Hello again everyone. I’ve always had problems with ABS warping but recently I’ve had issue with PLA warping too. I’ve used every trick to level my bed so I don’t think thats the issue. Recently I had some other issues with my printer that involved me unplugging/replugging stuff into my board to try and get it to work and if memory serves thats about the time my pla prints started to warp. This morning when I was cleaning off the print bed for another print I could feel the fan that cools the hotend blowing on my arm from 150mm off the bed. With all that said here are the questions:
1: Shouldn’t the fan be sucking air from the outside world and blowing it onto the hotend and not the other way around?
2: Is it possible/reasonable that I might have inverted the jst plug or installed the fan backwards?
3: Anyone have shrouds or different fan mounts to prevent air being pulled from/pushed onto the bed? (I’m not looking to change fans. Just the mount)
As I write this I realize I probably just installed the fan backwards but I’m posting it anyway just in case I am wrong/someone else is having the same issue/there is a better solution.
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Its definitely possible that the fan was inverted, I had this same problem at a rep2 at one point in time.
3Dex
3
Im not sure it matters whether the fan pushes or pulls air over the print bed. All the printers I have experienced push air (blows) across the print bed rather than pulls (sucks) air across.
However, I also had a similar situation to you once where my prints were warping. In fact, the plastic was solidifying around the nozzle and causing a clog on longer prints.
I cured this by simply disconnecting the fan all together. Since disconnecting the fan I have not had any troubles whatsoever with warping or clogging. I think provided you have a well ventilated print bed you might not need a fan at all. However, this was just my experience. Im sure others have had polar opposite experiences.
Hope this helps,
Cheers,
3dexfilament.co.uk
I inverted my fan (now pulls air from bed and pushes onto hotend) and everythings back in working order.
To the point of disconnecting fans. I have two unique fans on my printer with two unique purposes. 1: naturally aimed at the print bed to cool the plastic and 2: Aimed at the hotend to cool it and prevent clogs. The first is worthless to me as I have never seen a direct advantage from it and I have seen increased warping while its been active. The second is invaluable to me as whenever its not running I am guarenteed to have a clog that requires disassembling of my printer and a short cook in the oven for the hotend.
When you say you disconnected a fan. Which are you talking about? To be more specific with my problem my hotend fan (2) was flipped in its casing so it was just blasting air full force down on the bed and warping everything.
P.S. I don’t know if this is common knowledge but the hotend on the robo3d printer is really easy to remove and its all metal. Whenever I have a bad clog I pop it into the oven at 500°F and it liquifies any and all plastic in the hotend making it painless to clear even the worst jams I have ever had.
