Close

Finally time for production

A project log for Huvud, a 3D Printer Tool Head Controller Board

World's smallest (42x42mm) 3D printer controller board for use on a direct drive hotend. Made to run Klipper firmware.

Pontus BorgPontus Borg 10/28/2020 at 17:123 Comments

One more version was assembled today, and it works perfectly fine. The differences from before is an added ESD protection diode on the CAN bus and the CAN bus is now in the same connector as power. 

The CAN bus used to have it's own 4-pin JST PH connector but is now in the Molex Micro-Fit together with power. That connector is now a 2x2. 

This was the last prototype for this round and I will now start some volume production. First batch will be only 200 boards. It's hard to know how big the market is and as it's just a hobby project I take things one step at a time. 

Time to start hacking on the software some more now. The CAN-serial tunnel used by klipper is a bit hacky and needs some love. And a CAN bus capable bootloader would be awesome since it's a major pain to update the firmware if you have many boards.

And I should make a little jig for testing and programming the boards. Anyone have hints where to get pogo-pins or other useful test-jig items/software etc?

Discussions

John Jardine wrote 02/01/2021 at 22:36 point

Excellent thanks. I'm awful with an iron but pretty decent with hot air :) I've ordered 5 off JLC and another 2 off your tindie. 

  Are you sure? yes | no

John Jardine wrote 01/25/2021 at 01:54 point

Hi, I'm curious, if you built 100 of these, where are you selling them? I just ordered a few off JLC and found this post afterwards. 

  Are you sure? yes | no

Pontus Borg wrote 01/25/2021 at 05:49 point

I just set up a Tindie shop a few days ago, https://www.tindie.com/products/huvud/huvud-3d-printer-hotend-control-board/

It works fine to have JLCPCB make them too. They tend to be out of a few components, if you are handy with a soldering iron you can put them on manually.

  Are you sure? yes | no