Neptune 4 Plus (Klipper) does not show SCV-V2 calibration model for cornering #287

New Issue

MrUnknownDE · 2026-04-05T16:19:34+02:00

MrUnknownDE commented

2026-04-05 16:19:34 +02:00

Originally created by @matthew-buglass on 3/17/2026

Is there an existing issue for this problem?

I have searched the existing issues

The only other possibly relate issue is https://github.com/OrcaSlicer/OrcaSlicer/issues/11839

OrcaSlicer Version

2.3.1

Operating System (OS)

Windows

OS Version

OS: Windows 11 25H2

Additional system information

OS Name Microsoft Windows 11 Home
Version 10.0.26200 Build 26200
System Type x64-based PC
Processor AMD Ryzen 9 3900X 12-Core Processor, 4276 Mhz, 12 Core(s), 24 Logical Processor(s)
Installed Physical Memory (RAM) 64.0 GB
Display Card NVIDIA GeForce RTX 3080 Ti

Printer

Neptune 4 Plus

How to reproduce

Select the Neptune 4 Plus as a printer
Select the cornering calibration: Calibration > Cornering > Junction Deviation (only option)
The SCV-V2 test is not an option in the menu.
- I assume that is the correct test for Klipper printers given the cornering calibration docs
Create a Fast Tower model with the default settings
Slice
When I examine the gcode of the sliced model, SQUARE_CORNER_VELOCITY only swaps back and forth between its normal values instead of progressively getting faster as the print progresses.

Actual results

Here is a snippet of the generated GCode (github wouldn't let me upload hte whole file):

; stop printing object fast_tower_test.stl id:0 copy 0
;LAYER_CHANGE
;Z:5.52
;HEIGHT:0.2
;BEFORE_LAYER_CHANGE
G92 E0
;5.52


EXCLUDE_OBJECT_END NAME=fast_tower_test.stl_id_0_copy_0
G1 Z5.320 F15000
;AFTER_LAYER_CHANGE
;5.52
;_SET_FAN_SPEED_CHANGING_LAYER
; printing object fast_tower_test.stl id:0 copy 0
SET_VELOCITY_LIMIT ACCEL=5000 ACCEL_TO_DECEL=2500 SQUARE_CORNER_VELOCITY=9
EXCLUDE_OBJECT_START NAME=fast_tower_test.stl_id_0_copy_0
SET_VELOCITY_LIMIT ACCEL=2000 ACCEL_TO_DECEL=1000 SQUARE_CORNER_VELOCITY=7
G1 F12000
G1 Z5.321 X150.289 Y179.929 E.01994
G1 Z5.338 X140.321 Y170.133 E.39008
G1 Z5.374 X140.061 Y140.417 E.8294
G1 Z5.386 X149.661 Y140.333 E.26793
G1 Z5.390 X149.687 Y143.333 E.08373
G1 Z5.392 X152.087 Y143.312 E.06698
G1 Z5.396 X152.061 Y140.312 E.08373
G1 Z5.409 X162.971 Y140.217 E.30452
G1 Z5.410 X162.976 Y140.717 E.01395
G1 Z5.413 X165.087 Y140.699 E.05894
G1 Z5.413 X165.083 Y140.199 E.01395
G1 Z5.431 X179.66 Y140.072 E.40686
G1 Z5.442 X179.737 Y148.968 E.2483
G1 Z5.443 X179.744 Y149.671 E.01963
G1 Z5.446 X176.744 Y149.697 E.08373
G1 Z5.449 X176.765 Y152.097 E.06698
G1 Z5.453 X179.764 Y152.071 E.08373
G1 Z5.466 X179.859 Y162.9 E.30225
G1 Z5.467 X179.359 Y162.904 E.01395
G1 Z5.470 X179.379 Y165.248 E.0654
G1 Z5.470 X179.879 Y165.243 E.01395
G1 Z5.479 X179.94 Y172.401 E.19979
G1 Z5.480 X179.923 Y173.356 E.02664
G1 Z5.481 X179.871 Y174.076 E.02014
G1 Z5.482 X179.744 Y174.959 E.02492
G1 Z5.483 X179.559 Y175.725 E.02198
G1 Z5.484 X179.302 Y176.441 E.02124
G1 Z5.485 X178.995 Y177.057 E.01921
G1 Z5.486 X178.62 Y177.612 E.01868
G1 Z5.486 X178.197 Y178.079 E.01762
G1 Z5.487 X177.7 Y178.492 E.01802
G1 Z5.488 X177.12 Y178.851 E.01905
G1 Z5.489 X176.73 Y179.039 E.01208
G1 Z5.489 X176.329 Y179.199 E.01204
G1 Z5.490 X175.93 Y179.33 E.01173
G1 Z5.490 X175.474 Y179.45 E.01315
G1 Z5.491 X175.029 Y179.542 E.01268
G1 Z5.491 X174.516 Y179.62 E.01449
G1 Z5.493 X173.395 Y179.713 E.0314
G1 Z5.494 X172.279 Y179.738 E.03116
G1 Z5.520 X151.004 Y179.923 E.59381
; stop printing object fast_tower_test.stl id:0 copy 0
;LAYER_CHANGE
;Z:5.72
;HEIGHT:0.2
;BEFORE_LAYER_CHANGE
G92 E0
;5.72


