When I print ABS, the chamber fan displays 0% and I thought it would make sense to run at least a little to make use of the built-in filter. So looking in the filament settings, I’m not finding any setting for the chamber fan. How does one get that fan to spin when printing ABS?
The chamber fan is set via the filament g-code. Compare the PLA/PETG one with ABS (ABS is empty)
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I see. It’s a bit odd that they went through the trouble of including a filter but they don’t move any air through it by default when printing ABS. I wonder why.
The chamber fan’s stated intent is to lower temperatures for filament such as PLA so that it doesn’t soften and clog in the extruder. ABS and other high-temp filaments don’t need this.
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But ABS can use some air filtering. How can the filter operate without moving air through it?
To be honest, the whole chamber fan thing is a mystery to me as it doesn’t move much air, even at full speed. Possibly the carbon filter blocks too much airflow? Yes, if you print a lot of ABS or ASA you’ll want some effective filtering, though for you and not for the print - the chamber fan isn’t useful for that.
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I read the thread about the chamber fan hardly blowing and possibly sucking air back in but that’s not the case for me. It works well.
So I ran an ABS print with a 10% fan speed and the chamber stayed at 41C so I’m OK with that. In addition, I’d like to run it full speed after the print is done but my end code did nothing. What did I do wrong?
Could it be that it is conflicting with the ‘hibernation’ setting of the printer after the print is done? What is your setting there?
I believe that the filament end gcode is used only when a filament switch is about to occur - it’s not for end of print. I do know that filament start gcode is run when a new filament is selected for feeding. you probably want this in the printer end gcode instead.
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I can’t find such setting. I do see in the printer’s settings some end code turning all fans off when it also turns off the bed heat. If my 5-minute wait worked, I would have seen the heat stay on but it didn’t so either the filament end code didn’t run or my wait command is wrong. I would not want to wait 5 minutes with all heat on so I’m giving up on trying to run the fan automatically for now.
Could be but I only wanted to run the fan at the end of ABS prints, not for all filaments. I’m punting on this idea. I’ll revisit later. Seems like chamber fan control needs some UI improvements.
You can save a user preset for the printer that you use for ABS. I have done that for other things.
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Nice, I’ll try that. Thanks.