Vertex K8400

[Pj_Doyle]

Hey guys,

I had trouble with the two fans on my hot end before, i taught the motors in them burnt out, so I got replacement fans. They arrived today and I installed them but it turns out the new ones wont work either.

Does anyone know what could be the problem?

[TH3_Downer]

Are the well/correctly connected.

Aren’t the wires broken?

[3drapidprints]

Look at where the fans connect to the wires and more importantly, where the wires connect to the circuit board. Does that connection seem loose? If you stick a voltmeter to it, does it show any readings? If it doesn’t, try re installing your filmware, other than that, a bad board would be likely.

[Pj_Doyle]

The wire connections seem fine and I thoroughly inspected them after installation… It could possibly be the circuit board… I hope not… how can I test the connection point where the fans go into the board?

[Pj_Doyle]

Everything looks ok with the wires after inspection… they are brand new and connections seem fine.

[3drapidprints]

If you have a multimeter or voltmeter, select the DC Volt setting (labeled as Vdc or VDC or DC) and touch one lead to one pin on the circuit board.

[Meonys]

Hi,

Activate manually the FAN in the Repetier software (manual control window).

Then plug a Voltmeter at the FAN output of the circuit board (at hotend level).

Do you measure a voltage?

Try the same measure at the FAN output of the mainboard.

If you d’ont have any voltage, your circuit board or your mainboard should be defective.

[Impact_HUB]

Hello,

your issue can be due to a wire problem between the mother board and the controller for the fan.

It can also be a problem of the mother board itself. Check if nothing burn on the mother board.

[Pj_Doyle]

hey thomas,

can i activate the fan manually from the printer as i dont have the connection to my laptop…

When im using the voltmeter i plug it into where the fans connect or where the cable loom connects to the hot end board?

[Pj_Doyle]

I checked the top board. Where the fans are connected, there is 10.51 v going through… so there is power but is there enough… or is the problem the fans…

[Meonys]

10.51V, the fan should spin, could you try with another fan?

You can’t activate manually the fan from the printer menu but you can activate the head pre-heat, the fan cooling should start.

If you have a power supply you can test your fan, supply it with 5VDC (continuous) and check if it works.

[Impact_HUB]

If you pre-heat it start the fans.

Plug your voltmeter on the screw over the black and white wires.

[Pj_Doyle]

Fans work perfectly, checked with a 9v battery