Hi,
I just tried to connect the extra cooling fan. But during the test, when I was using multimeter to check the voltage, I seemed mistakenly made a short circuit and saw a spark.
Now even I have reverted the circuit to the factory status (removing the Y splitter and re-connect the factory part cooling fan to the board), the part cooling fan always runs at likely full speed after the machine is powered on.
I also tried to send M106 and M107 command through Luban, but the fan just does not stop.
Is there any possible way to fix this? Thank you guys.