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8-Pin Aircraft Connector Wiring Standard

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*Some soldering will be required if you wish to use the aircraft connector.

The hotend itself has 1 fan that is always on, a thermistor, and a heater cartridge. that is 6 wires. The layer cooling fans add an additional 2 wires bringing the count to 8 total.

Standard J-Head Aircraft Connector Pinout

Pinout:

Pin 1

Heater Cartridge

Pin 2

Heater Cartridge

Pin 3

Thermistor

Pin 4

Thermistor

Pin 5

Hotend Fan Positive (12v)

Pin 6

Hotend Fan Negative (Ground)

Pin 7

Layer Cooling Fans Positive (12v)

Pin 8

Layer Cooling Fans Negative (Ground)

Looking at the connector from the bottom we can see all 8 pins.

  1. Pins 1 and 2 will go to the hotend's heater cartridge.

    Since a heater cartridge is just a resistor it does not matter which wire goes to which pin here.

  2. Pins 3 and 4 will go to the hotend's thermistor

    Again a thermistor is a resistor (that changes resistance with temperature) so it does not matter which wire goes to which pin.

  3. Pins 5 and 6 will go to the hotend's fan.

    This does matter for polarity so make pin 5 positive(12v) and pin 6 negative(ground)

  4. Pins 7 and 8 will go to the layer cooling fans.

    Again polarity matters here so make positive(12v) go to pin 7 and negative(ground) go to pin 8

GX-16 8-Pin Aircraft Connector (16mm diameter)
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