search

bigtreetech / BIGTREETECH-SKR-mini-E3

BIGTREETECH SKR-mini-E3 motherboard is a ultra-quiet, low-power, high-quality 3D printing machine control board. It is launched by the 3D printing team of Shenzhen BIGTREE technology co., LTD. This board is specially tailored for Ender 3 printer, perfectly replacing the original Ender3 printer motherboard.
2.01k stars 1.98k forks source link

Today i started not having part fan control on my mini e3 #222

Open MarceloFS13 opened 4 years ago

MarceloFS13 commented 4 years ago

I dont know what happened but yesterday the board was working fine with control over part cooling fan but today it would not work anymore, the fans are at full speed all time. Any ideia what might happened?

ciidfrance commented 4 years ago

Same issue here !

vajonam commented 4 years ago

make sure your part cooling fan is attached to the FAN0 port. FAN1 is not controllable is better for the case fan. This is bit different from the E3 board layout.

CRTified commented 4 years ago

This might be the same issue as #238 - it might be a broken MOSFET, but it is somewhat hard to tell. I made a comment there on how to replace the MOSFET, if you want to try it yourself.

lilasiian8 commented 4 years ago

my HO MOSFET died last night and took the parts cooling fan along with it.

CRTified commented 4 years ago

@lilasiian8 That sounds unlikely, except when you use a fan that is not rated for the supply voltage (which might work fine if you do not run it at 100% speed, but will easily fail if you exceed the tolerances too much). If that's not the case, it is probably a bad coincidence (or the other way round, so that the fan failed and killed the MOSFET).

lilasiian8 commented 4 years ago

@lilasiian8 That sounds unlikely, except when you use a fan that is not rated for the supply voltage (which might work fine if you do not run it at 100% speed, but will easily fail if you exceed the tolerances too much). If that's not the case, it is probably a bad coincidence (or the other way round, so that the fan failed and killed the MOSFET).

I was trying to install a new controller fan; 12V with a buck converter. Parts fans are (2) 24V in parallel. So, maybe the controller fan wasn’t working and the board overheated causing the MOSFET to burn out?

Update: Tested controller fan with buck converter plugged into the HE fan pins and it works. I’m still not sure how the MOSFET blew