![]() OItherwise, your cooling fan would be stuck on. It does matter though to ensure the print cooling fan is in the "correct" location the particular firmware is going to control. ![]() it's not a horrible idea to consider moving the mainboard print cooling fan to a non-controlled constant on output rather than the firmware controlled on. So again, a few hardware plug locations just needed swapped around.Įven if this new firmware Wanhao just released retains the original D5 locations. That constant on 12V output does exist on the mainboard, just was not used normally. That then meant the mainboard cooling fan needed to be moved to a constant on output 12v. The idea was to move the print cooling fan (30mm at the head) to the 12v regulated but firmware controlled output. There was an underground "alternate" firmware out there that accepted gcode, but required 2 changes, and in light of the above, wasn't a bad idea. The stock 30mm fan is 12V rated, but fed 19V to give it a little more blowing power. In other words, that output puts out 19V. ![]() The other fan output on the board is not 12V regulated and is used for the print cooling fan up at the extruder head. The blower fan is 12V rated and the this particular output is fed by one of the 12V regulators on the board. It was not ever used (idle fan shutdown) but does has the caveat that the firmware must turn on this fan output. Otherwise, in a non-printing idle state, it might be possible to shut down the blower. The idea was that you could turn on the blower to reduce noise only when needed (whenever steppers were enabled and thus the drivers were heating). Wanhao used a mainboard cooling blower fan that was plugged into a firmware controlled output on the mainboard. Just to kind of frame this up for a better understanding.
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