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17

The function of the front fan is keeping the cold end well... cold. :) It should be spinning as long as the printer is turned on. The right fan is known as "part fan" and its function is to cool down the plastic that has been just extruded, the idea being to solidify it as soon as possible. As you noticed it is controlled by the gcode and it can be turned ...


5

This definitely sounds like a problem with your wiring if you have a genuine Anet A6, the genuine A6 comes with a 12864 full graphic display. For sure, you are missing 1 flat ribbon cable (see below). Maybe this is causing the LCD not to light up and the SD card not functioning. As the "fan 2" is working, the board is powered by the power supply (this fan is ...


4

Yes, this should work. According to this 4-pin fan specification, such fans use a 5V PWM signal. You would have to make sure the PWM frequency on the pin you use satisfies that 21-28 kHz range specified in the document. According to 3.3 and 3.4 in the document, you may not be able to turn the fan off completely when using the PWM input signal.


4

It appears that there isn't an "out-of-the-box" solution to your request, but luck is with you. Someone with your board and objective has posted what appears to be a reasonable modification: http://www.instructables.com/id/Add-a-Cooling-Fan-to-your-Rep-Rap-Sanguinololu/


3

I think its only advantage is that it serves to move money from the folks who buy it to the folks that sell it, and that's an advantage purely for the folks that sell it. "Additional heatsink surface area" is quite doubtful - it would have poor coupling to the actual heatsink. If the actual heatsink is correctly designed, there's no need for additional area,...


2

The RUMBA board has two fan outputs. The primary fan output is switched by pin 7, the secondary one by pin 8. The reason your fan is not working when you set #define EXTRUDER_0_AUTO_FAN_PIN 8 is because it's switching the secondary fan. If you switch the wires over to the secondary fan output it will work correctly. If you do want to use the primary fan ...


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