{"action":"created","issue":{"url":"https://api.github.com/repos/MarlinFirmware/MarlinDev/issues/292","labels_url":"https://api.github.com/repos/MarlinFirmware/MarlinDev/issues/292/labels{/name}","comments_url":"https://api.github.com/repos/MarlinFirmware/MarlinDev/issues/292/comments","events_url":"https://api.github.com/repos/MarlinFirmware/MarlinDev/issues/292/events","html_url":"https://github.com/MarlinFirmware/MarlinDev/issues/292","id":119349329,"number":292,"title":"enabled Auto-level makes entire printer move very slowly - before issueing G29 command","user":{"login":"dintid","id":4258031,"avatar_url":"https://avatars.githubusercontent.com/u/4258031?v=3","gravatar_id":"","url":"https://api.github.com/users/dintid","html_url":"https://github.com/dintid","followers_url":"https://api.github.com/users/dintid/followers","following_url":"https://api.github.com/users/dintid/following{/other_user}","gists_url":"https://api.github.com/users/dintid/gists{/gist_id}","starred_url":"https://api.github.com/users/dintid/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dintid/subscriptions","organizations_url":"https://api.github.com/users/dintid/orgs","repos_url":"https://api.github.com/users/dintid/repos","events_url":"https://api.github.com/users/dintid/events{/privacy}","received_events_url":"https://api.github.com/users/dintid/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2015-11-29T09:57:04Z","updated_at":"2015-12-03T18:47:22Z","closed_at":null,"body":"I posted the problem on RepRap Forums in the hope someone could help http://forums.reprap.org/read.php?146,586527\r\nSpent most of the time with people suggesting things to do without them having read my description..or hinted/Said I did something wrong.. Again without having read my description.\r\n\r\nHere is the entire issue copied from above place:\r\n\r\nI have Googled up and down, and searched on the forums and on Github Issues, and havn't found a similar thread, so I hope I'm not asking something that has allready been solved.\r\n\r\nPrinter configuration\r\n1. Printer type: UM2 clone type (my source) - I have made lots of changes, but that is not relevant for this issue.\r\n2. Controller: Arduino Mega 2560 R3 + Ramps 1.4 -- Modded to 24v\r\n3.IR-Sensor: I'm using DC42's mini IR Sensor for my Z-height sensor.\r\n4. Firmware: Release Candidate -- Marlin 1.1.0-RC2 - 29 September 2015\r\n5.My firmware: You can see my firmware here on dropbox - I have not setup Z-offset and other Things for printing, as I'm not that far yet.\r\n\r\nProblem\r\n1.When Auto-level is disabled everything Works fine.. printer moves fast around and homes as expected -> to the rear left. Can see video here [youtu.be]\r\n2.When Auto-level is enabled everythigng slows Down. I can still move it around and homing Works, but it is extremely slow. Especially when doing small moves (10mm) and especially on the X axis. Y axis is also very slow though. Can see video here: [youtu.be]\r\n3.The issue is very easy to see, but I have no idea how to solve it?\r\n\r\nWhat I've tried:\r\n1.I have tried enabling/disabling my Mini OLED display. It uses I2C and I thought it might cause problems. No change though.\r\n2.I have tried enabling/disabling EEPROM_SETTINGS. No change.\r\n3.I have tried enabling/disabling DISABLE_MAX_ENDSTOPS - this was listed in an old Github issue, but no change.\r\n4.I have tried enabling/disabling min/max-software_endstops - this was listed in an old Github issue, but no change.\r\n5.I have tried enabling/disabling ENDSTOPS_ONLY_FOR_HOMING - no change\r\n6.I have tried enabling/disabling Z_SAFE_HOMING - no change.\r\n7.Tried setting same HOMING_FEEDRATE as XY_TRAVEL_SPEED (speed between probes) - no change\r\n8.Tired upping Z DEFAULT_MAX_FEEDRATE from 45 to 300mm/sec to test for Z axis-movement limiation - no change\r\n\r\nThesis:\r\n Firmware is corrupt.\r\n Derived from the Issues on Github it seems a Z-auto-leve issue was introduced with the merging of the Delta printers in march/april 2015\r\n At best there is some \"hidden\" speed settings after using G29 which I just can't find in the firmware?\r\n\r\n I really hope someone has some idea, as I have no clue how to proceed!"},"comment":{"url":"https://api.github.com/repos/MarlinFirmware/MarlinDev/issues/comments/161744352","html_url":"https://github.com/MarlinFirmware/MarlinDev/issues/292#issuecomment-161744352","issue_url":"https://api.github.com/repos/MarlinFirmware/MarlinDev/issues/292","id":161744352,"user":{"login":"KiteLab","id":10833311,"avatar_url":"https://avatars.githubusercontent.com/u/10833311?v=3","gravatar_id":"","url":"https://api.github.com/users/KiteLab","html_url":"https://github.com/KiteLab","followers_url":"https://api.github.com/users/KiteLab/followers","following_url":"https://api.github.com/users/KiteLab/following{/other_user}","gists_url":"https://api.github.com/users/KiteLab/gists{/gist_id}","starred_url":"https://api.github.com/users/KiteLab/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/KiteLab/subscriptions","organizations_url":"https://api.github.com/users/KiteLab/orgs","repos_url":"https://api.github.com/users/KiteLab/repos","events_url":"https://api.github.com/users/KiteLab/events{/privacy}","received_events_url":"https://api.github.com/users/KiteLab/received_events","type":"User","site_admin":false},"created_at":"2015-12-03T18:47:22Z","updated_at":"2015-12-03T18:47:22Z","body":"The workhorse in Marlin, the stepper interrupt (https://github.com/MarlinFirmware/Marlin/blob/RC/Marlin/stepper.cpp#L601) cant handle more than one extruder (https://github.com/MarlinFirmware/Marlin/blob/RC/Marlin/stepper.cpp#L669) - for example. "}}