I’m presuming that your printer is a TAZ, with the two extruder fans on each side and the hot-end cooling fan on the front of the print head, right?
Sorry, I should have been more clear. Yes, I have the Dual V3 on my TAZ 6.
The cooling fan on the front is hard-wired to the +5v line, and cannot be speed controlled nor turned off – and that’s a good thing.
100% agree. Again, I should have been more clear.
The two extruder fans on either side of the print head are wired together, so they act as a single fan. They cannot be controlled independently.
I looked up the mainboard and see that there are several fan connectors: Fan 0, Fan 1, Fan 2, 5V Fan
Fan 0 and Fan 1 seem to correspond with Heat 0 and Heat 1. Fan 2 is the case fan and 5V Fan seems to be the fixed common cooler block fan.
The schematic of the mainboard (RAMBO 1.3) shows that each fan is independiantly controlled by the microprocessor.
(MOSFETS section in the middle)
So, the hardware supports individually controllable fans. Even if they were wired together, I would think that I could still control that fan index (and both fans would respond the same), but none of my
M106 P<index> S255
commands yeilded any response at all. I am running 18.104.22.168 (current Lulzbot Cura 3.6.3 firmware). Could this be disabled in the firmware??