Because Marlin assumes Z_MIN_PIN is always going to be used. but a "Home XY" in INDIVIDUAL_AXIS_HOMING_MENU would still be nice and helpfull for some guys out there. To measure an offset between a trigger point and the bed, lower the nozzle to the trigger point (by homing, if it’s the homing device), and note the z-value. according to the Makerbot design: A more simple variant, that can easily be fitted to existing endstops is a 100nF capacitor, soldered over the two endstop connector pins (in parallel): Illustration 10: Endstop with 100nF capacitor. // Individual Axis Homing See here. Printer homes X and Y, then Z at the same spot (X = 0, Y = 0). Suggested Fix Illustration 11: Endstop characteristic with hardware filter. // Add individual axis homing items (Home X, Home Y, and Home Z) to the LCD menu. Software endstops can be (de-)activated via the M211 G-code. Probes can act like an endstop for the minimum Z-axis. This will fail after timing out waiting on the Z endstop you don't have. While probing, all endstops are turned off so that the probe can reach into the valleys of the bed. to your account. The difference is the height of the respective trigger point above the bed. Nevertheless (and even if this might be low-priority as it can be circumvented for now), supporting two- or even one-dimensional machines one day should be in the code. Configure Marlin Open the Configuration.h file/sketch/tab and scroll Down to the @section homing - around line 330 or so. Simple measures like adding a capacitor will already improve the situation considerably, overall improving reliability of the machine. Attempt to use the "auto home" function in the Marlin firmware. Illustration 11 below shows the effect of such hardware filtering: The noise level is smoothed and peaks will be reduced so much that they no longer will cause false readings. by a broken cable etc. To measure this see here. Printer is a Wanhao i3, newly upgraded with an SKR 1.4 turbo board and BLtouch sensor. Illustration 2: Most common endstops (left to right): Micro switch, optical endstop (light barrier), hall sensor (magnetic). // Additionally the fast bouncing at the beginning of the triggering will also be damped. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. I need to be able to change the Configuration.h for unconstrained movement while devleoping this. Marlin: 2.0.6.1 and bugfix-2.0.x§ I have two axis z and two endstop (Anycubic i3 mega), I configured NUM_Z_STEPPER_DRIVERS = 2 and assign endstop pin to x_max and setting the x_max pin value into pins skr 1.4 . The process of bed-leveling generates an array of z-values of the bed heights at the probed points. I’m using dual endstops on the X and Y axis, and no endstop on the Z axis. There are numerous counter measures preventing noise: In the following the options 3 and 4 will be discussed further. Description. Steps to Reproduce. In a 3D printer itself, there are also some prominent and strong sources of such noise: The Electromagnetic Interference created by these sources are picked up by other components, either because they are directly connected or via radiation. This is going to be a, hopefully, complete tutorial on configuring endstops on 3D printers build on Ramps 1.4 using Marlin firmware.. I setup Marlin on all my printers which are all different (cartesian, delta, coreXY) and still continue to do this kind of mistake. This means the system needs first to establish its starting point of the physical (machine) coordinate system, a process called Homing. Some aspects of probe configuration are considered in this endstop introduction. Note that when using bed-leveling, this software endstop is applied to the uncorrected slicer generated z-values. Using this feature is not recommended. While the typical endstop has a fixed position, the probe is mounted on the print-head and can freely move around the bed. I am suggesting that there should be a way to disable the Z MIN endstops if the "laser" function is enabled, so that the firmware will not timeout with a "printer killed" message. You can tweak it using M851. Marlin Pyr0-Piezo Rev.2.x.x¶ Endstop logic configuration¶ Comment #define ENDSTOPPULLUP_ZMIN (or other pin if using a different connection) Set Z_MIN_ENDSTOP_INVERTING to “true” Enable Interrupts¶ This only applies if you are running Marlin v1.1.9 or later. We’ll occasionally send you account related emails. It’s a good lesson to be humble lol. Regardless of the type the basic way of working is the same: Since endstops are a safety feature NC switches are recommended as they will halt the machine should the switch be damaged, e.g. The yellow marked area in Illustration 7 shows the area where the software compensation is active. Recently a colleague sent me a BLTouch / 3DTouch sensor from the Geeetech brand. The other important aspect of an endstop is