Use whatever EDIT: One thing to try that should rule out a homing sequence as a cause would be to set DISABLE_X or DISABLE_Y to true. In general a change in behavior like this has to be done as a new feature, disabled by default, so users see consistent behavior on the next update. Y homes to minimal Y-end stop. But, there is a way, that you can click the x-home or y-home buttons and those will home, but, the Marlin software prevents z homing if the probe is out of the bed area. what do you mean by grinding? I will go into as much detail as possible but please keep in mind that marlin is constantly being developed and changes can lead to a setting being named differently, a file being renamed and so on. Now the problem is with step 4. #define Z_SAFE_HOMING_Y_POINT ((Y_BED_SIZE) / 8)//((Y_BED_SIZE) / 2) Eryone also ups to feedrate to I think this is a fairly common configuration. #define SERVO_DEACTIVATION_DELAY 310, Thanks! I've always seen home as homing both X and Y axis at the same time. @thinkyhead With my setup in the XY home position the print head is located off to the side of the bed, and in the Z endstop trigger height the head is below the level of the bed surface. I would also porobably turn off the homing bump for a … I know it won't be that easy in practice, for example the specific homing sequence we use, and some other stuff. @thinkyhead I agree that with all types of delta printers around, things get complicated, and i can see an option that looks for a delta flag somewhere to choose the order of things as the order used now ruins a lot of beds and nozzles as well on xyz printers without a heated bed. Successfully merging a pull request may close this issue. currently homing behaves like: move x 10 home x move y 10 home y move z10 home z. this could be inproved by nesting the … Axis sequence. They have been used in conformance test- Thank you John Edited 1 time(s). Ok, so just to get that clear. Get the SourceForge newsletter. This means the system needs first to establish its starting point of the physical (machine) coordinate system, a process called Homing. In that case you can't move down. But perhaps that is not the case. If the homing speed is high, it might get a little bit of error, so it backs off a few mm and tries again at a slower speed. What is when you bed is on the maximum position? What interface separates x-home from y-home? And I assume your Z_HOME_DIR is -1… Hmm, so far the current Development code looks like it should at least try to call deploy_z_probe for homeaxis(Z_AXIS). Homing sequences are typically used as building blocks in testing problems with no reset. After detecting the home switch or home switch then index pulse (depending on configuation), and setting the coordinate of that point to HOME_OFFSET, LinuxCNC makes a move to HOME as the final step of the homing process. privacy statement. See also G26 Mesh Validation and G29 for UBL. However, when stepper motors timeout and power down, the z axis falls. 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). Your printer doesn't know the position until it's homed. This way both the x and y endstops can be moved to the body of the printer, and eliminates three pesky wires from the moving carriage, by shifting them to the body of the printer. The latest RC (RC2) addresses some of this. #endif 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 … But, there is a way, that you can click the x-home or y-home buttons and those will home, but, the Marlin software prevents z homing if the probe is out of the bed area. Follow with M420 S to turn leveling on, or use RESTORE_LEVELING_AFTER_G28 to automatically keep leveling on after G28. order you need. G28 disables bed leveling. Copy link If the stepper re-energizes and starts moving it’s more likely to be a software issue. (And the number of probe- and endstop-related settings is starting to become a bit messy and confusing.) #define Z_SAFE_HOMING_X_POINT ((X_BED_SIZE) / 8) //((X_BED_SIZE) / 2) // X point for Z homing when homing all axes (G28). It works ok when homing each axis individually, but several times now when given a home command it has continued driving Z homewards, right through the opto-endstop with enough force to break it in half. When you enable this by default we will crash a lot of working configurations. doing some mill type work with a sharpie, i noticed that the marlin 1.0.0 firmwar hase some issues with the order of things in homing. This sounds like its more of an issue with your user interface of choice, since @galexander1 mentioned a way to do it with Gcode. However, as @Wurstnase points out, Marlin won't allow any movement in the direction away from an endstop until that axis has been homed. #define DEACTIVATE_SERVOS_AFTER_MOVE if you rely on a probe as a min sensor, maybe a max sensor is handy. Put it in your slicer's G-code prologue. ; UBL Startup Guide. doing some mill type work with a sharpie, i noticed that the marlin 1.0.0 firmwar hase some issues with the order of things in homing. Here, a reset is a special input symbol that takes every input to the same state, i.e., it is a synchronizing sequence of length one. When using SENSORLESS_HOMING with TMC2209 drivers. However, instead of moving all axes away from the endstops before homing —which will lead to grinding in many cases— we should first home Z, then move Z away from the bed (if it's a min endstop), and then home XY last. Reply Quote. The unused extruder driver/s are used for the extra stepper/s. I have updated my test branch, if you would like to see some extra logging of the issue: https://github.com/thinkyhead/Marlin/tree/debug_G29. this seems to work. You signed in with another tab or window. What is this about This post will give guidelines on how to flash your own marlin onto a Eryone Thinker S V2 (NOT the V1) or ER20 printer. I hope to sort out the correct conditions asap. The value of PROBE_OFFSET_FROM_EXTRUDER is set at -2 in Marlin configuration.h if it is set at something else take that into account in the formula below. M112 should then disable that stepper. A comprehensive LCD menu system for UBL is coming soon. I've not used Repetier ever, so I'm not 100% sure I want to dive into this yet, and just abandon Marlin. 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