I want to set up a parts cooling fan but I’m having no luck. Earlier I was using Marlin 1 but had to change to Marlin 2 to get 3D Touch working. I’ve done a lot of fiddling so I’m going to dump this all out in bulletpoints.
Using Marlin 1 (can’t use with 3D Touch):
- Two different 2 pin fans only worked at full speed
One 3 pin fan worked properly (can’t use because it’s noisy and vibrates)
Everyone else seems to get 2 pin fans working that they can control
- 2 pin fans don’t work at all
Multimeter shows it at constant 12 volts when turned on
Shows negative 12 volts when turned off (like it just flipped the polarity)
What I’d mostly like to ask though, does anyone have an example of end to end setting this up? Most examples on the internet just don’t do it in detail, mostly they just cover printing the brackets for the nozzle. I need to know about wiring and firmware changes.