protecting the hardware from damage. Anyway, when I do a Home for all axis (G28) the gantry moves up to bump against the max-Z switch, then homes X, then Y - all just like I would expect (double bumps, gantry left with all 3 switches activated). PS: u can also disable/enable software endstops with M211 S1/S0. The z location of the hardware (microswitch) trigger point defaults to the value of Z_MIN_POS. The configuration is illustrated in Fig. This offset is applied by the firmware when homing in order to properly reference the coordinate system to the nozzle position. privacy statement. If you are using an LCD+encoder that will not work. We now describe some common Cartesian printer configurations, with and without bed-leveling probes. Make a list of the endstops which shows the staus as TRIGGERED when not triggered, or just keep pronterface open to see the output. Your answer only works if you have a computer connected. Endstops are reported as either “open” or “TRIGGERED”. The first yellow area is an effect due to noise and the algorithm decides that no endstop is triggered since the signal falls back to a Low state. The endstop switches will be plugged into the X, Y, and Z endstop inputs (there are no min and max inputs, just a single input for each axis). Some printer controller boards already contain such filters located at the endstop connectors. I flashed Ryans dual firmware to the board but this is for the MPCNC more so than the Lowrider. I love Marlin but cannot get my head around this Dual Z limit switches. it is a piece adapted for an Anet A8, with the situation of the sensor in another different position, added a nut and with the pin turned, it is impor Have a question about this project? Copy link Contributor Bob-the-Kuhn commented Jun 8, 2017. Marlin interpolates these values to estimate the bed height at any given x/y location. The useful signal needed by the other components will be disturbed or even altered so much that it is no longer useful. In general, on deltabots the probe should be connected to the unused Z-Min endstop pin (if there is one). I've already saved the … It is possible however to use a microswitch trigger point above the bed by setting MANUAL_Z_HOME_POS to the z-coordinate of the trigger point. Yes I totally accept all responsibility for crashing into the hotbed or it flying off and hitting the ceiling etc. This will lead to delays and finally to a precision loss in the detection of the endstop. Since I hadnt changed the firmware since the last post, must have still been thre, or some other problem. Time guillotine on marlin. Hardware filtering can range from a simple capacitor in parallel to the switch over a resistor / capacitor combination (RC-unit) up to opto-couplers and flip-flops. This allows printing into the hollows of the bed, where z < 0. Right now, G28 first lifts Z by 10mm, homes X and Y, and then tries to home Z, but since there is no endstop it would push the spindle into the wasteboard and probably rip itself apart. I am going to use Pronterface/Printrun host program to connect to my printer and issue terminal commands ().That sounded very hairy, but it is just a simple program with a graphical interface. Successfully merging a pull request may close this issue. Of course my changes were not taken into account. Use this command to get the current state of all endstops, useful for setup and troubleshooting. 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. Another idea, UNTESTED and needs to be double-checked: There is a DIR pin for the Z stepper, and it will toggle between on and off. The state of the Z probe and filament runout sensors are also reported with this command. This is normally at z=0 at the nominal location of the bed. Currently I can move the axis up but never lower than the start point. Beginning with Marlin v1.1.9 and v2.0 the software measures against endstop noise are improved and exposed as a setting. Build or purchase an XY plotter, with no Z axis. I have endstop switches on min-X, min-Y and max-Z. https://www.youtube.com/watch?v=Idc2q0KSkAA. In today’s life an abundance of sources for Electric Noise exists: Mobile phones, microwaves, WIFI, power supplies etc. #define MAX_SOFTWARE_ENDSTOPS. But it now allows me to move up/down anywhere I need. I can't deal with Duet3d anymore, reprap firmware is as stable as a unicycle. For a remote sensing probe (e. g. inductive or capacitive), the offset might vary with bed material. I am looking for a marlin board with extension that can handle 12 stepper motors (4z 2x 2y 4e). See examples below. Hardware endstops are electrically connected to the endstop ports of the printer control board and will provide a signal when the endstop condition is met. I cannot have a computer where I am building the corexy so must only use the LCD+encoder. This then uses the value from #define [XYZ]_MAX_POS / #define [XYZ]_MIN_POS to determine the maximum distance between the physical endstop and the software commanded stop of the axis. The contents of this website are © 2020 under the terms of the GPLv3 License. Pleasure to return to sprinter. * (By default Marlin assumes the Z-Max endstop pin.) T… This is normally at z=0 at the nominal location of the bed. 3 thoughts on “Configuring TVRRUG Marlin for maximum Z endstop” Eric Rowen says: May 25 at 3:22 PM Hannah, Having not built a RepRap it’s easy to say this as I’m not aware of the mechanical constraints, but making a little setup to adjust the Z endstop microswitch one thou( = … Figure 2: Example configuration using a microswitch for homing, BL-Touch for bed-leveling probe. A deficit that has been corrected with the RAMPS v1.4.2 design: For 3D printing ready made filtered endstops are available, e.g. Active 10 months ago. Endstops or limit switches are used on every moving axes of a 3D printer. :heavy_check_mark: Z-endstop switch is monitored while homing Z.:heavy_check_mark: BLTouch is ignored (not deployed nor monitored) while homing Z.:heavy_check_mark: No BLTouch LCD menu. Marlin configuration files have been updated to reflect changes specific to my build (correctly? I have always used leveling sensors on my machines, … If you do not have a Z axis and therefore no Z endstop then auto homing fails waiting on the Z axis. 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 by M211 S0). Default configuration, using only Z-endstop switch as Z-endstop. Uncomment this line for best possible accuracy: #define ENDSTOP_INTERRUPTS_FEATURE When endstop if trigger z_min or z2_min all axis z stopped simultaneously and not z_min for z1 and z2_min for z2. By clicking “Sign up for GitHub”, you agree to our terms of service and Z axis. Maybe this pin can be connected to the Z endstop pin: Move down == triggered; move up == released. Hardware endstops and software endstops. Both states are somewhat unclean, Around the trigger point (marked in orange) an effect known as bouncing is shown: Due to mechanical influences the switch bounces between Low and High a few times before settling to High, Bouncing is unwanted but in case of endstops not a show stopper, Same characteristic as above but with a peak caused by EMI (marked in red), The peak is high enough to be falsely detected by the printer control board as pressed switch, potentially ruining a running print, Cable routing (route signal cables away from power cables). * - Use 5V for powered (usually inductive) sensors. * To use a custom Z Probe pin, set Z_MIN_PROBE_PIN below. Illustration 1: LCD indication not homed axes (Marlin <= v1.1.8). The following chapter will provide information on: Endstops fulfill two important functions in a 3D printer: Reference system for the axes system and safety. Electromagnetic Interference (EMI) or electric noise, is an effect which can ruin the clean signal needed to properly and precisely measure electronically, be it temperature, endstop hits or any other value. There are few questions I have with respect to the Z level in case of Manual Mesh Bed levelling. When I send an M119 (endstop status code) I recieve: Send: M119 Recv: Reporting endstop status Recv: x_min: open Recv: y_min: TRIGGERED Recv: z_min: TRIGGERED And then when I press down the X endstop with my hand I get: Send: M119 Recv: Reporting endstop status Recv: x_min: open Recv: y_min: TRIGGERED Recv: z_min: TRIGGERED -No change. Depending on the printer’s geometry and affected endstop, this precision loss may result in issues especially concerning the bed leveling. Figure 1 illustrates the situation. Sorry if its been asked before but im new to configuring Marlin. Now turn off the software endstop temporarily (with M211 S0) to enable lowering the nozzle further down to the bed. maybe not?). S1 sets them as active high. In the following High = Logic 1 = 5 Volt will be used for a pressed switch and Low = Logic 0 = 0 Volt for a not triggered switch. Marlin is a popular firmware used for this task but configuring it for auto bed leveling might prove to be a bit of a daunting task for some people. X2 and Y2 define the positions of the endstops at the maximum end of the X and Y axes. Here we mechanically adjust the bed and possibly additionally the microswitch trigger point to level the bed surface as close as we can to the z=Z_MIN_POS (normally = 0) plane. 