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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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[BUG] Dual Z Stepper with dual endstop don't work #27014

Open 891paul opened 3 weeks ago

891paul commented 3 weeks ago

Did you test the latest bugfix-2.1.x code?

Yes, and the problem still exists.

Bug Description

Hello, I have configured Marlin 2.1.2.2. With 2 Z stepper motors and 2 endstops.

The steppers drive manually, but the homing function only works in X and Y. Nothing happens when homing Z.

The endstops respond with M119.

If you move the Z axis manually and press one of the two Z endstops, both steppers stop. But only one stepper should remain standing.

The problem can be found more often on the Internet.

Bug Timeline

Marlin 2.1.2.2

Expected behavior

Each stepper should stop with the corresponding limit switch and the homing function in Z and the homing function of all 3 axes should work

Actual behavior

Z Homing is not possible. When you press a Z endstop, both steppers stop

Steps to Reproduce

No response

Version of Marlin Firmware

2.1.2.2

Printer model

No response

Electronics

BTT SKR V1.3

LCD/Controller

BTT TFT 35

Other add-ons

No response

Bed Leveling

MBL Manual Bed Leveling

Your Slicer

Prusa Slicer

Host Software

OctoPrint

Don't forget to include

Additional information & file uploads

Config.zip

thisiskeithb commented 3 weeks ago

Please download bugfix-2.1.x to test with the latest code and let us know if you're still having this issue.

arades79 commented 3 weeks ago

Same problem exists for dual Y (and probably dual X).

Odd since this was working in the last release, and there's no obvious changes in the code around these.

Also odd since the firmware thinks it's moving the axes the whole time.

After doing some debugging, seems like the issue is any time 'setseparate?_axis(true)' is active.

Ill see about fixing it this week and submit any fixes I find

ellensp commented 3 weeks ago

2.1.2.2 is very buggy and should not be used. List of known 2.1.2.2 bugs and fixes https://github.com/MarlinFirmware/Marlin/issues?q=is%3Aissue+2.1.2.2+in%3Atitle+label%3A%22Bug%3A+Confirmed+!%22+

891paul commented 3 weeks ago

I need a stable version. Which one would you recommend?

classicrocker883 commented 3 weeks ago

isnt there an option to enable for dual Z stepper endstops, like G34? because doesn't the I3 use this to level the gantry? https://marlinfw.org/docs/gcode/G034-zsaa.html

mouse2233 commented 2 weeks ago

The bug (on my board) is still active. After the suggested fixes, the behavior did not change on my Octopus PRO board. bugfix-2.1.x (03.05.2024) did not affect the printer behavior.

stklcode commented 1 week ago

Same here on Anycubic i3 Mega P.

2.1.2.1
works fine

2.1.2.2
wrong Z stepping (manual movement is doubled), G28 blocks Z axes and does not move

2.1.x with all proposed fixes applied (pending PRs)
manual movement is fine again, Z homing still blocks

bugfix-2.1.x
works fine (answer updated, did not work in previous tests)

ellensp commented 1 week ago

@stklcode

with all proposed fixes applied

What proposed fixes are you referring to?

And please provide your bugfix configs if you also have this issue under bugfix

stklcode commented 1 week ago

What proposed fixes are you referring to?

All currently open PRs für 2.1.x

27020 #27021 #27022 #27023 #27024 #27025 #27026

ellensp commented 1 week ago

All currently open PRs für 2.1.x #27020 #27021 #27022 #27023 #27024 #27025 #27026

Those are not for bugfix Those are fixes for broken 2.1.2.2. ie Marln 2.1.x, not bugfix 2.1.x Use bugfix code unmodified

stklcode commented 1 week ago

Those are not for bugfix

I know. As I wrote before: "2.1.x with all proposed fixes applied" (not "bugfix-").

ellensp commented 1 week ago

It was unclear, before you edited it.

stklcode commented 1 week ago

Yep, sorry for the confusion.

Just re-tested my configuration and extracted the actual target (Anycubic i3 Mega P with BLTouch and case light - guess the latter is not of any relevance here :wink:) on top of the current bugfix-2.1.x branch (eb781afe7b01d510b58abc4f83b767ecc61d6b84).

=> bugfix-2.1.x works :heavy_check_mark: (just had a minor config bug with the endstops) => 2.1.x still broken :x:

Configs attached:

Console outputs with DEBUG_LEVELING_FEATURE enabled and M111 S32 (on the broken 2.1.x branch)

Home X (G28 X) Lifts Z axis, and homes X. So far acting normally.

