Dear all,
I successfully moved to th eE3D v6 hotend, which requires the FAN on the cold metal part to be always ON.
I am trying to figure out how to get the FAN to be ALWAYS ON when I turn on the printer, so that after printing FAN will not turn off. Can you help? I need constant 12V linked to power.
I already tried to search the forum, but did not find the answer: if I missed the link, can you please post it?
thanks a lot
Marco
Hi,
I am connecting the fans directly to the PSU.
Added a resistor in between the +
(can not tell what value since they are hidden in the heat shrinking tube).
But can be calculated with the watts of the fan.
P=UI
U=RI
with those formulas you can calculate everything you need
Must be something around 10Ohm I guess…
Grüße
Frank
Seems to me, you could code this into the end code, without much trouble?
If you look at the standard end G-code, you’ll find the M107 command, to switch off the fan. Comment this out or probably better yet, replace it with an M106 S… (“…”= add a speed value) command, to (re-)activate the fan.
If in doubt, store this modified printer setting into an extra configuration file & test with it until you’re happy with the result.
Hope this helps? 