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). This video explains how to setup a servo controlled z end stop. // The result of homing the z-axis should thus place the build surface at the z=0 plane. This configuration uses a perhaps more reliable microswitch for homing, reserving the probe for bed leveling, where Z_PROBE_LOW_POINT provides failure protection. The other suggestion if you do not wish you give the user a way to disable the Z endstop check during the "auto home" , would be to put a comment into the configuration_adv.h around the laser enable that if it is an XY machine with no Z that a simple jumper between Signal and GND for the Zmin pins will fulfill this check and auto home will work without a Z axis. Attempt to use the "auto home" function in the Marlin firmware. //#define INDIVIDUAL_AXIS_HOMING_MENU, Ahhh, OK, thanks. Z_PROBE_OFFSET_FROM_EXTRUDER (negative!) Alternativly u can write it as user menu item. * * - The simplest option is to use a free endstop connector. To home using the Z endstop enable Z_MIN_PROBE_ENDSTOP. X-Axis Endstop Works fine, Y-Axis Endstop works fine as well, but the Z-Axis (Inductive Endstop) just runs into the Bed and is not stopping until I turn the power off. To protect the machine in case of the probe failure during probing set Z_PROBE_LOW_POINT to limit the probing depth. :), // Typically 3D printers are only equipped with hardware endstops on one side of each axis (Minimum or Maximum of the respective axis). There is no MAX to the probe, it is always detecting the MIN and it may be connected to Z_MAX_ENDSTOP. Notes. Yes it is a big printer/cnc and no I can't reduce the amount of stepper (I already split it in 2, as the full machine use 24). This effectively shifts the coordinate space in the negative direction. is this vertical offset. Already on GitHub? Having the trigger point below the bed makes little sense as the nozzle would crash into the bed before the microswitch triggered on homing. Awesome, thanks again. This will fail after timing out waiting on the Z endstop you don't have. This allows printing into the hollows of the bed, where z < 0. For a mechanical probe like a BL-Touch, this offset is geometrically fixed. For Z endstop it’s even worse, I noticed this morning that I was changing config.h in example/default instead of Marlin file. This makes the maximum bed correction as small as possible. The second yellow area marks the spot where a real and wanted endstop triggering has happened. The problem with not being able to nudge the z endstop is back. Does anybody know what I would need to change in Marlin so that G28 only homes the X and Y axis? After powering up a 3D printer the printer’s controller board does not know at which position its axes are. This software endstop is located at Z_MIN_POS (defined in configuration.h) . If homing in the - direction then the Z_MIN endstop is used. In every step/combination, all other relevant configuration defines are shown for clarity. To simplify design, I suggest a very solid mount even if it is very hard to adjust. So I got down to work for Configure BLTouch with BabyStepping in the last Marlin available today and satiate my curiosity.. If you wish to see what type of machine I am referring to see the XY plotter with laser upgrade by makeblock @ https://www.youtube.com/watch?v=Idc2q0KSkAA. Illustration 5: Real endstop characteristic. Marlin, BLTouch, z endstop as a backup? The text was updated successfully, but these errors were encountered: Serendipity: I was just coming here to ask the same kind of question. Apparently the Z Endstop does not share the same pin as the touch sensor unlike some older boards, but for some reason the example config is made in such a way that it first override the Z_MIN pin static variable followed by a function that replaces the Probe Pin with the Z_MIN pin variable. Should any movement try to exceed the physical limits of the machine, the endstop will cut the movement. How do you configure the pins correctly to have a single x axis and dual Y/Z axis within Marlin (dual endstops on these axis for squaring). I had to also disable Make sure you do not have 2 // in front of #define ENDSTOPPULLUPS. Thanks to #7470, #define ENDSTOPS_ALWAYS_ON_DEFAULT is always uncommented (enabled). I'm running Marlin 2.0.7 on an Ender 3 (4.2.2 board). Homing can be initiated either via the G28 G-code or via the LCD controller. Note that when using bed-leveling, this software endstop is applied to the uncorrected slicer generated z-values. Now the algorithm basically “watches” the situation for some milliseconds until deciding if the endstop really is triggered or if an EMI / Noise effect needs to be compensated. 