marlin sensorless homing

Marlin-2.0.7.2_SKR1_4. If you decide to acquire it through these links, it is my duty to tell you that a small commission will go to the 3DWork.io project and we will be eternally grateful to you. Thank you ! The higher sensitivity also produces a much softer hit on the axises. Below I leave you 2 images so you can see where the BLTouch would be connected on my board, and on a RAMPS board, much more common than the one I own. For the rest, I have no idea why is doing that. Sensorless homing will not work with the pin removed unless you add a jumper from the top of the driver from the DIAG to x_min signal and Y_min signal. In my printer I use a leveling function available in Marlin 2 called BABYSTEPPING. Now we uncomment the option Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN. Everything working as intended. @407s for sensorless homing there is no need to remove the pin. Finally remind you, as always, that you can find us on our Telegram channel full of maniacs by 3D printing at next link, or on our social networks (don’t forget to follow us if you like the web). I have just configured a TMC2209 for my X axis, with UART. MarlinFirmware/Marlin. In this way we can continue writing 3D printing guides and articles on interest. TMC2209 v1.2. Same setup here SKR 1.3, and BTT TMC2209 v1.2, was having the same problem using source from BTT repositories, my situation was trying to home to XMax and YMax, found 2 possible solution I downloaded the latest Marlin bugfix version which is 2.0.6 at the moment of writing this article. In this way, and in real time, you can adjust the offset while you are making the first printing perimeters, and leave a perfect fit. Also I found that 2209 have not the same sensitivity and my guess depends on the quality of the silicon. Sensorless homing is a feature that is supported by the TMC2209 stepper drivers but there is also other models that support this like the TMC 2130 for example. When the probe is retracted, it must be above the nozzle (otherwise we will have problems). Diag pin of TMC is well connected to Zmin signal, and Zmin work well when I put it to Vcc. @hackebike 120 on both x and y running on a corexy setup. Stuck at maximum coordinates. will close this one as its most likely down to tune and machine setup Hi I have a skr pro v1.2 and picked up a 3d touch the board hS a special place for the bl touch/3d touch… my 3d touch touch does not have aa connection for that spot ware would I plug it in on that board…. If we use a self-leveling sensor (either BLTouch or any other), we must indicate to Marlin the position of the sensor with respect to our print nozzle. Why not install a leveling sensor to level at a single central point in the bed (SAFE_HOMING), and let Marlin generate the mesh of points and worry about the rest? Regardless of where it is located with respect to the X and Y axes, which are the ones you must configure in Marlin, you have to position the BLTouch / 3DTouch sensor at a certain distance in height from your nozzle. For a sensor less homing routine, we suggest setting the current to a low setting, and moving at a slow speed toward the hard stop. I usually make 9 checkpoints before each print, you can expand or reduce it, that is up to you. Best regards, thank you for this little tutorial which is very useful, you forgot to mention the adjustment of the bed surface (the most important), which to change file in version 2.0 of marlin, probe_selected in the configuration_adv.h file, for what its interresse here is a link with all the explanation for this setting, https://3dprinting.stackexchange.com/questions/8153/how-to-set-z-probe-boundary-limits-in-firmware-when-using-automatic-bed-leveling. No sensativity setting seems to change Triggered State in M119. Once the motor reaches the current setting limit, the TCL output will activate to communicate when the hard stop is reached. The issue is also a tad more complicated than I thought. Later, the printer will perform 9 probe points automatically at the beginning of each print. So the question is extremely simple. Here is a video and the configs files in the description. Activating sensorless homing is pretty straightforward but, if you want to get stallguard information on the z axis, it requires to plug the Bl-Touch in the Z max pin instead of the Z min. You signed in with another tab or window. Just adding in i have this exact issue. You are right the sensitivity value is a pain to find. I have tried setting up floats for the value but it won't accept them, and I also tried switching it with another TMC2209 with exactly the same result. Specs: SKR1.3, TMC2130 Sensorless Homing, Marlin 2.0.5.3, Ender 3. Using the very latest Marlin 2.0 bugfix, they work as expected on my end. This feature is so sensitive that it can actually take the place of traditional endstops. This connection is similar, but you must make sure that you have the jumper activated, so we will make sure that the level sensor reaches the 5v. Thus you would place a … I usually use optical infrared sensors for my printers, but I wanted to try the BLTouch sensors since none had fallen yet by my hands. Onboard Sensorless homing function, which can be used by plugging in the jump cap 4. on the skr pro manual it states that you cut it if you want to use endstop switches, you keep it if you using sensorless homing/probing. Disabled Quick home. Both Z motors dock on for a while at the top with a long 'brrrrrrrrrrrrrrrr-brrrrrr', instead of the quick 'br-br' that X and Y now do. Recently a colleague sent me a BLTouch / 3DTouch sensor from the Geeetech brand. Hey, im having exactly the same issue except my endstops are now reading "open" on X/Y but the motor just stutters as if its sensitivity to sensorless homing is very low? I just have a question, you mention you burnt your MKS board by sending a 12V signal to a 5V pin. Lowering the current