chamber_filter

[pulsar mountain]

Hi,
what do I need to do if I want different speeds for the chamber_filter macro during / after a print?

I'm on RatOS 2.1 and are really bad with macros....

I've got the problem that I get warping with the filter running at 100% during a print.

[hidden hound]

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[drifting grove]

You can set a max_power on your fan in your config

see https://www.klipper3d.org/Config_Reference.html#fan_generic

[pulsar mountain]

thank you!
but I don't know how to get this to work aside the chamber_filter macro...

Would it work if I put something like this in the Orcca slicer at "Machine end G-code" beneeth "END_PRINT"?

SET_GCODE_VARIABLE MACRO=RatOS VARIABLE=variable_chamber_filter_speed VALUE=1

[drifting grove]

No, you have a fan configured for you chamber filter, just add max_power to that section.

Set it to 0.5 for 50% for example.

Or do you want to change the speed dynamically?

Another thing is, your chamber filter should not cause warping, it should be inside recirculating air, not venting air to the outside or blowing air into the enclosure.

Recirculating ensures maximum filtration, if you push air into the enclosure you create positive pressure and then all the contaminants will just escape through any tiny opening in the enclosure. If you exhaust instead you'll only run the air through the filter once, which doesn't accomplish much in terms of filtration.

[pulsar mountain]

Ah, now I understand. 👍 Awesome explanation for me.
I wanted it to change dynamically (0.2 during print, 1.0 after the print.

But....

As you explained the filter can't be the problem for my warping. So I'll do a search for where the air escapes. 'cause Recirculating air through the filter is what I'm aiming for.

Thank you very much!!