I have swapped from an ANET board after it burnt out.

I have connected the print cooling fan to D9 - I presume this fan is controlled via GCode in the print ?

I also have the fan for the extruder - where do I connect this on the board ?

Thanks in advance.

The fan for the extruder needs to be on all the time so should be connected to the main power line.

Thanks.

So just wired direclty in to the 5A or 11A power input ?

if using marlin have a peek configuration Adv.h

there's a nice little feature to control the hotend fan.

// Extruder cooling fans
// Configure fan pin outputs to automatically turn on/off when the associated
// extruder temperature is above/below EXTRUDER_AUTO_FAN_TEMPERATURE.
// Multiple extruders can be assigned to the same pin in which case
// the fan will turn on when any selected extruder is above the threshold.
#define EXTRUDER_0_AUTO_FAN_PIN -1
#define EXTRUDER_1_AUTO_FAN_PIN -1
#define EXTRUDER_2_AUTO_FAN_PIN -1
#define EXTRUDER_3_AUTO_FAN_PIN -1
#define EXTRUDER_AUTO_FAN_TEMPERATURE 50
#define EXTRUDER_AUTO_FAN_SPEED   255  // == full speed

if you dont use a Heatbed could use that pin..but most of us do, so one ready made solution fan board

Edited 1 time(s). Last edit at 04/23/2016 03:09AM by jinx.