Oops, Shorted my hotend fan

Controllers Smoothie
1

Ok, I now know not to trust electrical tape alone for wire splicing. An old habit I picked up in the Navy.
My software controlled hotend fan no longer works, but every thing else on the board seems to be working correctly. I’ve just been using the always on fan power, what do I need to replace to get the software controlled socket working again, and how to I determine what failed if it isn’t obvious already.

Imported from wikidot

2

I’m not clear exactly what happened :

  1. Where was the fan connected to ?
  2. If a mosfet, was there a diode soldered on that mosfet ?
  3. If a mosfet, how did you control it ?

Cheers.

3
  1. It was the digitally controlled fan, I don’t have the printer in front of me (at work) but I believe I used the default:

switch.fan.output_pin 2.6 # The pin matching the MOSFET we chose
“here it is the second small MOSFET, using pin 2.6, so connector is X8/J6”

  1. I did not have a diode, hindsight 20/20. Didn’t know what type to use, now I see that has been updated in the documentation. So i’ll be adding one after I get this working.

  2. Software.

Edit. also thank you for the quick reply.

4

If you want to repair the board, you simply want to replace the broken mosfet ( see https://docs.google.com/spreadsheet/ccc?key=0Api7_ZbfikkKdGRDblUwMDFWcm1CT2M2bENkQWpZZ0E#gid=0 )

You may have a free mosfet depending on your setup, so you could also just use that instead in wiring and config.

Cheers.