@michaelr123
No, what I meant is:
your As are 10 and 12, while your Bs are 11 and 13, so I assumed A and B are your X and Y, that was in conflict with your M584 where Xs are 11 and 12 while Ys are 10 and 13.
But that's more a naming problem: maybe you named them based on the side of the printer, so X is A2B1 and Y is A1B2 in a cross configuration.
As for synchronization: you need to unscrew the pulley's set screws, move a bit the belts and then screw them again (I think, IIRC).
You mean in parallel?
The code should be:
M950 F{fan number} C"out2" Q25000 ; create fan {fan number} on pin out2 and set its frequency
M106 P{fan number} S0 H-1 C"Heater controlled fans" ; set fan {fan number} value. Thermostatic control is turned off
where {fan number} is the number you prefer
YAY!
I managed to flash the firmware!
I had to buy a 75cm long micro-USB cable graded for 480Mb/s to be able to do it, but it worked!
Then I tried something: I loaded again the firmware zip file ad told to update (it already was at 3.5.2) and it bricked again forcing me to re-flash the firmware...
@Exerqtor
They are marked for heaters because they can output a much higher current than other output terminals.
AFAIK there aren't drawbacks whatsoever and in your case it's also desireable since those fans draw a lot of current.
The other solution would be to use an external relais with a standard fan output (of which you are running short)