Bed tilt in printing after performing screws_tilt_adjust | Mainsail | Page 1

quick flare Sep 28, 2025, 7:20 AM

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After performing screws_tilt_adjust and making mesh which showed that the bed is considerably flat, during printing it turns out that the right edge of the table is lowered by more than 0.2 mm. To be able to print, it is necessary to adjust the front and rear right adjustment screws to obtain the correct Z offset. While printing is possible, the whole situation is strange and disturbing. Especially since I can't understand why the printer is behaving this way. I recently switched to a Klipper, and perhaps I'm overlooking something.
#NoLogsNeeded

boreal elm Sep 28, 2025, 8:44 AM

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perhaps I'm overlooking something
And that's why it's always a good idea to send a log 🙈

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during printing it turns out that the right edge of the table is lowered by more than 0.2 mm
You mean bed? Or do you mean your actual table the printer stands on?

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It would be also good to know, what kind of printer this is

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Maybe a moving gantry and your gantry leveling is off? We know nothing without a log or without you telling us. That's why a log can always be helpful, as we can basically read your setup from it

quick flare Sep 28, 2025, 10:25 AM

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Sorry for lack of info... This is Ender 3v2, and as table I mean bed. As for gantry skewing - i understand, so leveling bed with screws_tilt_adjust makes bed parallel to gantry, since this test is performed by bltouch attached to the extruder. So where does the physical bed tilt to the right come from? It seems that bltouch is not measuring correctly across the entire width of the bed.

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Wchich log should I attach?

boreal elm Sep 28, 2025, 12:09 PM

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so leveling bed with screws_tilt_adjust makes bed parallel to gantry
Not necessarily. It should make it parallel to the toolhead trajectory. If your toolhead gantry is slightly off, and your toolhead is slightly rotated too, then it could result in some weird results

boreal elm Sep 28, 2025, 12:10 PM

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quick flare Wchich log should I attach?

klippy.log

quick flare Sep 28, 2025, 12:21 PM

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There you are.

📎 klippy.log

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Yes, you may be right... I have installed linear riles on gantry, maybe I should check it.

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Although before switching to Klipper there were no problems

boreal elm Sep 28, 2025, 12:54 PM

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Did you install the linear rails before or after Klipper?

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Btw, if you do multiple screw tilt adjust after each other, you don't need to change anything anymore after the second one?

quick flare Sep 28, 2025, 1:24 PM

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Linear rails installed before, but lastly made some regulations... Multiple tilt adjustments are repeatable

boreal elm Sep 28, 2025, 2:54 PM

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So they always the same, even after applying them?

quick flare Sep 28, 2025, 3:10 PM

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No, I mean so they are stable until I change tem. Every reading without changing gives the same readings. They do not change from reradinbg to reading

boreal elm Sep 28, 2025, 3:14 PM

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But if you follow the directions, they change and come closer to zero?

quick flare Sep 28, 2025, 3:52 PM

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Yes, I am gradually able to bring the readings to zero

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But despite it when I am starting to print, the bed is tilted down on right side about .2 mm

boreal elm Sep 28, 2025, 3:59 PM

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[gcode_macro PRINT_START]
gcode = 
    {% set BED_TEMP = params.BED_TEMP|default(60)|float %}
    {% set EXTRUDER_TEMP = params.EXTRUDER_TEMP|default(200)|float %}
    M190 S{BED_TEMP}
    G90
    G28
    
    BED_MESH_PROFILE LOAD=default
    
    M109 S{EXTRUDER_TEMP}
    M117 PRIME LINE
    G92 E0
    G1 Y-2 X10 Z0.28 F5000.0
    G1 Y-2 X160.0 Z0.28 F1000.0 E15
    G92 E0
    G1 Z2.0 F3000
    G1 Z0 F3000
    G1 Z0.2 F100```You always load the same mesh

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If you want a mesh specific for the print, you should use BED_MESH_CALIBRATE

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Or at least adjust the default mesh after you adjusted your bed tilt

quick flare Sep 28, 2025, 4:03 PM

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I allways load 'default' mesh, but i made new meshes fraquently. I delete old one and made new one with the same name ';default'.

