MarlinFirmware / Marlin

Marlin is an optimized firmware for RepRap 3D printers based on the Arduino platform. Many commercial 3D printers come with Marlin installed. Check with your vendor if you need source code for your specific machine.

https://marlinfw.org

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z-min endstop sense with piezo, after deactivated stepper G28, G29 errors. #12905

Closed njozsef closed 5 years ago

njozsef commented 5 years ago

Hi!

[Description] I use Marlin 1.1.9 bugfix and ender3 with piezo (underbed) from precisionpiezo.uk. if timed out steppers and disabled, G28 or G29 running error (printer halted) after z is when move down. Z-stepper big jerk first step, and big vibration after powered up.

I use #define DELAY_BEFORE_PROBING 200 //on Configuration.h

[reproducing] 1: power on 2: G28 or G29 (good, because unknown z, moving up z at 10mm to safe height ) 3: move Z at +30mm (move highest position than safe height) 4: wait steppers timed out or M84 5: G28 6: activate x and y steppers and moving 0,0 7: moving bed center xy and begins to observe z-min pin. 8: Big jerk az Z axis at first step down (powered up), piezo levelling fail-triggered z-min. Printer halted!!!

[suggestion] Activate all motors at the beginning before running G28 or G29.

Thank you Jozsef

njozsef commented 5 years ago

piezo underbed version on thingiverse: https://www.thingiverse.com/thing:3348684 when it works G29 video: https://www.youtube.com/watch?v=CjpgHudlJSM

boelle commented 5 years ago

@njozsef problem solved?

thinkyhead commented 5 years ago

(printer halted) after z is when move down.

Lower your Z acceleration, maximum speed, and Z jerk values. And/or reduce the micro-steps on your Z stepper driver to 16x or 8x. This should prevent the Z axis getting torqued to the point of sticking.

boelle commented 5 years ago

@thinkyhead i think we can close this one

njozsef commented 5 years ago

Hi. I understand, and accepted the lower acc and no jerk. But printer is working normally if motors not timed out. Error only after motors relased. After reconnect stepper H-bridge, high vibration generated. This is not related the acceleration and jerk.

Suggested solution is simple: all motors powered on (include z) before G28.

currently firmware only powered on x and y motors before running g28. After xy moved the min point, powered on the z drive.

Thank you. Jozsef

boelle commented 5 years ago

maybe attach your 2 config files as a zip file, it could tell @thinkyhead what could be the cause

njozsef commented 5 years ago

I solution (quick an dirty) Setting (Marlin v2.0) one param. true to false

define DISABLE_INACTIVE_Z false

Thank you. please close.

github-actions[bot] commented 4 years ago

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.