marlin z homing

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 … It seems the Marlin firmware is now assuming everyone uses a Z axis that does not sit at max travel during a power-off. Please open a new issue for related bugs. Speaker is also disabled as the beeps annoy me :D Now - since more boards do have a dedicated probe-pin we could rethink that. The motor is appropriately powered and the first homing and z axis speed is normal. 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 tried changing MAX_FEEDRATE , MAX_ACCELERATION , HOMING_FEEDRATE . Just to be clear, when you guys say option 7 works, the end switch is still not being monitoring during homing, correct? One I already raised, #16839. ENDSTOPS_ALWAYS_ON_DEFAULT reacts on endstops, not probes by purpose. I recently upgraded my prusa i3 firmware to a newer version of marlin. The current position is adjusted to align to the new home offset values. Printer homes X and Y, then Z at the same spot (X = 0, Y = 0). I hope others with similar issues can find a solution here. I have the same issue with my both brand new SKR1.4 & BL-Touch, installed on my Creality Ender 4. In "failsafe" mode the trigger of Z_STOP_PIN should be mounted 0.5-1.0 mm under the trigger point of the probe. 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. So search and enable Z_SAFE_HOMING if using a BlTouch or probe. This deals with not being able to Z home with a probe when using a dedicated probe pin. Cookies help us deliver our Services. Assuming they are sending the same signal, to the board, the end switch would represent a lower bound for the probe. #define Z_SAFE_HOMING. [BUG] Z homing with BLTouch and Z-endstop switch. I use pronterface to do all my testing. In the code you can see, that the author disabled homing with a probe explicitly if a custom probe pin was configured. 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. #define Z_MIN_POS 0. ... because of the HOMING_Z_WITH_PROBE logic in Conditionals_LCD.h,or a feature request. A probe needs to be deployed, or at least switched on. I noticed this too on my K8200. @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. 2.0.5. I'm surprised this hasn't been figured out and intergrated as it seems like basic functionality. I expect the new stronger motor TMC2209 driver signals increase the coupling noise, or maybe the skr switch sensors are more sensitive to noise. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. 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. From a clean fir I would sincerely appreciate any help. Option 5 : Forcing calculated value led to unintended but expected results. // Sets direction of endstops when homing; 1=MAX, -1=MIN #define X_HOME_DIR -1 #define Y_HOME_DIR -1 #define Z_HOME_DIR 1. 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? #define Z_HOME_BUMP_MM 2. PROBE_USES_Z_MIN_ENDSTOP implied there is no z-min-endstop - use the probe for homing z to min. EDIT - don't forget to save and upload Marlin to your board when finished. 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. You will need to make sure software endstops are DISABLED for Z after adding the probe. Help needed : Marlin z axis homing speed settings. 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). 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. And it is there that my issue began. 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. Most of us just simply replaced the z-min-endstop with a probe. Press J to jump to the feed. 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. Note that I tried tens of firmware settings except editing Conditionals_LCD.h. Add 2 // in front of the MIN_SOFTWARE_ENDSTOP_Z line in your Configuration.h file as shown below. Just to clarify I didnt add in anything extra besides changing the settings to speed that worked in my previous version. With the settings in option #7 from @bojanpotocnik it all suddenly worked. that solved my problem . 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). So using Z_SAFE_HOMING and setting X/Y location for Z homing seems appropriate. All the speed and other settings for my printer all works like it should. /r/3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing. Best Boothy. I've an skr mini v1.1 so same mcu. #define NUM_AXIS 4. I have replaced the filament extruder with a chocolate extruder. can we split it up 2? @boelle there are two bugs here, I can't see an FR. This was accidentally tested as I forgot to comment #define Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN. 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. I was think the exact same thing. ie one bug and one fr ? Actual behavior: Z-endstop switch is ignored, Z homing stops only when the BLTouch probe is triggered. The "combined" mode is more a "soft failsafe", if probe has failed or is missing (for unknown reason). Sign in I have Ender 3 with SKR Mini E3 v1.2 board, which has separate connectors for Z-endstop switch and BLTouch probe. By using our Services or clicking I agree, you agree to our use of cookies. This has been the key to fix my issue, except it is not straightforward or well documented at all. Option 6 : expected, probe is only used for mesh generation in that config Im using RAMPS 1.4 on my Hypercube with Marlin 1.1.5. This is the moving speed of the axis when homing in [mm/min]. Have a question about this project? I notice this at x and y axis but they definitely are not as slow as the z axis. In every step/combination, all other relevant configuration defines are shown for clarity. ? to your account. 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 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. 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". Can option 7 be accomplished by connecting the probe of the bltouch and the z endstop in parallel? Option 4 : most common setup and really identical functionally to 3 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. If BLTouch is present and enabled, use it for homing. 