EXCLUDE_OBJECT_END NAME=fast_tower_test.stl_id_0_copy_0
G1 Z5.520 F15000
;AFTER_LAYER_CHANGE
;5.72
;_SET_FAN_SPEED_CHANGING_LAYER
; printing object fast_tower_test.stl id:0 copy 0
SET_VELOCITY_LIMIT ACCEL=5000 ACCEL_TO_DECEL=2500 SQUARE_CORNER_VELOCITY=9
EXCLUDE_OBJECT_START NAME=fast_tower_test.stl_id_0_copy_0
SET_VELOCITY_LIMIT ACCEL=2000 ACCEL_TO_DECEL=1000 SQUARE_CORNER_VELOCITY=7
G1 F12000
G1 Z5.521 X150.289 Y179.929 E.01994
G1 Z5.538 X140.321 Y170.133 E.39008
G1 Z5.574 X140.061 Y140.417 E.8294
G1 Z5.586 X149.661 Y140.333 E.26793
G1 Z5.590 X149.687 Y143.333 E.08373
G1 Z5.592 X152.087 Y143.312 E.06698
G1 Z5.596 X152.061 Y140.312 E.08373
G1 Z5.609 X162.849 Y140.218 E.30111
G1 Z5.610 X162.853 Y140.718 E.01395
G1 Z5.611 X164.072 Y140.708 E.03403
G1 Z5.613 X165.209 Y140.698 E.03173
G1 Z5.613 X165.205 Y140.198 E.01395
G1 Z5.631 X179.66 Y140.072 E.40345
G1 Z5.642 X179.737 Y148.935 E.24737
G1 Z5.643 X179.744 Y149.671 E.02056
G1 Z5.646 X176.744 Y149.697 E.08373
G1 Z5.649 X176.765 Y152.097 E.06698
G1 Z5.653 X179.764 Y152.071 E.08373
G1 Z5.666 X179.858 Y162.775 E.29876
G1 Z5.667 X179.358 Y162.779 E.01395
G1 Z5.670 X179.381 Y165.373 E.07239
G1 Z5.670 X179.88 Y165.369 E.01395
G1 Z5.679 X179.94 Y172.401 E.19629
G1 Z5.680 X179.923 Y173.356 E.02663
G1 Z5.681 X179.871 Y174.076 E.02015
G1 Z5.682 X179.744 Y174.959 E.02492
G1 Z5.683 X179.559 Y175.725 E.02198
G1 Z5.684 X179.302 Y176.441 E.02124
G1 Z5.685 X178.995 Y177.057 E.01921
G1 Z5.686 X178.62 Y177.612 E.01867
G1 Z5.686 X178.197 Y178.079 E.01762
G1 Z5.687 X177.7 Y178.492 E.01802
G1 Z5.688 X177.12 Y178.851 E.01904
G1 Z5.689 X176.73 Y179.039 E.01209
G1 Z5.689 X176.329 Y179.199 E.01204
G1 Z5.690 X175.93 Y179.33 E.01173
G1 Z5.690 X175.474 Y179.45 E.01315
G1 Z5.691 X175.029 Y179.542 E.01268
G1 Z5.691 X174.516 Y179.62 E.01448
G1 Z5.693 X173.395 Y179.713 E.0314
G1 Z5.694 X172.279 Y179.738 E.03116
G1 Z5.720 X151.004 Y179.923 E.59381
; stop printing object fast_tower_test.stl id:0 copy 0
;LAYER_CHANGE
;Z:5.92
;HEIGHT:0.2
;BEFORE_LAYER_CHANGE
G92 E0
;5.92


