Jump to content
Ultimaker Community of 3D Printing Experts

Recommended Posts

Hi guys,

I got a question regarding the ultimainboard (ultimaker 2 electronics) i want to control the small 5v fan with pwm instead of always being on, but which connection can i take for this, if there's any left?

So i'm looking for a 5v output with pwm signal.

Thanks in advance :)

Share this post


Link to post
Share on other sites

On mainboard rev. 2.1.4 it is controlled via a transistor connected to the atmega pin PJ6 (integrated in the circuit).

On rev. 2.1.1 it is directly connected to 5v without any way to control it.

If you have the old revision and if you are keen on modifying the firmware and a little soldering you can buy a BC817, a 1k resistor and a diode (a small 1n4148 or similar will do), and build a little pin driver (just like the one for the cooling fans and LED stripes) and move the fan ground to the transistor and connect everything (for easy access) to pin 3 of the EXP3 header (which is the atmega PB7 pin, which is PWM capable).

You should not directly connect the fan to PB7 as it would exceed the power delivery capabilities of that pin (the fan can easily draw 100mA which is way to much for any atmega pin).

Edited by Guest

Share this post


Link to post
Share on other sites

Hi,

Changed my version 2.1.1 board today with the electronics used in de the 2.1.4 version. Now I have a silent Ultimaker 2 while not printing!

Changed the firmware:

Fan on at 40C (EXTRUDER_AUTO_FAN_TEMPERATURE) and turn off at 35C. Otherwise at cooldown around 40C fan goes off and on. Now a hysteresis.....

See you,

Jaap.

Edited by Guest

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Our picks

    • Ultimaker Cura | a new interface
      We're not only trying to always make Ultimaker Cura better with the usual new features and improvements we build, but we're also trying to make it more pleasant to operate. The interface was the focus for the upcoming release, from which we would already like to present you the first glance. 
      • 114 replies
    • "Back To The Future" using Generative Design & Investment Casting
      Designing for light-weight parts is becoming more important, and I’m a firm believer in the need to produce lighter weight, less over-engineered parts for the future. This is for sustainability reasons because we need to be using less raw materials and, in things like transportation, it impacts the energy usage of the product during it’s service life.
        • Thanks
        • Like
      • 12 replies
×

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!