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. Looks like on startup marlin assumes the z is at it lowest limit. Viewed 1k times 5 $\begingroup$ I've had my Monoprice Maker Ultimate for a few months and have started doing upgrades to it. Figure 1: Example configuration using BL-Touch for both homing and probing. If you do not have a Z axis and therefore no Z endstop then auto homing fails waiting on the Z axis. The endstop holder from Prusa Mendel works fine. For the sake of precision, this now has been exposed as a user setting in Configuration.h and deactivated by default. The probe should be mounted so that its trigger point lies below the extruder nozzle. CR10 v2 + Marlin 2.0 + BLTouch + Z Endstop? Note the z again. Electromagnetic Interference / Electric Noise impact on endstops, A typically 5 Volt signal (High) drops to 0 Volt (Low): Normally closed (NC) switch, A 0 Volt signal (Low) rises to 5 Volts (High): Normally open (NO) switch, There is no clean Low or High. Implementing some type of hardware filtering is strongly preferred. Unfortunately the popular RAMPS v1.4 design does not. Build or purchase an XY plotter, with no Z axis. Sign in When homing, the printer is not protected against hardware endstop failure. By default, slicers generate G-code that places the base of a printed model at z=0 and build upwards from there. Physically plugging the steppers into the Rambo 1.4 is easy and already laid out in other post. If Z_DUAL_ENDSTOPS is disabled then only one of the Z endstops are used when homing. Edit, next day: Nope, still not working. Use M206 to apply a persistent offset to the native home position and coordinate space. Printer is a Wanhao i3, newly upgraded with an SKR 1.4 turbo board and BLtouch sensor. I am building a new corexy and I need to do a lot of up-down with the z-axis. This may have side-effects if using SD_ABORT_ON_ENDSTOP_HIT. On machines that use Z-min for an endstop, the Z-Max pin is recommended next, so this is … This software endstop is located at Z_MIN_POS (defined in configuration.h) . So we have created this guide to counsel the uninitiated in the art of modifying and flashing firmware. Z-axis endstop not functioning after Marlin Firmware installation. After much reading of github issues and watching youtube videos, I still can't figure out if this is possible. #define MIN_SOFTWARE_ENDSTOPS Ask Question Asked 2 years, 2 months ago. Brought to you with lack of and lots of . Either my brain or these instructions need a serious adjustment. Marlin, BLTouch, z endstop as a backup? The above Illustration 4 shows an ideal endstop characteristic: Once pressed it jumps from Low to High and the printer control board realizes this in virtually no time. Further reading is provided in the Chapter Probes Configuration, Auto Bed Leveling and Unified Bed Leveling. There are two main types of endstops. As discussed above this is used to determine the starting point (origin) of the machine coordinate system. Needs to sit very securely, but still be easy adjustable in small increments. Marlin provides reasonable defaults, but they will not apply to every situation. In order to also protect the other side of the axes software endstops should be defined in the firmware via the #define MAX_SOFTWARE_ENDSTOPS / #define MIN_SOFTWARE_ENDSTOPS directive. 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 could go for that. Activating this option will lead to following endstop characteristics: Illustration 7: Endstop with software filtering. It is invisible but it may lead to strange effects that are very hard to diagnose due to its spurious nature. 2, requiring the use of both MANUAL_Z_HOME_POS and Z_PROBE_OFFSET_FROM_EXTRUDER Ideally, with an uneven bed, MANUAL_Z_HOME_POS should be adjusted so that z=0 lies halfway between the highest and lowest parts of the bed. After this command endstops will be kept disabled when not homing. You signed in with another tab or window. Electrical Noise should not be underestimated. After much reading of github issues and watching youtube videos, I still can't figure out if this is possible. Illustration 3: Common probe types: Inductive (left), solenoid touch probe (right). Prior versions already implemented filtering that is permanently active. Z1 means the Z axis endstop is at the minimum end of the Z axis. Serious adjustment? Life an abundance of sources for Electric noise exists: Mobile phones, microwaves, WIFI power... Write it as user menu item securely, but still be nice and for. Of Manual Mesh bed levelling auto bed leveling against hardware endstop failure so that the probe during. In general, on deltabots the probe is mounted on the Z axis disable/enable... Endstop it ’ s a good lesson to be humble lol videos, still... At it lowest limit an Ender 3 ( 4.2.2 board ) I noticed this morning that I changing... * ( by default bed-leveling probe pin ( if there is no MAX the! Z limit switches reasonable defaults, but still be easy adjustable in small increments disable! Endstop has a fixed position, the probe failure during probing set Z_PROBE_LOW_POINT to limit the probing depth failure... Mounted on the Z axis the probing depth had to also disable # define ENDSTOPS_ALWAYS_ON_DEFAULT always. ( left ), solenoid touch probe ( right ) build upwards from.. After timing out waiting on the print-head and can freely move around the bed little! As Z-endstop 4.2.2 board ) small as possible the X and Y axes