Cooling fans issue

[grpiotr91 10]

Hi,

I am an owner of Ultimaker 2 for about a half a year. Since a week I have been experiencing problems with cooling fans. I try to turn them on at the start of machine.

I go to the maintanace - > advanced - > set fans speed - > set 100% and nothing happens, the voltage on fan pins are 2.5 V.

Where can I look for reason of this issue.

Best regards

Piotr

 

[DidierKlein 729]

Hi and welcome to the forum.

If they don't start at all it might be a loose connection (either on top of the head or on the electronic board).

You can check https://github.com/Ultimaker/Ultimaker2/blob/master/um2%20assembly%20manual%20V1.1%20_english.pdf

 

[grpiotr91 10]

The connection near head is good, I will check the connection on board later.

The problem is that the voltage on pins near head is 2.5V when the 100% speed is set.

 

[korneel 175]

isn't your gcode now actively turning them off again?

can you try setting your cura profile to start fans immediately and see what that does?

 

[grpiotr91 10]

It doesnt start on print and by the advanced menu. I think it might be some problem with the electronics. Had anyone any experience with it?

 

[visu-al 2]

that's what i tought as well. if you set fan speed the gcode regularly checks if fan speed set to zero as this is what usually is the setup in the gcode.

when i had this problem i waited the print to start and then set the fans and leave it in the set fans menue that way it stays the value that is on the display..

 

[grpiotr91 10]

The transistor responsible for fan's pwm is conducting electricity constantly - w/o depending on settings in controller. I think it is dead.