Bug: 4-axis project: no move to X-origin when starting job in rotation mode

[brvdboss]

🐞 bug report

Affected Version(s)

Snapmaker Luban 4.1.4 (current stable, haven't tested earlier versions)

Is this a regression? (optional)

unknown to me

To Reproduce

1. Create a 4 axis project
2. add your stl file
3. create a toolpath in "rotation" mode
4. generate the gcode 7 preview
5. Export the Gcode to a file

Exception or Error (optional)

When running the job, there is no move to the x-code origin and the tool is cutting into the air on the left side of the bed. (I had set the work-origin previous to loading the job, but that shouldn't matter)

The start of the gcode looks like (skipping header)

;Header End

G90
G0 Z27.50 F1500
G0 Y1.54 B-269.83 F2400
G0 Z18.50 F1500
M3 P100
G1 Y1.54 Z17.00 B-269.83 F150
G1 B-269.43 F490
G1 B90.30
....

Expected behavior

(Assumption, you're starting from the home position) I would expect a G0 X0 F2400 move in there. As such:

;Header End

G90
G0 X0 F2400
G0 Y1.54 B-269.83 F2400
G0 Z27.50 F1500
G0 Z18.50 F1500
M3 P100
G1 Y1.54 Z17.00 B-269.83 F150
G1 B-269.43 F490
G1 B90.30
....

Additionally, I would assume the Y-move to happen before the Z-moves as well to have the least possible chance of having the tool running into the rotary module.

🌍 Your Environment

Platform:

• Operating System: Windows 11 x64
• Printer: Snapmaker A350 + rotary module