console output ``` Send: G28 X Recv: >>> G28 X2.00 Y2.00 Z0.00 Recv: Machine Type: Cartesian Recv: Probe: BLTOUCH Recv: Probe Offset X-2.00 Y-25.00 Z-0.40 (Left-Front & Below Nozzle) Recv: Auto Bed Leveling: BILINEAR (disabled) Recv: Recv: >>> set_bed_leveling_enabled X2.00 Y2.00 Z0.00 Recv: <<< set_bed_leveling_enabled X2.00 Y2.00 Z0.00 Recv: Raise Z before homing: Recv: do_blocking_move_to_z(5.00, 10.00) Recv: >>> do_blocking_move_to X2.00 Y2.00 Z0.00 Recv: > X2.00 Y2.00 Z5.00 Recv: <<< do_blocking_move_to X2.00 Y2.00 Z5.00 Recv: BLTouch from 90 to 160 Recv: BLTouch from 160 to 90 Recv: >>> homeaxis(X) Recv: Home Fast: -337.50mm Recv: >>> do_homing_move X2.00 Y2.00 Z5.00 Recv: ...(X, -337.50, [50.00]) [...] Recv: <<< do_homing_move X2.00 Y2.00 Z5.00 Recv: Move Away: 5.00mm Recv: >>> do_homing_move X2.00 Y2.00 Z5.00 Recv: ...(X, 5.00, [50.00]) Recv: <<< do_homing_move X2.00 Y2.00 Z5.00 Recv: Re-bump: -10.00mm Recv: >>> do_homing_move X2.00 Y2.00 Z5.00 Recv: ...(X, -10.00, 25.00) Recv: <<< do_homing_move X2.00 Y2.00 Z5.00 Recv: >>> set_axis_is_at_home(X) Recv: Axis X home_offset = 0.00 position_shift = 0.00 Recv: > home_offset[X] = 0.00 Recv: current_position= X0.00 Y2.00 Z5.00 : Recv: <<< set_axis_is_at_home(X) Recv: current_position= X0.00 Y2.00 Z5.00 : sync_plan_position Recv: current_position= X0.00 Y2.00 Z5.00 : > AFTER set_axis_is_at_home Recv: <<< homeaxis(X) Recv: current_position= X2.00 Y2.00 Z5.00 : sync_plan_position Recv: X:2.00 Y:2.00 Z:5.00 E:0.00 Count X:0 Y:160 Z:2000 Recv: <<< G28 X2.00 Y2.00 Z5.00 Recv: ok ```

Home Y (G28 Y) The same as for X, works as expected.

Home Z (G28 Z)

Absolutely no movement on any Z stepper at all. Neither before nor after endstop push.

console output ``` Send: G28 Z Recv: >>> G28 X2.00 Y2.00 Z5.00 Recv: Machine Type: Cartesian Recv: Probe: BLTOUCH Recv: Probe Offset X-2.00 Y-25.00 Z-0.40 (Left-Front & Below Nozzle) Recv: Auto Bed Leveling: BILINEAR (disabled) Recv: Recv: >>> set_bed_leveling_enabled X2.00 Y2.00 Z5.00 Recv: <<< set_bed_leveling_enabled X2.00 Y2.00 Z5.00 Recv: >>> homeaxis(Z) Recv: Home Fast: -315.00mm Recv: >>> do_homing_move X2.00 Y2.00 Z5.00 Recv: ...(Z, -315.00, [4.00]) (no movement, just "busy: procwessing" messages) (maually push Z endstops here) Recv: <<< do_homing_move X2.00 Y2.00 Z5.00 Recv: Move Away: 2.00mm Recv: >>> do_homing_move X2.00 Y2.00 Z5.00 Recv: ...(Z, 2.00, [4.00]) Recv: <<< do_homing_move X2.00 Y2.00 Z5.00 Recv: Re-bump: -4.00mm Recv: >>> do_homing_move X2.00 Y2.00 Z5.00 Recv: ...(Z, -4.00, 1.00) Recv: <<< do_homing_move X2.00 Y2.00 Z5.00 Recv: >>> set_axis_is_at_home(Z) Recv: *** Z HOMED TO ENDSTOP *** Recv: Axis Z home_offset = 0.00 position_shift = 0.00 Recv: > home_offset[Z] = 0.00 Recv: current_position= X2.00 Y2.00 Z0.00 : Recv: <<< set_axis_is_at_home(Z) Recv: current_position= X2.00 Y2.00 Z0.00 : sync_plan_position Recv: current_position= X2.00 Y2.00 Z0.00 : > AFTER set_axis_is_at_home Recv: <<< homeaxis(Z) Recv: >>> move_z_after_homing X2.00 Y2.00 Z0.00 Recv: >>> move_z_after_probing X2.00 Y2.00 Z0.00 Recv: <<< move_z_after_probing X2.00 Y2.00 Z0.00 Recv: <<< move_z_after_homing X2.00 Y2.00 Z0.00 Recv: current_position= X2.00 Y2.00 Z0.00 : sync_plan_position Recv: X:2.00 Y:2.00 Z:0.00 E:0.00 Count X:160 Y:160 Z:0 Recv: <<< G28 X2.00 Y2.00 Z0.00 Recv: ok Send: M113 S2 Recv: ok ```

Endstop detection with M119 looks okay.

condition z_min z2_min z_probe
no endstop pushed open open triggered
left Z endstop pushed triggered open triggered
right Z endstop pushed open triggered triggered
both Z endstops pushed triggered triggered triggered