Great success!

Today I printed a Marvin Keychain.

Left Marvin is from today's print with the new cooling fan and the right Marvin is printed one of the first days with the Vertex Nano printer.

The prints is made with the same gcode file sliced with Simplify3D.
Material PLA, print speed 40mm/sek, layer thickness 0.2mm, temperature 195deg.C, no support.

No touchup has been made on either of the Marvins!

The cooling fan is now published on thingiverse as:
https://www.thingiverse.com/thing:2365148

Happy printing
/Niels

Modifying firmware for the fan.

I have modified two files in Vertex-Nano-Firmware-master for controlling the cooling fan with standard M106 G-code.

File 1: Marlin-main.cpp
Find the function "set_led_brightness"
// Set led brightness according to current variable
void set_led_brightness()
{
   analogWrite(7, map(vertexLedBrightness, 0, 100, 0, 255));
}

and then just put a comment before the AnalogWrite statement:

void set_led_brightness()
{
// analogWrite(7, map(vertexLedBrightness, 0, 100, 0, 255));
}

File 2: pins_K8600.h

Change
#define FAN_PIN 8

to
#define FAN_PIN 7

And then compile  and upload to board. I used Arduino IDE ver 1.8.1

The LED can be connected to the 12V pin located near the connector for the internal fan.

Have fun
Niels

Cooling Fan (Revision 2)

Revision 2 Top view

From bottom

One screw holds it all.

Assembled

And in place

A few modifications to the firmware has to be done before testing but I don't have time during the next few days .-(

Have fun
Niels