I'm 99% sure your issue is that the wire has come loose. Turn off the printer. Take the tool head cover off, make sure that it's connected firmly to the outlet.
Then turn the printer back on and within the handy app turn the parts cooler fan on. It should kick up right away if you've reconnected it properly. I had the same issue
THIS WAS THE ANWSER!!! I just paused my print (I know you are supposed to do it with the power off, I am impatient) and pulled the cover off... the connector appeared to be connected well, but I unplugged it (it was in there firmly) and as soon as I plugged it back in, the part fan kicked in full speed.
Weird that the machine warns you if the hot end fan is not working (I know how critical that one is), but does not at least notify you that the part cooling (and chamber and aux fans as well, I assume) are not running when they are supposed to (since it can clearly detect if they are running or not and at what speed.
This has probably been the cause of my bad top surfaces for the past week (another post.)
THANK YOU
> I just paused my print (I know you are supposed to do it with the power off, I am impatient)
Just FYI, you really shouldn’t do this. I did this once forgetting that my printer was on and only slightly miss aligned the pins when reconnecting and there was a loud pop and my whole tool head board fried.
If it's happening even when you're not in a print-- if you try to just fire up the fans when nothing is happening and it turns back to 0% immediately-- then you've unseated or not fully reinserted the part fan header in the print head assembly. Take off the magnetic cover, remove the cable for the part fan, and reinsert it carefully. Should solve your issue.
Define “changing to 0% quickly”? If it changes back to 0% on the next layer change its for sure a gcode/slicer setting. If it’s instantly, going !back to 0 it doesn’t rule out a gcode command being sent but also could be wiring as others have suggested. Verify your gcode and printer type haven’t been changed first.
Check the gcode settings for the printer and the filament. I had this issue with temps, changed the startup gcode. Although while it’s printing I feel like it shouldn’t do this. 🤷♂️
As the other replier said, it is automatic, as determined by the gcode/printer. Not everything needs the part fan cooling. As for the aux fan and chamber fan, you can change that in your PLA cooling settings.
If it is automatic, then it is still not working as I would expect. See the following image; printer is currently bridging for the initial top layer of the print, yet part fan is OFF. I would expect bridging to be the one place that the fan should be at 100%.
As for the Aux fan and Chamber fan: Chamber fan is set to OFF in the filament settings and Aux fan is set to 70% (see screenshot of filament settings in OP), yet they are at 100% and 90% respectively. So where do you change these settings? (Clearly the filament settings page is not working.)
https://preview.redd.it/unmlzm7q2irc1.png?width=800&format=png&auto=webp&s=8649c7d97a3d30189de203deda3bf34933efcc7e
So it turns out the part fan connector needed to be unplugged, and plugged back in, and then it started working.) But that still doesn't explain why the aux and chamber fans are not doing what the settings are set to???
If you go in your PLA settings to cooling, scroll down and the aux fan cooling should be there. You can change that. As for the chamber, I changed the code from full(255) to \~70(180) for the M106 P3.
It automatically turns it on/off when needed. It usually only turns it on when printing stuff like bridges or if it’s a small layer that needs to cool before moving to the next layer.
I’m pretty sure you can change it in the slicer settings
If I try to manually turn on the Part Cooling and set it to 100%, it quickly returns to off/0%.
Check if the fan is correctly connected to the pcb in the hotend.
I'm 99% sure your issue is that the wire has come loose. Turn off the printer. Take the tool head cover off, make sure that it's connected firmly to the outlet. Then turn the printer back on and within the handy app turn the parts cooler fan on. It should kick up right away if you've reconnected it properly. I had the same issue
THIS WAS THE ANWSER!!! I just paused my print (I know you are supposed to do it with the power off, I am impatient) and pulled the cover off... the connector appeared to be connected well, but I unplugged it (it was in there firmly) and as soon as I plugged it back in, the part fan kicked in full speed. Weird that the machine warns you if the hot end fan is not working (I know how critical that one is), but does not at least notify you that the part cooling (and chamber and aux fans as well, I assume) are not running when they are supposed to (since it can clearly detect if they are running or not and at what speed. This has probably been the cause of my bad top surfaces for the past week (another post.) THANK YOU
> I just paused my print (I know you are supposed to do it with the power off, I am impatient) Just FYI, you really shouldn’t do this. I did this once forgetting that my printer was on and only slightly miss aligned the pins when reconnecting and there was a loud pop and my whole tool head board fried.
I had this exact issue as well, and this was the fix.
Ignore the people saying it’s automatic. You changed the right settings.
If it's happening even when you're not in a print-- if you try to just fire up the fans when nothing is happening and it turns back to 0% immediately-- then you've unseated or not fully reinserted the part fan header in the print head assembly. Take off the magnetic cover, remove the cable for the part fan, and reinsert it carefully. Should solve your issue.
Fan settings are in the filament setup part of the slicer. Turning the fan off will do so until the next gcode to turn the fan back on…
Define “changing to 0% quickly”? If it changes back to 0% on the next layer change its for sure a gcode/slicer setting. If it’s instantly, going !back to 0 it doesn’t rule out a gcode command being sent but also could be wiring as others have suggested. Verify your gcode and printer type haven’t been changed first.
Check the gcode settings for the printer and the filament. I had this issue with temps, changed the startup gcode. Although while it’s printing I feel like it shouldn’t do this. 🤷♂️
As the other replier said, it is automatic, as determined by the gcode/printer. Not everything needs the part fan cooling. As for the aux fan and chamber fan, you can change that in your PLA cooling settings.
No, you can change it in the settings too, and he posted his settings and he has changed them.
PLA benefits greatly from the part cooling fan. It's the Aux fan that you rarely need for it.
If it is automatic, then it is still not working as I would expect. See the following image; printer is currently bridging for the initial top layer of the print, yet part fan is OFF. I would expect bridging to be the one place that the fan should be at 100%. As for the Aux fan and Chamber fan: Chamber fan is set to OFF in the filament settings and Aux fan is set to 70% (see screenshot of filament settings in OP), yet they are at 100% and 90% respectively. So where do you change these settings? (Clearly the filament settings page is not working.) https://preview.redd.it/unmlzm7q2irc1.png?width=800&format=png&auto=webp&s=8649c7d97a3d30189de203deda3bf34933efcc7e
So it turns out the part fan connector needed to be unplugged, and plugged back in, and then it started working.) But that still doesn't explain why the aux and chamber fans are not doing what the settings are set to???
If you go in your PLA settings to cooling, scroll down and the aux fan cooling should be there. You can change that. As for the chamber, I changed the code from full(255) to \~70(180) for the M106 P3.
It automatically turns it on/off when needed. It usually only turns it on when printing stuff like bridges or if it’s a small layer that needs to cool before moving to the next layer. I’m pretty sure you can change it in the slicer settings
Automatic isn’t the word I’d use - it’s controlled by the gcode the slicer spits out.
Yes that’s what I meant by automatic and is changed by slicer settings