After homing in z, the hardware z endstop is deactivated (unless you have set ENDSTOPS_ALWAYS_ON_DEFAULT in configuration_adv.h, which can be overridden by M120, M121), but to protect the hardware a software endstop is activated (which in turn can be overridden … So, I do not require Z_SAFE_HOMING. I also cannot compile my firmware because of this. Selecting a nozzle type is a little confusing since the wording seems to indicate that a FIX_MOUNTED_PROBE (a nozzle-based probe-switch) and a NOZZLE_AS_PROBE (conductive nozzle system or a piezo-electric smart effector) are the same thing. I use the waterott TMC2130s. to your account. The option used to be called PROBE_DOUBLE_TOUCH (just comment it out), but recent versions of Marlin are using a MULTIPLE_PROBING count (so MULTIPLE_PROBING=1, and I bet you need to bump up the "slow" probe speed). idk) will let you print without homing Z as long as it knows where zero is. Hi. Follow with M420 S to turn leveling on, or use RESTORE_LEVELING_AFTER_G28 to automatically keep leveling on after G28. You can do better than that! I don't have a dump area, therefore, my nozzle never will go off the bed. You would do this by going into Configuration.h and moving these lines: #define Z_SAFE_HOMING // This feature is meant to avoid Z homing with Z probe outside the bed area. -#define DISABLE_INACTIVE_Z true // Set to false if the nozzle will fall down on your printed part when print has finished. Usage M121 . 2 years ago. Marlin Github Scripts; Contributing to Marlin; Feature requests; Adding new fonts ... control Disable endstops and keep them enabled when not homing. #error "Z_SAFE_HOMING is recommended when homing with a probe. 2. Notes. Notes. I have tried several Marlin releases (including 2.0) and nothing, following all the steps and nothing. If you want to use PID to efficiently heat your bed, uncomment #define PIDTEMPBED. If I enable Z_SAFE_HOMING and change the X_POINT & Y_POINT to 0 then I have enabled the feature but disabled the intent that I do not need. Already on GitHub? Or make it go the same speed as the initial tap? Now it sounds like it wants to be a BLTOUCH or other probe type seperated from the nozzle that are defined elsewhere. #define Z_MIN_POS 0. Several printers, when homed, have the nozzle in a position which is off of the bed. So it is telling me to do what I have already done. If I manually move the head so that the 0 position is in this small window the printer will c This is where you define home direction. From my noodling around it seems as long as your z moves smoothly the faster the better. Getting Decent Results Now. I would like to look at them as I am curious as to why they would do that. Its max is 130, and it heads upwards at full tilt, but doesn't make it halfway before slowing for half a revolution and stopping. Steps to Reproduce Build or purchase an XY plotter, with no Z axis. When I instruct the printer to home it only goes ~1cm in each direction and stops well short of the end stop. This is a no nonsense, simple guide (and note to self) to configuring Marlin 2.0 for the Ender 3/Pro with BLTouch ABL sensor. The X and Y ones work just fine, the problem lies with the Z-homing. "Enable it or comment out this line to continue." Close. either enable Z_SAFE_HOMING or disable the check in SanityCheck.h. I then set Z at zero, G92 Z0. Is there some way I can configure marlin to use the Z min endstop as an "oh shit, something's gone wrong, abort" button? Z_SAFE_HOMING as detailed in the comments indicates that it is to prevent a nozzle mounted probe from homing off the bed. Marlin 2.0 on the SKR 1.3 with TMC2209 and sensorless homing August 31, 2020 May 29, 2020 by Daniel In this video, I show you how to configure Marlin 2.0 for the SKR 1.3 mainboard with TMC2209 stepper drivers and sensorless homing. * To use a custom Z Probe pin, set Z_MIN_PROBE_PIN below. It probably would be better stated as a carriage mounted probe. I activate the Z_SAFE_HOMING option. Disable endstops. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Even with -64 sensitivity I can't make it to work. I’m not really sure why this is even being debated. It seems to move the same distance each time, but I don't know for sure. This prevents your Z homing from occurring without prior X and Y homing. After you compile and flash it should do both taps at the same speed. Description. G28 disables bed leveling. New comments cannot be posted and votes cannot be cast. A NOZZLE never goes off the bed unless something is configured wrong or there is a dump area. @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. How can i disable the second tap? Disable 'double tap' z homing on marlin. Back in the Marlin pre-1.0 days some sanity checks were included that said "uncomment this check if you understand the risks," and that custom has been retained for some things. // 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. 