Dynamic overhang speed does not respect pressure equalizer limits

[murk-sy]

Description of the bug

When enabling both Dynamic overhang speed and Pressure equalizer, the max volumetric slope is not respected when entering the dynamic overhangs. Both settings are experimental.
Side note: Dynamic overhang speed is not listed as experimental in the slicer, while Pressure equalizer is.

Project file & How to reproduce

1. Insert model with overhangs (45° is fine)
2. Enable both Dynamic Overhang Speed and Pressure equalizer
3. Set both max volumetric slopes to a low number (such as 0,5 mm^3/s^2) for best visibility

Checklist of files included above

• Project file
• Screenshot

Version of PrusaSlicer

2.6.0-alpha2

Operating system

Windows 10

Printer model

Prusa Mini

[kubispe1]

Thank you for your cooperation issue was tested. The fix will be part of the next release.

[igiannakas]

Issue appears unresolved in the latest alpha. I still get abrupt speed change on overhang perimeters despite the volumetric slope being enabled.

[igiannakas]

This pull request fully fixes it. I have manually merged it on my local machine and compiled it and the problem is solved:
#9622

[kubispe1]

@murk-sy can you retest with new 2.6.0-alpha5. There are fixes to this issue.

Fixed "Dynamic overhang speed" when Pressure equalizer was used (Changelog)

Thanks

[murk-sy]

@kubispe1 Does not appear to fix the issue

Same model:

Sample project:

2023-03-09 dynamic overhang speed - pressure equalizer.zip

[zxy16305]

in 2.6.1 has same problem, change pressure equalizer value not effect overhangs speed.

pressure equalizer set 10:

pressure equalizer set 0.1:

project:
Thumb_Saver_-_Massage_Tool.zip

[igiannakas]

As of 20231226 and PrusaSlicer 2.7.1. This issue still exist and causes very noticeable defects when dynamic overhang is at 5mm/s to fix curling on petg while the perimeter print speed is 40+mm/s Also the acceleration and decceleration happens way to early slowing down the whole print. Very annoying

Your best bet is to use orca slicer to be honest. I have ported over the pressure equalizer feature (extrusion rate smoothing) and have implemented the fixes proposed a year ago to respect pressure equalizer limits on external perimeters. Don’t think prusa will address this as, from what I see, don’t see the need for pressure equalizer on external perimeters at all.

[igiannakas]

[lukasmatena]

Fixed in PrusaSlicer 2.7.3-alpha1, thanks to @MGunlogson for the implementation. Closing.