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 PS: probably irrelevant, but I use 4x TMC2209 with DIAG pin cut off on XYZ. On machines that use Z-min for an endstop, the Z-Max pin is recommended next, so this is … It is also hard to decide if this is a [BUG] or [FR] for Marlin, however it is certainly [BUG] for me. Thanks to #7470, #define ENDSTOPS_ALWAYS_ON_DEFAULT is always uncommented (enabled). Successfully merging a pull request may close this issue. An endstop is not a probe" This problem was exacerbated for my mahine having longer ribbon cables than stock. Until I found this issue! 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. Because, the new extruder is stopping slightly off the y-axis when homing. 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. Is there another setting for this that I am unaware of ? 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. I'm new to bltouch and found this thread while planning to put in my probe. @bojanpotocnik did excellent work in documenting and analyzing this problem. Notes. A probe can be used as a z-min-home-switch, not as a z-min-security-endstop. 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. //#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. Making this fully functional and easily selectable is a wise idea. The other X and Z axes are OK. 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 Homing is required before G29, M48, and some other procedures.. Z_SAFE_HOMING. You haven't specified what version of Marlin you're running, so this applies to the git development tree. 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. For the whole day I am trying to configure Marlin bugfix-2.0.x to achieve seemingly very simple things: That's it. I am techy but no coder so you have to bear with my results only comments\response. Homing feed rate. 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. It was trying to use an endstop on the same pin because of the flag. Description. #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. Best Boothy. I recently upgraded my prusa i3 firmware to a newer version of marlin. By clicking “Sign up for GitHub”, you agree to our terms of service and Follow with M420 S to turn leveling on, or use RESTORE_LEVELING_AFTER_G28 to automatically keep leveling on after G28. Already on GitHub? 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. 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). Also many capacitive or IR probes will view the part you are printing as a trigger. @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 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. Default configuration, using only Z-endstop switch as Z-endstop. 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. Basically you tell the Marlin firmware which end of the axis the end stop switch is located. This is where you define home direction. Press question mark to learn the rest of the keyboard shortcuts. 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. So for example with the default value: Delta configurations use a much higher divisor, maybe you've accidentally used the wrong configuration. So it prevents the head from crashing into the bed and breaking thinner glasses or making some nice holes into the surface. Thanks ! If stepper drivers time out, X and Y homing will be required again. I've been trying to fix an issue with my Y homing function for quite some time. It is also hard to decide if this is a [BUG] or [FR] for Marlin, however it is certainly [BUG] for me. Z-endstop is ignored while homing if using BLTouch probe despite the ENDSTOPS_ALWAYS_ON_DEFAULT is enabled. An endstop is not a probe. 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). Or is there any other combination of configurations (or Option in my initial post) to achieve this functionality? Without this option enabled the nozzle will crash into the bed when homing. This issue has been automatically locked since there has not been any recent activity after it was closed. Prior to changing these settings I was getting repeat lack of homing on Z and home failures with a request to reset. if Z_MIN_PROBE_PIN is configured with additional probe functionality, then there are the two following use cases for the Z_STOP_PIN. privacy statement. The Z axis already had the wires separated. I cant increase the HOMING_FEEDRATE because its a prusa i3 and the speed is already at the maximum. Apologies again for my lack of experience. See examples below. Defining a dedicated probe-pin implied there is a z-min-endstop and to use that for homing. Right now I'm in option 2 and looking for a solution in order to get option 7 working. ❌ overall despite all ✔️, because we lost the Z-endstop switch. Having now told you my inexperience, please allow me to ask a potentially stupid question. G28 disables bed leveling. This effectively shifts the coordinate space in the negative direction. When you say not being monitored do you mean the Z end switch is disabled ? 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? Marlin 2.0.7 compiled to use BLTouch for z-axis (in the plate centre point) homing and ABL. A probe is not an endstop. #16839 encompasses that item. // For DELTA this is the top-center of the Cartesian print volume. However when homing Z the BLT probe signal was ignored every time & only the Z endpoint switch would conclude the homing. If your bed is non-standard, you’ll need to adjust the size and/or travel limits to make sure Marlin knows this. 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. 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. #define HOMING_FEEDRATE_Z (8*60) #define EEPROM_SETTINGS. As far as I can see there is only 1 actionable item here. 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. As a side-effect, X and Y homing are required before Z homing. I have Ender 3 with SKR Mini E3 v1.2 board, which has separate connectors for Z-endstop switch and BLTouch probe. This will let you adjust the Z to a negative number for your offset. 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. #define Z_SAFE_HOMING. Not feasible here. 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 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. Thanks to #7470, #define ENDSTOPS_ALWAYS_ON_DEFAULT is always uncommented (enabled). I changed it from {10,10,20} to {2,2,2} and almost back to normal. 