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I think that loading the same mesh is not a problem if the bed surface does not change

boreal elm Sep 28, 2025, 4:06 PM

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quick flare I think that loading the same mesh is not a problem if the bed surface does not ...

It changes, if you adjust the screw

quick flare Sep 28, 2025, 4:06 PM

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Right, but after adjusting screws I always made new mesh

boreal elm Sep 28, 2025, 4:07 PM

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Ok, and you also saved it, before starting a new print?

quick flare Sep 28, 2025, 4:07 PM

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Yes, ofcourse

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I made it using Klipperscreen and touch display connected

boreal elm Sep 28, 2025, 4:08 PM

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quick flare Yes, ofcourse

Trust me, it's not that obvious for a lot of users

quick flare Sep 28, 2025, 4:08 PM

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Generally I am mostly using macros of Klipperscreen

boreal elm Sep 28, 2025, 4:08 PM

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I don't know them

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And auto saving is most likely not part of their macros

quick flare Sep 28, 2025, 4:09 PM

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Doing the same as mainsail macros

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But I am saving every time for sure

boreal elm Sep 28, 2025, 4:12 PM

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quick flare Doing the same as mainsail macros

I think you mean something different with macros. Mainsail has no macros. Just buttons executing macros.
This would be something you could call Mainsail macros, but Klipperscreen does not have such macros afaik: https://github.com/mainsail-crew/Mainsail-config

boreal elm Sep 28, 2025, 4:12 PM

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quick flare But I am saving every time for sure

So the 0.2mm you said, are just some estimation of you and not something you see in your bed mesh?

quick flare Sep 28, 2025, 4:17 PM

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Exactely. After bed leveling and making new mesh which shows quiite level bed when I am starting to print, it turns out that the right side of the bed is too low by about .2 mm. If I manually raise the front and back of the right side by that .2 mm, then the Z offset is correct and the filament sticks to the bed on the right side.

boreal elm Sep 28, 2025, 4:19 PM

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Then it sounds like a hardware issue (some rotations) resulting in incorrect measurement of that side of the bed

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Just try z offset calibration of the probe on both sides of the bed. You should see a difference then

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There is also a parameter to tune it

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I can't remember the name right now

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https://www.klipper3d.org/Axis_Twist_Compensation.html

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There it is

quick flare Sep 28, 2025, 4:22 PM

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Probabely you are riht. After our discussion I'm starting to suspect a problem with the x-axis linear rails. I'll have to check that out.

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Yes, I tried to make Z offset cal on the both sides and there was difference

boreal elm Sep 28, 2025, 4:23 PM

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quick flare Yes, I tried to make Z offset cal on the both sides and there was difference

Next time mention that first....

quick flare Sep 28, 2025, 4:24 PM

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Bah, i was not sure. For me , if you made leveling wth bl touch then gantry is parallel to bed

boreal elm Sep 28, 2025, 4:25 PM

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Yes you might think that, but don't forget the probe has an offset to your nozzle

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And we are working in 0.2mm steps. So just a small error can lead to "huge" problems

quick flare Sep 28, 2025, 4:26 PM

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Why in tis situation measuring level with bl touch did not reveal problem? Al least bl touch is connected with extruder which moves along the x axis

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And offset is constant on all bed

boreal elm Sep 28, 2025, 4:28 PM

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Al least bl tpouch is connected with extruder whcich which moves along the x axis
Yes, but if your x rail is not good, the offset to the nozzle changes along the axis

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If it's twisting, or not actually straight but bowed

quick flare Sep 28, 2025, 4:29 PM

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Anyway, now I acknowledge that the problem is probably hardware related

#Bed tilt in printing after performing screws_tilt_adjust