Overheating due to missing option of printing order of walls per complete layer (vs. per object feature) #937

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MrUnknownDE · 2026-04-05T16:36:34+02:00

MrUnknownDE commented

2026-04-05 16:36:34 +02:00

Originally created by @EVO8888 on 1/29/2026

Is there an existing issue for this feature request?

I have searched the existing issues

Small features are overheating due to wall printing order with multiple parts.

Which printers will be beneficial to this feature?

All

Describe the solution you'd like

There should be an option to group toolpaths by wall type across an entire layer, rather than completing all features of one part before moving to the next. For example, the printer would first print all outer walls of all parts and features within a layer, then all inner walls, followed by infill or any other selected strategy.

While this approach would increase travel moves, it would significantly improve layer cooling on small features and dramatically reduce curling and overheating issues.

Describe alternatives you've considered

Conventional cooling strategies for small features (such as minimum layer time slowdowns, increased fan speed, or auxiliary cooling towers) are not viable options for printers operating with heated chambers at 70–100 °C, as required for materials like ABS, ASA, and PC. In these environments, active part cooling is either ineffective or intentionally limited to preserve layer adhesion and prevent warping.

Additional context

As a result, print-order–based strategies—such as grouping toolpaths by wall type across an entire layer—become far more critical, as they allow small features additional passive cooling time without relying on airflow or temperature reduction.

*Originally created by @EVO8888 on 1/29/2026* ### Is there an existing issue for this feature request? - [x] I have searched the existing issues ### Is your feature request related to a problem? Small features are overheating due to wall printing order with multiple parts. ### Which printers will be beneficial to this feature? All ### Describe the solution you'd like There should be an option to group toolpaths by wall type across an entire layer, rather than completing all features of one part before moving to the next. For example, the printer would first print all outer walls of all parts and features within a layer, then all inner walls, followed by infill or any other selected strategy. While this approach would increase travel moves, it would significantly improve layer cooling on small features and dramatically reduce curling and overheating issues. ### Describe alternatives you've considered Conventional cooling strategies for small features (such as minimum layer time slowdowns, increased fan speed, or auxiliary cooling towers) are not viable options for printers operating with heated chambers at 70–100 °C, as required for materials like ABS, ASA, and PC. In these environments, active part cooling is either ineffective or intentionally limited to preserve layer adhesion and prevent warping. ### Additional context As a result, print-order–based strategies—such as grouping toolpaths by wall type across an entire layer—become far more critical, as they allow small features additional passive cooling time without relying on airflow or temperature reduction.

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Reference: github/OrcaSlicer#937