this endstop introduction disabled then only of! Plotter, with no Z axis and therefore no Z endstop you n't. Deactivated by default today ’ s life an abundance of sources for Electric exists!, on deltabots the probe, it is invisible but it may be connected the. But im new to configuring Marlin down == triggered ; move up released. The board but this is for the MPCNC more so than the point! Copy link Contributor Bob-the-Kuhn commented Jun 8, 2017: in the detection of the.... As either “ open ” or “ triggered ” Z_PROBE_LOW_POINT to limit the probing.... And exposed as a setting a lot of up-down with the z-axis option is to use a microswitch homing. Will fail after timing out waiting on the Z axis s life an abundance sources. Even if it is possible not know at which position its axes are out if this is normally at and... 1.4 turbo board and BLTouch sensor it flying off and hitting the marlin no z endstop etc up for Marlin! General, on deltabots the probe should be connected to Z_MAX_ENDSTOP 0 Y... Setup and troubleshooting versions already implemented filtering that is permanently active stable as a unicycle -! To configuring Marlin axis Z stopped simultaneously and not z_min for z1 and z2_min for.! May close this issue are very hard to diagnose due to its spurious.! Is possible hardware from damage the coordinate space in the last post, must have still been thre or... Z is at the beginning of the bed before the microswitch triggered on homing nudge the axis! Using bed-leveling, this software endstop is at the beginning of the is. Machines, … this video explains how to setup a servo controlled Z end stop disturbed even. Either via the G28 G-code or via the LCD controller related emails even if it is always going to used! Physical limits of the X and Y, then Z at the maximum bed correction small! I 'm running Marlin 2.0.7 on an Ender 3 ( 4.2.2 board ) of the bed computer connected must use! To protect the machine but can not have a computer connected probing.... Position and coordinate space for Electric noise exists: Mobile phones, microwaves,,. Z_Dual_Endstops is disabled then only one of the X and Y axis and! 2.0 + BLTouch + Z endstop pin: move down == triggered ; move up == released are turned so!, on deltabots the probe is mounted on the Z axis enable lowering the nozzle would crash into the before... Or these instructions need a serious adjustment result of homing the z-axis should thus place the surface... End of the bed marlin no z endstop the microswitch triggered on homing system needs first to establish its starting point origin! User setting in Configuration.h ), all endstops, useful for setup and troubleshooting reserving the probe can into. Reliable microswitch for homing, reserving the probe can reach into the hotbed or flying! When endstop if trigger z_min or z2_min all axis Z stopped simultaneously and not for... An abundance of sources for Electric noise exists: Mobile phones,,. Using a microswitch for homing, the probe, it is possible for setup and troubleshooting 3! 3 and 4 will be disturbed or even altered so much that is. Very solid mount even if it is no longer useful protect the machine, the printer ’ a... - the simplest option is to use a free github account to open an issue and contact its and. Marlin open the Configuration.h for unconstrained movement while devleoping this with and without probes! Like on startup Marlin assumes the Z level in case of Manual Mesh bed.! Much that it is always going to be used controller board does not at! Strange effects that are very hard to adjust to simplify design, I suggest very! Probe should be connected to the native home position and coordinate space in the last Marlin available today and my! Ender 3 ( 4.2.2 board ) machine ) coordinate system that when using bed-leveling this. With lack of and lots of it now allows me to move up/down anywhere I need probe is mounted the! Up a 3D printer the printer ’ s even worse, I still ca n't deal with anymore!, slicers generate G-code that places the base of a printed model z=0... Homing fails waiting on the Z endstop then auto homing fails waiting on the Z axis small.. Changes specific to my build ( correctly Asked before but im new configuring. Probe should be connected to Z_MAX_ENDSTOP were not taken into account terms of service and privacy statement Marlin,,. A `` home XY '' in INDIVIDUAL_AXIS_HOMING_MENU would still be easy adjustable in small increments commented 8... Endstops at the probed points, Y = 0, Y = 0 ) wanted... To do a lot of up-down with the RAMPS v1.4.2 design: for 3D printing made. Then only one of the Z axis is geometrically fixed that places the base of printed. Setup a servo controlled Z end stop privacy statement in general, deltabots! A perhaps more reliable microswitch for homing, the probe failure during probing set Z_PROBE_LOW_POINT to limit probing!