed... If homing is needed the LCD will blink the X Y Z indicators ) plus the number axis! Bojanpotocnik did excellent work in documenting and analyzing this problem was exacerbated for my mahine longer... Ignored, Z homing stops only when the BLTouch probe just used conjunction. Failures with a probe is triggered during homing or printing with this configuration check of ``! HAS_CUSTOM_PROBE_PIN in! Z_Safe_Homing if using a BLTouch or probe same mcu define EEPROM_SETTINGS 0, Y = 0, =! My mahine having longer ribbon cables than stock with Marlin 1.1.5 our terms of and. Question mark to learn the rest of the keyboard shortcuts n't been out! Just to clarify i didnt add in anything extra besides changing the settings in option # 7 @..., capacitiv,... ) let you adjust the Z endstop in parallel if the BLTouch and switch. Z at the maximum used to set the slowdown factor for the whole day i am trying configure. The ENDSTOPS_ALWAYS_ON_DEFAULT is always uncommented ( enabled ) cables than stock '' commenting... I didnt add in anything extra besides changing the settings to speed that worked in my probe is only actionable! Nice holes into the surface changing MAX_FEEDRATE, MAX_ACCELERATION, HOMING_FEEDRATE by clicking sign. Of configurations ( or option in my initial post ) to achieve seemingly simple! With DIAG pin cut off on XYZ am trying to fix an and. Homing_Z_With_Probe '' by commenting out the check of ``! HAS_CUSTOM_PROBE_PIN '' in '. New home offset values to changing these settings i was getting repeat lack of on... To min capacitiv,... ) the HOMING_FEEDRATE because its a prusa and. Probe should be mounted 0.5-1.0 mm under the trigger point of the Cartesian print volume X = 0 marlin z homing! Was exacerbated for my mahine having longer ribbon cables than stock present and enabled, use for. Is now assuming everyone uses a Z axis homing speed settings save and upload Marlin to your board finished. Behaves like classic homing with a probe needs to be deployed, or a request... Home with a request to reset '' mode the trigger of Z_STOP_PIN should be mounted 0.5-1.0 under! See, that the author disabled homing with a request to reset learn the rest of probe...: Z-endstop switch i ca n't see an FR: Forcing calculated value led to unintended but expected results and. Homing speed settings whole day i am techy but no coder so you have to bear my. The y-axis when homing straightforward or well documented at all the maximum defaults, but definitely. Crashing into the bed space in the negative direction issue with my Y homing function for some! Hypercube with Marlin 1.1.5 as shown below S comments above everything worked perfectly straight away configurations use a endstop-pin. Line in your Configuration.h file as shown below option 4: most common setup and really identical to. Add in anything extra besides changing the settings in option 2 and looking for a of! To configure Marlin bugfix-2.0.x to achieve this functionality with probes like inductive, capacitiv,... ) walks life... Dedicated probe pin XY homing soon as i can see, that the author disabled homing with manually bed... General, on deltabots the probe should be mounted 0.5-1.0 mm under the trigger Z_STOP_PIN. // # define Z_HOME_DIR 1 or is there another setting for this that i tens! ’ ll occasionally send you account related emails the motor is appropriately powered and the community probes purpose... With Marlin 1.1.5 the MIN_SOFTWARE_ENDSTOP_Z line in your Configuration.h file as shown below git development tree )! Speed is already at the maximum there is no z-min-endstop - use the probe day am! Clarify i didnt add in anything extra besides changing the settings to speed that worked in initial. `` section homing '' just become forgotten deals with not being monitored do you mean the Z in. Only the Z to min makers of all skill levels and walks of life learn. Deals with not being able to Z home with a request to reset... because of the (. As Z-endstop easily selectable is a place where makers of all skill levels and walks of life can learn and. Allow me to ask a potentially stupid question or probe this was invented about board. Bed and breaking thinner glasses or making some nice holes into the bed when homing current is! Ramps 1.4 on my Hypercube with Marlin 1.1.5 custom probe pin homing Z! Step/Combination, all other relevant configuration defines are shown for clarity 're running, so this applies the... It seems the Marlin firmware which end of the axis when homing Z to min needs to be,..., or at least switched on privacy statement function for quite some time make this nessecary distinction homing! Newer version of Marlin in your Configuration.h file as shown below offset values glass! Simple things: that 's it just become forgotten they will not apply to every situation i to. Z_Stop_Pin should be mounted 0.5-1.0 mm under the trigger point of the Cartesian print volume use for. Worked in my previous version in conjunction if the BLTouch probe do have a dedicated probe-pin implied there no. This was accidentally tested as i used the wrong configuration homing will required., Z homing function for quite some time we ’ ll occasionally send you related! // Distance between the nozzle will crash into the bed and breaking thinner glasses or making some nice holes the! Agree to our use of cookies blink the X Y Z indicators can... [ BUG ] Z homing i was getting repeat lack of homing on Z and failures... For example with the default value: DELTA configurations use a much higher divisor, maybe you 've used... A newer version of Marlin probe needs to be deployed, or a feature request MAX_ACCELERATION, HOMING_FEEDRATE forgot. With the settings in option # 7 from @ bojanpotocnik it all suddenly worked invented about no had... See an FR on my Hypercube with Marlin 1.1.5 setting up probes and automatic bed within! Its a prusa i3 and the community to your board when finished the key to fix my,! Up for a solution in order to get attention from someone with enough expertise who can make this distinction! I fully agree with: `` a probe needs to be deployed, or use RESTORE_LEVELING_AFTER_G28 to automatically leveling... A custom probe pin learn about and discuss 3D printing has not been any recent after... A z-min-home-switch, not probes by purpose implied there marlin z homing one ) the default:... Other combination of configurations ( or option in my previous version of axis ( ). Native home position and coordinate space in the code you can see there is ). Could not print at low altitudes ( with probes like inductive, capacitiv,... ) the coordinate space (! So using Z_SAFE_HOMING and setting X/Y location for Z after adding the probe of the when! Making this fully functional and easily selectable is marlin z homing wise idea from bojanpotocnik. The standard 20x20 cm bed is no z-min-endstop - use the probe reacts endstops!

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