Ironing should default to an offset angle from the top surface infill direction. #2103

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MrUnknownDE · 2026-04-05T23:45:05+02:00

MrUnknownDE commented

2026-04-05 23:45:05 +02:00

Originally created by @ansonl on 9/22/2025

Is there an existing issue for this feature request?

I have searched the existing issues

The Ironing default angle behavior in OrcaSlicer is the same angle as the top surface angle. Ironing should be done at an angle offset from from the top surface lines angle as implemented correctly in other slicers.

PrusaSlicer uses a 45 degree angle offset for ironing https://help.prusa3d.com/article/ironing_177488
Cura uses a 90 degree angle offset for ironing.
Bambu Studio uses 45 degree offset as the default behavior from what I remember.

Which printers will be beneficial to this feature?

All

Describe the solution you'd like

Ironing default angle should be dynamic and be an offset angle from the top surface infill angle.

I think this may be done by modifying Fill.cpp https://github.com/SoftFever/OrcaSlicer/blame/main/src/libslic3r/Fill/Fill.cpp#L1547

from

 ironing_params.angle        = (config.ironing_angle >= 0 ? config.ironing_angle : config.infill_direction) * M_PI / 180.;

to

 ironing_params.angle        = (config.ironing_angle >= 0 ? config.ironing_angle : config.infill_direction + 90) * M_PI / 180.;

Describe alternatives you've considered

Specifying a specific ironing angle does not solve this issue because the top surface infill angle varies depending on which layer you are on so it is not possible to get ironing to always be at a 90 degree offset to the top surface with a fixed angle.

Additional context

No response

*Originally created by @ansonl on 9/22/2025* ### Is there an existing issue for this feature request? - [x] I have searched the existing issues ### Is your feature request related to a problem? The Ironing default angle behavior in OrcaSlicer is the same angle as the top surface angle. Ironing should be done at an angle offset from from the top surface lines angle as implemented correctly in other slicers. PrusaSlicer uses a 45 degree angle offset for ironing https://help.prusa3d.com/article/ironing_177488 Cura uses a 90 degree angle offset for ironing. Bambu Studio uses 45 degree offset as the default behavior from what I remember. <img width="1679" height="416" alt="Image" src="https://github.com/user-attachments/assets/8eb64489-29fc-4c6b-b0a9-fc742391ce53" /> ### Which printers will be beneficial to this feature? All ### Describe the solution you'd like Ironing default angle should be dynamic and be an offset angle from the top surface infill angle. I think this may be done by modifying `Fill.cpp` https://github.com/SoftFever/OrcaSlicer/blame/main/src/libslic3r/Fill/Fill.cpp#L1547 from ``` ironing_params.angle = (config.ironing_angle >= 0 ? config.ironing_angle : config.infill_direction) * M_PI / 180.; ``` to ``` ironing_params.angle = (config.ironing_angle >= 0 ? config.ironing_angle : config.infill_direction + 90) * M_PI / 180.; ``` ### Describe alternatives you've considered Specifying a specific ironing angle does not solve this issue because the top surface infill angle varies depending on which layer you are on so it is not possible to get ironing to always be at a 90 degree offset to the top surface with a fixed angle. ### Additional context _No response_

MrUnknownDE closed this issue

2026-04-05 23:45:05 +02:00

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Notifications

Due Date

No due date set.

Dependencies

No dependencies set.

Reference: github/OrcaSlicer#2103