Regarding Chamber Lights V4.4.21

[m00x-pixel]

1.) With current Firmware V4.4.21 -> "Chamber light remains on in sleep mode"

Is it possible to make it switchable, maybe directly from the config file? I like it to be off in standby or sleepmode but maybe the option is switchable if needed.

2.) Since i have the Printer, the light are slightly strong flickering only during printing but not during heating the Hotend/Bed. I read about many posts on facebook many have this behavior.

Maybe there is some option to lower or set higher PWM frequency on the light output via config file?

Thanks for reading.

[dewi-ny-je]

The flickering is caused by the voltage on the power supply which is affected by the current draw of the bed. It can't be solved in software.

[CChen616]

With current Firmware V4.4.21 -> "Chamber light remains on in sleep mode"

Actually the change is "Chamber light setting remains the same in screen off mode"，I will update the relevant release notes.

Try add this to [heater_bed] section of the printer.cfg:

pwm_cycle_time: 0.0100

This can increase the frequency of the heated bed, stabilizing the voltage of the lights at a lower level. The default value is 0.1.

[dewi-ny-je]

Good idea

[m00x-pixel]

@CChen616 Thank you for your response.

The option pwm_cycle_time did the job, the flickering is much more less with it.

About the light sleep mode, what setting i need to set in order to turn off the light when the display goes to sleep or just set a time when the printer is in idle to turn off the light?

Thank you in advance.

[CChen616]

The lights now have a standalone switch, which can be found on the home page or in the "More Options" section in printing page.

[m00x-pixel]

Thank you for the response.

Maybe there is missunderstanding. I know you can manually turn off the light, but it is not the goal here.

I just want to have back the automatic turn off when the printer is in idle state and the display turn off.

[CChen616]

The main reason for having the lights not follow the screen-off is to accommodate timelapse. Keeping the lights on during a long printing ensures better quality for the final video.

I'm considering adding a configuration section to klipper.cfg to toggle whether the lights follow the screen sleep mode.

If works well, it will be added in next version.

[m00x-pixel]

I get it, Thank you.

So i think the issue could be closed.

[Tyler-DurdenRUL1]

hello @CChen616, quick question... my led strip in both my q1 pro's are flickering bad as well. I am currently in my printer.cfg section on fluidd and I am not sure if I type in that command directly in the heater_bed section on the last available line in that section? or do I need to add it somewhere else? I am just starting to get the hang of these commands for klipper. thank you