before homing works perfectly for me! I've tried to switch motor and driver with no luck. TFT 35 V3. The recommended is 2mm. It just seems impossible to find the correct number. I have been doing plenty more testing and I can definitely confirm that in my case, stallguard is consistently triggering when at the start of the homing for an axis there's something bumping on the carriage (provided the sensitivity value is high enough). Marlin.zip. To me this has saved me the odd impression, the truth is that it is quite useful. If you have issues with some versions of Marlin (sometimes happen), use the ZMin connector. @boelle I appreciate that you want to keep the issues down, and this may be hard to reproduce, but I've shared as much info as I can and so far I've had very few suggestions as to what I might be able to try configuration-wise. The 2 wire is the same as your example, but the spot that you show on the boards don’t exist on mine. Sensorless Homing work well for X,Y and Y2, but I can't get it to work on Z. I've tried allmost every settings of sensitivity, current, and speed. Very easy as you have been able to check, click on those 2 sites and that’s it. It feels like what is happening is that with the higher sensitivity number, it stallguard triggers with literally nothing connected to the stepper driver as soon as it starts, and the lower sensitivity numbers never trigger. 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. What would i change if I wasnt using the mechanical z endstop? Indeed, your TMC motor currents must be tuned appropriately to your stepper motors or they can't get good readings. With the optical sensors, which I love, we forget about these variations since under normal conditions they do not affect the type of metal or the temperature. And when it is extended, it must lower several millimeters below the nozzle to be able to act. to your account. A few prerequisites are needed to use sensorless homing: 1. Bump sensitivity might be dependent on motor current. SPI / UART interface of the TMCxxxx wired to MCU (stand-alone mode does not work) 3. This function allows me to calibrate the height of my leveling sensor in the center of the bed once with a sheet of paper. For more reasons, you can install capacitive or inductive sensors, but these types of sensors vary depending on the temperature of the bed and the metal. TLDR; The Creality machines do not need more than 1A per stepper driver and sensorless homing is useless (and inaccurate) on a printer that already has endstop switches. This procedure is not optional. Sign in 50 homings - 3 "never triggered", 47 triggered as soon as it started @ X_STALL_SENSITIVITY 169 Also I found that 2209 have not the same sensitivity and my guess depends on the quality of the silicon. 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. So I suggest you to test more to find the right value, mine are X/Y 60 and Z 94. Maybe printer think, what axis already in initial position... and they triggered.... just an info, you can't have sensorless homing and endstop switches on those boards at the same time, or one or the other. We will start the configuration by editing the file Configuration.h with your favorite text editor (mine is Sublime). Is the schematics that you provide in your article is the good one to avoid frying a board ? In the end, so that everything is square, you end up making several passes, especially if you are a precision maniac. Once you have edited it, we are going to indicate to our dear Marlin that our 3D printer has a limit switch (sensor) on the Z axis. Using TMC2209 and these stepper motors, on the bugfix-2.0.x branch: Expected behavior: Stallguard triggers when it hits something. When the carriage is not homed at the time the sensorless homing starts, it'll simply keeps going until the printer is killed, or it errors with a failed homing error. I can definitely rule out a hardware issue with the drivers themselves (because I've tried 2 different brands) or connections with my tests. I don't think closing this issue with a comment saying this is a setup issue is helpful to anyone. I don’t want to calibrate that distance again if I change the filament from PLA to ABS, it’s a hassle. They both are running StealthChop V2 for extremely quiet printing. Direction in conf - ok. Then i activated function, mechanical switches was unpluged from board and installed special jumper in XST and YST slots. So basically, @boelle was correct in saying this was a setup issue, but to my knowledge, the homing speed affecting the sensorless homing isn't documented anywhere. I have a suspicious playing with values such as off time, blank time or hysteresis values might be the answer to solve this. If stealthchop is disabled or disabled by hybrid settings, it will not work. MarlinFirmware/Marlin. I usually use optical infrared sensors for my printers, but I wanted to try the BLTouch sensors since none had fallen yet by my hands. I will point out that with the SKR v1.4, there is no way to disable sensorless homing (unlike other boards that use a jumper), and as sensorless homing is currently not supported, you will have to either remove or bend the diag pin on the TMC2209 to be able to use mechanical endstops. If you can’t find it, you can alternatively run the command M500 (Save settings). See various YouTube videos on how to get the current well tuned with a multimeter. I just got (and tried) a couple of watterott TMC2209's, and I'm getting the exact same result as I was with the BTT drivers. Yes, you can connect to the SKR Pro due it have dedicated connector. It is simply adding the G29 command to level your head before each impression. Thank you for clarifying that. Yes, i know. All the options I'm left with are that this is a firmware issue, or that this is a hardware incompatibility issue (as in my stepper motors not being compatible with stallguard on the TMC2209).