Skew compensation in the Bambu X1C Firmware

Bambu Lab X1 Series Bambu Lab X1C
520

This should work with the A1 series as far as we know? (A1 Mini, to be specific)

521

Iā€™ve try it. On a 120mm diagonal model i mesure 119.75 and 200.05
After skew calibration, i mesure 119.9 and 119.95 without pla shrinkage calibration wich is close to perfect.
Thanks for the ingeneering job :blush:

522

I always wondered about the esteps myself coming from an old school cartesian. I err on the side of caution and prefer to just leave it to the single calibration button after all the years of manual calibrationā€¦ :smiley:

Though I have to say in defense of cubes, Iā€™ll always remember the accuracy given by cubes that were hollow! This allowed you to test for elephant foot, dimensional accuracy for esteps, artifacts, resonance, overhang, bed adhesion by ridge-depth, retraction accuracy from seam-blobs, top surface quality comparisonsā€¦ Iā€™m sure Iā€™m leaving something out. All at the cost of a hollow cube for filament consumption. Versus the massive bricks of comparative benchmarksā€¦ I think I might even have my first perfect hollow cube up on my shelf :smiley:

523

Do you know if the calibration survive power cycle now on p1s, without keeping the command in my start gcode for all print?

524

Hi iPrimeSE.

Thanks for your share and input.

I actually purchased the Calilantern version (with the Z-axis skew as well) but however, the spreadsheet and manual for the Calilantern does not include on how to input skew compensation on the Bambu printers (I understand the XZ and YZ skews are not supported for the Bambu printers but not even the XY). Does the web app / web spreadsheet includes the method on how to input the ā€˜Iā€™ value (XY skew compensation) for the Califlower Mk2 into the P1S firmware?

Thanks!

525

I appended the skew commands for my X1C to the Machine start G-code of the printer preset:

;===================Skew correction=============================
;M1005 P1 ;Enables skew compensation
;M1005 I-0.00042; Correction factor (in radians)
;M1005 P0 ;Disables skew compensation but retains stored value.
;M1005 I0 ;Resets correction to zero
;M1005 ; provides current settings in /tmp/syslog.log

I can simply remove the leading semi-colon to activate the command. The commands only need to be used once - the settings remain the same after a power off/on cycle.

M1005 with no parameter is not useful without X1Plus. I include it just as reminder for myself. I can use it with the X1Plus console to see the current correction in the log:

Apr 17 08:15:16 info forward[1418]: [MCU][BMC]M1005:M1005
Apr 17 08:15:16 info forward[1418]: [MCU][BMC]M1005:comp_enable = 1
Apr 17 08:15:16 info forward[1418]: [MCU][BMC]M1005:current XY_comp_ang = -0.00042

I would expect the other commands to work the same with a P1P/P1S.

1 Like
526

Hello.

Do i input the data in the three single green boxes with the letters next to them? on the right side you have more green boxes but when i enter measurementā€™s into them the radians value doesnā€™t change.

527

If anyone is interested the fleur de cali can instructions can be found here: https://github.com/dirtdigger/fleur_de_cali/issues/15