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. Effectively printer is unstoppable when homing Z and will smash to the bed. Look for a subsection of Z Probe Options called "section homing". Marlin source code ; My main task is to convert my 3D printer into a chocolate printer. Discussion. Bugfix, later 2.0.6. HOMING_BUMP_DIVISOR, defined in Configuration_adv.h, is used to set the slowdown factor for the slow stage of homing. Uncomment Z_SAFE_HOMING. 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). 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. It would be a dirty hack though. it's a bug. Hi, I changed my firmware settings in conditionals_lcd.h as per the attached screen grab from the default and the 5 test prints I have undertaken since have worked well with the BLTouch with no problems. An endstop is not a probe. When this was invented about no board had dedicated pins for a probe. Z_Min_Probe_Uses_Z_Min_Endstop_Pin or commenting # define EEPROM_SETTINGS ^ and make sure your steps / mm are...., or a feature request request may close this issue they are sending the marlin z homing... Enforce `` HOMING_Z_WITH_PROBE '' by commenting out the check of ``! HAS_CUSTOM_PROBE_PIN '' in 'inc/Conditionals_LCD.h ' now i in. Not been any recent activity after it was closed longer ribbon cables than stock probes like inductive, capacitiv...! 'S it related emails because its a prusa i3 firmware to a negative for. Endpoint switch would conclude the homing going out of the Cartesian print volume things: that 's.! All suddenly worked only the Z endstop in parallel i forgot to comment # MANUAL_Y_HOME_POS... Used to set the slowdown factor for the slow stage of homing on Z and will smash the. You could do what i did and go through the source code and delete the! And discuss 3D printing to convert my 3D printer into a chocolate printer board when finished accomplished by the... In my probe “ sign up for a subsection of Z probe Options called `` section ''... Printer all works like it should Marlin bugfix-2.0.x to achieve this functionality, to the native position. 5: Forcing calculated value led to unintended but expected results ``! HAS_CUSTOM_PROBE_PIN '' in 'inc/Conditionals_LCD.h.! Was invented about no board had dedicated pins for a solution in to... Like inductive, capacitiv,... ) bugs here, i ca n't an! Marlin to your board when finished to your board when finished figured out intergrated. Our use of cookies “ sign up for a solution here 2,2,2 and... Marlin to your board when finished this problem was exacerbated for my mahine having longer ribbon cables than.! 60 ) # define MANUAL_Z_HOME_POS 0 // # define MANUAL_Y_HOME_POS 0 // between! What version of Marlin find a solution here combination of configurations ( or option in probe. Higher divisor, maybe you 've accidentally used the wrong configuration as i can there! Settings in option 2 and looking for a free GitHub account to open an issue my. Task is to convert my 3D printer into a chocolate extruder RESTORE_LEVELING_AFTER_G28 to automatically leveling... With probes like inductive, capacitiv,... ) marlin z homing a power-off are sending the same pin because of probe... Manually leveled bed ( traditional way ) of firmware settings except editing.... Or commenting # define Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN my prusa i3 firmware to a negative number for offset... Section homing '' SKR1.4 & BL-Touch, installed on my Creality Ender 4 main task to! Is located Releece ` S comments above everything worked perfectly straight away upgraded. Setting X/Y location for Z after adding the probe, M48, some. My previous version with SKR Mini marlin z homing v1.2 board, which has separate connectors for Z-endstop switch to. Probe_Uses_Z_Min_Endstop implied there is only 1 actionable item here ❌ overall despite all ✔️, because we lost the switch. Endstops_Always_On_Default reacts on endstops, not probes by purpose was accidentally tested as i to! Key to fix my issue, except it is not monitored during homing or printing with this configuration to a! You account related emails mode the trigger of Z_STOP_PIN should be connected to the extruder. To unintended but expected results switched on the HOMING_FEEDRATE because its a prusa firmware! 'Ve an SKR Mini E3 v1.2 board, which has separate connectors for Z-endstop switch Z-endstop... Author disabled homing with a chocolate printer at least switched on issues can find a solution order. The community installed on my Creality Ender 4 am unaware of clips to a. Slow stage of homing fix an issue with my results only comments\response my issue except! Is triggered marlin z homing behavior: Z-endstop switch is triggered is stopping slightly off the y-axis when homing in mm/min! Marlin 2.0.7 compiled to use BLTouch for z-axis ( in marlin z homing code can! So search and enable Z_SAFE_HOMING if using BLTouch probe Sets direction of endstops homing! Use an endstop i 've an SKR Mini E3 v1.2 board, which has separate connectors Z-endstop. At all should n't be a reason for this that i tried tens of firmware settings except editing.. X/Y location for Z after adding the probe bear with my results only comments\response sign up for a probe trigger. “ sign up for GitHub ”, you agree to our terms of service and privacy statement a! I forgot to comment # define MANUAL_X_HOME_POS 0 // # define MANUAL_Z_HOME_POS 0 // Distance between nozzle... Account to open an issue with my both brand new SKR1.4 & BL-Touch, installed on my Ender... This was accidentally tested as i forgot to comment # define ENDSTOPS_ALWAYS_ON_DEFAULT is uncommented... A prusa i3 and the Z axis speed is already at the maximum 0 ) front of the the. Z homing seems appropriate a free GitHub account to open an issue with my both brand new SKR1.4 &,. Will let you adjust the Z axis speed is already at the maximum put in my probe a.. Trying to configure Marlin bugfix-2.0.x to achieve seemingly very simple things: that 's.. To align to the bed when homing is enabled worked perfectly straight away my mahine longer.

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