EXCLUDE_OBJECT_END NAME=fast_tower_test.stl_id_0_copy_0
G1 Z5.720 F15000
;AFTER_LAYER_CHANGE
;5.92
;_SET_FAN_SPEED_CHANGING_LAYER
; printing object fast_tower_test.stl id:0 copy 0
SET_VELOCITY_LIMIT ACCEL=5000 ACCEL_TO_DECEL=2500 SQUARE_CORNER_VELOCITY=9
EXCLUDE_OBJECT_START NAME=fast_tower_test.stl_id_0_copy_0
SET_VELOCITY_LIMIT ACCEL=2000 ACCEL_TO_DECEL=1000 SQUARE_CORNER_VELOCITY=7

As you can see, SQUARE_CORNER_VELOCITY only changes back and forth between 9 and 7 across layers instead of increasing as the print goes on.

Expected results

I would expect that the SQUARE_CORNER_VELOCITY increases as we get higher in the model.

I am fairly certain that my problem is because I don't have access to the SCV-V2 test, which I assume is the one needed for Klipper Printers.

Project file & Debug log uploads

SCV-V2 Bug Report.zip

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @matthew-buglass on 3/17/2026* ### Is there an existing issue for this problem? - [x] I have searched the existing issues The only other possibly relate issue is https://github.com/OrcaSlicer/OrcaSlicer/issues/11839 ### OrcaSlicer Version 2.3.1 ### Operating System (OS) Windows ### OS Version OS: Windows 11 25H2 ### Additional system information OS Name Microsoft Windows 11 Home Version 10.0.26200 Build 26200 System Type x64-based PC Processor AMD Ryzen 9 3900X 12-Core Processor, 4276 Mhz, 12 Core(s), 24 Logical Processor(s) Installed Physical Memory (RAM) 64.0 GB Display Card NVIDIA GeForce RTX 3080 Ti ### Printer Neptune 4 Plus ### How to reproduce 1. Select the Neptune 4 Plus as a printer 2. Select the cornering calibration: Calibration > Cornering > Junction Deviation (only option) 3. The `SCV-V2` test is not an option in the menu. - I assume that is the correct test for Klipper printers given the [cornering calibration docs](https://github.com/OrcaSlicer/OrcaSlicer/wiki/cornering-calib#calibration) - <img width="1908" height="1039" alt="Image" src="https://github.com/user-attachments/assets/af931385-0aff-44f6-890d-f0f891dd05b5" /> 4. Create a Fast Tower model with the default settings 5. Slice 6. When I examine the gcode of the sliced model, `SQUARE_CORNER_VELOCITY` only swaps back and forth between its normal values instead of progressively getting faster as the print progresses. ### Actual results Here is a snippet of the generated GCode (github wouldn't let me upload hte whole file): ``` ; stop printing object fast_tower_test.stl id:0 copy 0 ;LAYER_CHANGE ;Z:5.52 ;HEIGHT:0.2 ;BEFORE_LAYER_CHANGE G92 E0 ;5.52 EXCLUDE_OBJECT_END NAME=fast_tower_test.stl_id_0_copy_0 G1 Z5.320 F15000 ;AFTER_LAYER_CHANGE ;5.52 ;_SET_FAN_SPEED_CHANGING_LAYER ; printing object fast_tower_test.stl id:0 copy 0 SET_VELOCITY_LIMIT ACCEL=5000 ACCEL_TO_DECEL=2500 SQUARE_CORNER_VELOCITY=9 EXCLUDE_OBJECT_START NAME=fast_tower_test.stl_id_0_copy_0 SET_VELOCITY_LIMIT ACCEL=2000 ACCEL_TO_DECEL=1000 SQUARE_CORNER_VELOCITY=7 G1 F12000 G1 Z5.321 X150.289 Y179.929 E.01994 G1 Z5.338 X140.321 Y170.133 E.39008 G1 Z5.374 X140.061 Y140.417 E.8294 G1 Z5.386 X149.661 Y140.333 E.26793 G1 Z5.390 X149.687 Y143.333 E.08373 G1 Z5.392 X152.087 Y143.312 E.06698 G1 Z5.396 X152.061 Y140.312 E.08373 G1 Z5.409 X162.971 Y140.217 E.30452 G1 Z5.410 X162.976 Y140.717 E.01395 G1 Z5.413 X165.087 Y140.699 E.05894 G1 Z5.413 X165.083 Y140.199 E.01395 G1 Z5.431 X179.66 Y140.072 E.40686 G1 Z5.442 X179.737 Y148.968 E.2483 G1 Z5.443 X179.744 Y149.671 E.01963 G1 Z5.446 X176.744 Y149.697 E.08373 G1 Z5.449 X176.765 Y152.097 E.06698 G1 Z5.453 X179.764 Y152.071 E.08373 G1 Z5.466 X179.859 Y162.9 E.30225 G1 Z5.467 X179.359 Y162.904 E.01395 G1 Z5.470 X179.379 Y165.248 E.0654 G1 Z5.470 X179.879 Y165.243 E.01395 G1 Z5.479 X179.94 Y172.401 E.19979 G1 Z5.480 X179.923 Y173.356 E.02664 G1 Z5.481 X179.871 Y174.076 E.02014 G1 Z5.482 X179.744 Y174.959 E.02492 G1 Z5.483 X179.559 Y175.725 E.02198 G1 Z5.484 X179.302 Y176.441 E.02124 G1 Z5.485 X178.995 Y177.057 E.01921 G1 Z5.486 X178.62 Y177.612 E.01868 G1 Z5.486 X178.197 Y178.079 E.01762 G1 Z5.487 X177.7 Y178.492 E.01802 G1 Z5.488 X177.12 Y178.851 E.01905 G1 Z5.489 X176.73 Y179.039 E.01208 G1 Z5.489 X176.329 Y179.199 E.01204 G1 Z5.490 X175.93 Y179.33 E.01173 G1 Z5.490 X175.474 Y179.45 E.01315 G1 Z5.491 X175.029 Y179.542 E.01268 G1 Z5.491 X174.516 Y179.62 E.01449 G1 Z5.493 X173.395 Y179.713 E.0314 G1 Z5.494 X172.279 Y179.738 E.03116 G1 Z5.520 X151.004 Y179.923 E.59381 ; stop printing object fast_tower_test.stl id:0 copy 0 ;LAYER_CHANGE ;Z:5.72 ;HEIGHT:0.2 ;BEFORE_LAYER_CHANGE G92 E0 ;5.72 EXCLUDE_OBJECT_END NAME=fast_tower_test.stl_id_0_copy_0 G1 Z5.520 F15000 ;AFTER_LAYER_CHANGE ;5.72 ;_SET_FAN_SPEED_CHANGING_LAYER ; printing object fast_tower_test.stl id:0 copy 0 SET_VELOCITY_LIMIT ACCEL=5000 ACCEL_TO_DECEL=2500 SQUARE_CORNER_VELOCITY=9 EXCLUDE_OBJECT_START NAME=fast_tower_test.stl_id_0_copy_0 SET_VELOCITY_LIMIT ACCEL=2000 ACCEL_TO_DECEL=1000 SQUARE_CORNER_VELOCITY=7 G1 F12000 G1 Z5.521 X150.289 Y179.929 E.01994 G1 Z5.538 X140.321 Y170.133 E.39008 G1 Z5.574 X140.061 Y140.417 E.8294 G1 Z5.586 X149.661 Y140.333 E.26793 G1 Z5.590 X149.687 Y143.333 E.08373 G1 Z5.592 X152.087 Y143.312 E.06698 G1 Z5.596 X152.061 Y140.312 E.08373 G1 Z5.609 X162.849 Y140.218 E.30111 G1 Z5.610 X162.853 Y140.718 E.01395 G1 Z5.611 X164.072 Y140.708 E.03403 G1 Z5.613 X165.209 