If you have ever tried to save a print with too much or too little part cooling you may have tried the fan slider in Fluidd or Mainsail and been disappointed. Your changes wont stay for long because modern slicers are constantly adjusting part cooling. I had a long think about this, like 6 months, and wrote up 2 other versions of this before arriving here. I wanted something that was very easy to use, just like Extrusion Multiplier and Print Speed overrides. But I also wanted something that could complement the slicerās dynamic fan control. So this is ADJUST_M106:
It can change your fan output by a fixed percentage for the rest of the print: ADJUST_M106 ADJUST=20
It can map a range of fan values onto another range. So if you had the dynamic fan set at 50% to 80% you could turn that into 30% to 100%, resulting in more cooling for bridges but less cooling on large layers: ADJUST_M106 ADJUST=50->30|80->100
You could even map 0%-100% to a single value making the fan run at that speed only. ADJUST_M106 ADJUST=0->30|100->30
The min and max power of the fan can be adjusted on the fly.
It knows that 0% means fan off and wont change that behavior unless you ask it to. You can have the fan always off, always on (it understands off_below, always on will be on) or on/off controlled by the slicer.
Your tweaks can be disabled and enabled so they can stick around between prints.
Tweaks can be cleared with a macro call too.
The readme file has a cookbook section that covers some common part cooling scenarios and gives a sample command for each.
This is still pretty fresh/alpha so Iām looking for feedback from those of you that want to use a tool like this. If there is enough interest Iād like to have a UI for this in Fluidd or KlipperSreen. If you use this please let me know your experience!
Very good work we really should have more things like this and, less slicer other then toolpathing. never been a fan of things like this hijacking my controls leading to a cancel print.
I donāt see the link to try this macro! Iām struggling with Abs overhangs and bridging. If I run fan at 20 it help a little but 30 is better. Only problem is the print will start to pull up if itās on the whole build. So I am constantly having to babysit the print and it sucks.
I have looked at the bridge settings but havenāt implemented them. I think itās going to take some time to get right. Mind giving me some settings to start? The default might work but I am unsure
I usually run 75mm/s for my bridging speed. 90% for my bridge flow ratio, and fan at 100%. (for bridging)
Usually the bridge flow ratio has the biggest effect. You want to āpullā the filament as you bridge, and lowering your ābridge flow ratioā setting is how you achieve that. These settings are what I use for PLA btw.
In prusa slicer (what I use) in the cooling section, you can set a general fan speed (the speed used for most of the print) and you can set a bridging speed. Just set your bridging fan speed at 40% (maybe? based on what you said) and for your main print, just run a fan speed that works for you. Something like 15% to 10% would work.
Yes thanks! I have really been looking at learning Super slicer or something other than Cura. Iāll mess with the bridge settings with the flow tuned down. Iāll run some tune prints to see what combinations work best.
You can definitely link back to this thread but by starting a new one with all the requested information (ie klippy.log - which you will probably be asked for) the process will go much smoother.