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. 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 firmware.I am going to use Pronterface/Printrun host program to connect to my printer and issue terminal commands (G-codes). A NOZZLE never goes off the bed unless something is configured wrong or there is a dump area. For extra clarity, here’s how the Z minimum endstop looks when enabled: #define Z_MIN_PIN 18 and here’s how it looks when disabled: #define Z_MIN_PIN -1 //18 I don’t use MAX endstops, those are endstops placed at the maximum ends of an axis. But still, I will get an error for something I don't need. But on the slower second tap it does not trigger. 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. The "paper drag" method is perfect for determining the correct Z level. This appears to have worked because i now get two taps at the same speed. I moved to print head to my desired X, Y, and Z positions and checked it against the model, which seemed to be right. Description If you do not have a Z axis and therefore no Z endstop then auto homing fails waiting on the Z axis. In every step/combination, all other relevant configuration defines are shown for clarity. You now have code that supposedly works for off bed nozzles, with explanations that are only known by the developers that are trying to tell people to modify something that should not be modified - your sanity check. I don't know that it will work, but it has a fair chance of working. They can be used for homing … Movement settings Define the number of axis. By clicking “Sign up for GitHub”, you agree to our terms of service and They really seem to like booping the bed with speed. If homing is needed the LCD will blink the X Y Z indicators. Previously, FIX_MOUNTED_PROBE was a nozzle probe. M915: TMC_Z_CALIBRATION (Deprecated in Marlin 2.0.) Apparently Marlin (or Octoprint? The Anet A8 for one - the endstops are at X=-33 Y=-15 or so. Archived. Then it is required to use Z_SAFE_HOMING because my NOZZLE_AS_PROBE might be outside the bed area. In the configuration_adv there is a setting for 'homing bump divisor' i changed the Z value to "1" so the homing speed on the initial dive is the same as it is on the bump dive. And what is the need to define 2 different probes that appear to be the same? This is the moving speed of the axis when homing in [mm/min]. Without this, you may accidentally miss the bed when homing Z. "Z_SAFE_HOMING is recommended when homing with a probe. // Comment the following line to disable PID and enable bang-bang. I have Piezo Z probe, and on the initial regular speed z homing dive, it looks to be spot on, repeatedly. Thanks to #7470, #define ENDSTOPS_ALWAYS_ON_DEFAULT is always uncommented (enabled). 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. Under normal circumstances the switch will never be hit, only if the BLtouch fails for some reason. :x: BLTouch is NOT deployed while homing Z.:heavy_check_mark: BLTouch is not monitored while homing Z. Have a question about this project? Homing feed rate. But if it 2 negatives work when printing and it homes at 0,0 with X&Y = 0, then you can close this issue because it is obvious someone does not understand. Setting up Marlin is fiddly at the best of times. Its a Marlin/Ramps setup. ... (By default Marlin assumes the Z-Max endstop pin.) Thanks. There is no way to auto-detect this, so we ask users to supply this information in their configurations. The site may not work properly if you don't, If you do not update your browser, we suggest you visit, Press J to jump to the feed. I issue the command, and Z homes first to get out of the way. Examples. Discussion. Other than of course to read your mind and interpret something totally uncommunicative and mess with your Sanity Checker. So how do you program Marlin so all the others that do not don't have to wrestle the code down to make it work for them? Many common printers have their end stops set such that the nozzle is off the bed when they home. Now you are asking people to configure your configuration error checker. #define DISABLE_INACTIVE_E true: #define DEFAULT_MINIMUMFEEDRATE 0.0 // minimum feedrate Expected behavior: Since I do not need this "feature" and the error says I should either enable it or comment it out, it should compile either way and not give an error. Basically you tell the Marlin firmware which end of the axis the end stop switch is located. Hi, I'm trying to switch from sprinter to Marlin (RC2) and I'm running into issues with homing. Does that seem as absurd