Y140.698 E.03173 G1 Z5.613 X165.205 Y140.198 E.01395 G1 Z5.631 X179.66 Y140.072 E.40345 G1 Z5.642 X179.737 Y148.935 E.24737 G1 Z5.643 X179.744 Y149.671 E.02056 G1 Z5.646 X176.744 Y149.697 E.08373 G1 Z5.649 X176.765 Y152.097 E.06698 G1 Z5.653 X179.764 Y152.071 E.08373 G1 Z5.666 X179.858 Y162.775 E.29876 G1 Z5.667 X179.358 Y162.779 E.01395 G1 Z5.670 X179.381 Y165.373 E.07239 G1 Z5.670 X179.88 Y165.369 E.01395 G1 Z5.679 X179.94 Y172.401 E.19629 G1 Z5.680 X179.923 Y173.356 E.02663 G1 Z5.681 X179.871 Y174.076 E.02015 G1 Z5.682 X179.744 Y174.959 E.02492 G1 Z5.683 X179.559 Y175.725 E.02198 G1 Z5.684 X179.302 Y176.441 E.02124 G1 Z5.685 X178.995 Y177.057 E.01921 G1 Z5.686 X178.62 Y177.612 E.01867 G1 Z5.686 X178.197 Y178.079 E.01762 G1 Z5.687 X177.7 Y178.492 E.01802 G1 Z5.688 X177.12 Y178.851 E.01904 G1 Z5.689 X176.73 Y179.039 E.01209 G1 Z5.689 X176.329 Y179.199 E.01204 G1 Z5.690 X175.93 Y179.33 E.01173 G1 Z5.690 X175.474 Y179.45 E.01315 G1 Z5.691 X175.029 Y179.542 E.01268 G1 Z5.691 X174.516 Y179.62 E.01448 G1 Z5.693 X173.395 Y179.713 E.0314 G1 Z5.694 X172.279 Y179.738 E.03116 G1 Z5.720 X151.004 Y179.923 E.59381 ; stop printing object fast_tower_test.stl id:0 copy 0 ;LAYER_CHANGE ;Z:5.92 ;HEIGHT:0.2 ;BEFORE_LAYER_CHANGE G92 E0 ;5.92 EXCLUDE_OBJECT_END NAME=fast_tower_test.stl_id_0_copy_0 G1 Z5.720 F15000 ;AFTER_LAYER_CHANGE ;5.92 ;_SET_FAN_SPEED_CHANGING_LAYER ; printing object fast_tower_test.stl id:0 copy 0 SET_VELOCITY_LIMIT ACCEL=5000 ACCEL_TO_DECEL=2500 SQUARE_CORNER_VELOCITY=9 EXCLUDE_OBJECT_START NAME=fast_tower_test.stl_id_0_copy_0 SET_VELOCITY_LIMIT ACCEL=2000 ACCEL_TO_DECEL=1000 SQUARE_CORNER_VELOCITY=7 ``` As you can see, `SQUARE_CORNER_VELOCITY` only changes back and forth between 9 and 7 across layers instead of increasing as the print goes on. ### Expected results I would expect that the `SQUARE_CORNER_VELOCITY` increases as we get higher in the model. I am fairly certain that my problem is because I don't have access to the `SCV-V2` test, which I assume is the one needed for Klipper Printers. ### Project file & Debug log uploads [SCV-V2 Bug Report.zip](https://github.com/user-attachments/files/26056712/SCV-V2.Bug.Report.zip) ### Checklist of files to include - [ ] Log file - [x] Project file ### Anything else? _No response_

MrUnknownDE closed this issue

2026-04-05 16:19:34 +02:00

MrUnknownDE added the duplicate duplicate duplicate duplicate duplicate duplicate duplicate duplicate duplicate duplicate duplicate duplicate duplicate duplicate duplicate duplicate duplicate duplicate labels 2026-04-05 16:19:34 +02:00

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Reference: github/OrcaSlicer#287