I have an Azteeg X5 running on my delta,

Controllers Smoothie
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1

I have an Azteeg X5 running on my delta, and just recently my cooling fan won’t shut off. Normally, when I power it up the cooling fan’s off with no issues, and it stays off as it should until the second layer of the print. Now it’s on constantly. I haven’t changed anything in the config with relation to the fan setting. M107 won’t stop it - it’s just alwys on.

# Switch module for fan control
-----------------------------------------------------------------------------
switch.fan.enable                                true               #
switch.fan.input_on_command         M106           #
switch.fan.input_off_command        M107            #
switch.fan.output_pin                         2.4                 #

These settings have been the same since I had originally set this up. I’ve even compared it to some archived config files I’ve saved and they’re the same. But now my fan won’t turn off??? Any suggestions?

2

Broken MOSFET? Did you try a different mosfet?
http://smoothieware.org/3d-printer-guide#toc18
“Fans ( and other active loads like solenoids, mechanical relays, motors, anything with a coil ) can feed power back into the MOSFET and destroy it.”

check if you installed a diode across the MOSFET’s power output.