to you as it does to me? So why do you make it a requirement? Enable it or comment out this line to continue."" Homing is required before G29, M48, and some other procedures.. Having to revise your configurations every update certainly doesn’t help. This is not :x: because of the reason described in Option 3 point 3.:x: Z-endstop switch is NOT monitored when moving Z axis down via LCD menu or G0. SENSORLESS_HOMING: Set SENSORLESS_HOMING sensitivity. Then this error message is also confusing: That doesn't resolve the issue that I do not need Z_SAFE_HOMING and the only way to get around it is to enable it and set X&Y to 0 thus disabling it. as The movement is done at a reduced motor current to prevent breaking parts and promote skipped steps. There might be a better way to do this, I'm not sure. I have Piezo Z probe, and on the initial regular speed z homing dive, it looks to be spot on, repeatedly. **Actual behavior:**Won't compile, fatal error. Marlin will then rehome Z axis and restore normal current setting. 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. The text was updated successfully, but these errors were encountered: read the error Looks like you're using new Reddit on an old browser. Marlin supports these configurations just fine as long as you set X_MIN_POS and Y_MIN_POS accordingly. E3D v6, and the 'Orion Module' Piezo probe from precision piezo. I am currently running my homing_feedrate_Z at 10*60 for both taps. We’ll occasionally send you account related emails. As a side-effect, X and Y homing are required before Z homing. To increase the homing speed, increase HOMING_FEEDRATE_XY from (20*60) to (40*60) and HOMING_FEEDRATE_Z from (4*60) to (8*60). What happens if you turn on Z_SAFE_HOMING and don't turn on the Auto Bed Leveling? So using Z_SAFE_HOMING and setting X/Y location for Z homing seems appropriate. You can not only change the Z offset in the slicer or in the configuration of Marlin, but also with G-code commands. Printers do it. 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 got the error because it is not enabled ==> commented out. From the display go to the Menu then Prepare/Move axis/0.1mm/Move Z Now move the Z axis slowly down until the nozzle is the right distance from the build plate (folded piece of paper or thin card). And as mentioned above, that may allow for probing more of the bed if, for example, the probe is to the right of the nozzle. T… After this command endstops will be kept disabled when not homing. Disable 'double tap' z homing on marlin. Press question mark to learn the rest of the keyboard shortcuts. Right now I'm having issues making sensorless homing to work. * Note the Z axis value on the display it should be something like -1.5 M851 Z … It probably would be better stated as a carriage mounted probe. Successfully merging a pull request may close this issue. Discussion. If the probe is the nozzle, how do I get it outside the bed area unless I have a dump area, which I do not? When verifying MY configuration, beside the errors mentioned in #17974, I receive the fatal Z_SAFE_HOMING error. Posted by. Mine is a piezo that is activated by the nozzle touching the bed. The most obvious reason is that homing off the bed allows an offset probe or dual nozzles to reach the entire bed. It seems to be that the Piezo probe responds well to the faster move, but not the slower one. It's just a matter of how they're put together. What I … #define NUM_AXIS 4. Option 6 I found a solution to this problem. privacy statement. Sign in Even without a good reason that would be true. You do not need Z_SAFE_HOMING if you follow the instructions. * * - The simplest option is to use a free endstop connector. The Simplify3D profile I used with a MakerGear M2 would purge off the side of the bed then scrape it off on the side of the bed. When compiling it WITH Z safe homing enabled, my BLtouch does not work. Such is the case with G28 X Y or G28 Z. ... // - Allow Z homing only after X and Y homing AND stepper drivers still enabled. 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. But many commands in Marlin use parameters only as flags, and their mere presence is the trigger for a change in behavior. What I did in marlin was comment out the slow probe speed in configuration.h so it looks like this: // Speed for the "accurate" probe of each point, //#define Z_PROBE_SPEED_SLOW (Z_PROBE_SPEED_FAST / 1.5), After doing this, open marlin_main.cpp and search for Z_PROBE_SLOW and change the slow to FAST. Look for a subsection of Z Probe Options called "section homing". You signed in with another tab or window. Effectively printer is unstoppable when homing Z and will smash to the bed.

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