EBB42 V1.2 part cooling fan not working
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Description
I've just successfully installed the board and everything including the hotend fan works fine except the part cooling fan.
It's not moving at values from 0 to 255 and showing 0V output at 255 (full throttle).
Reversing the pins in the .cfg (PA0 for hotend fan and PA1 for part cooling) makes part cooling fans spin at 100% while hotend fan now inoperable so there's no electrical problem.
Changing pwm to hardware, cycle duty and kickstarting doesn't change anything.
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Research direction
Start by reviewing the board's .cfg pin assignments for the hotend and part-cooling fans, then compare the PA0 and PA1 behavior described in the report. Check the PWM-related settings already mentioned, including hardware PWM, cycle duty, and kickstarting. Done means the part-cooling fan responds across values 0–255 without disabling the hotend fan.
Written by the indexing model from the issue text.
Assessment
- Domain
- embedded-iot
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 25/100