M107 called unnecessarily and far too often: Klipper halts (Timer too close)

[madejackson]

Bug description Superslicer inserts high amounts of M107 / fan stop calls (about 250'000x in my case), even when disabling Fan control completely (0x M106 calls in gcode). It's so much, at one point in my specific gcode, it overloads my MCU and halts the print. The gcode File size is reduced ~10% by just deleting all the useless M107 lines. Both, Arachne & Classic are affected.

More Info

Expected behavior Only generate M107 gcode after M106 was issued previously.

!!>> Project File <<!! D0_bearing_based_spirographic_WDT_tool_2024_14.zip

To Reproduce

• Slice .3mf file and print it or check the logs / amount of M107. --> It'll overload MCU at Layer 27 / Z5.5.
• Manually Remove all lines with M107 in gcode. --> Prints perfectly fine.

Screenshots

Desktop (please complete the following information):

• OS: Linuxand Windows
• Version 2.5.59.6-2.5.59.10 is affected. (2.4-2.5.59.5 is not affected)
• Printer model: Dueling Zero

Additional context Add any other context about the problem here.

[CuredPrusa]

I think this could be related to #4225.

[madejackson]

It may be related but it's not completely the same. My issue startet appearing from 2.5.59.6, 2.4-2.5.59.5 is not affected. Also The issue appears even when disabling all fan speed control when no M106-Commands are present in the gcode.

[supermerill]

I'll see if 4225 solve the issue. also #4168