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Hardware PWM not working for part cooling fan FAN_PIN PC14 #169
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I'm facing the same problem with PC14 (fan0) on the TT SP5-V3, will try with PB1 (fan1). The main problem is that the printer used 2 high rpm part cooling fans and at full spin they are really powerful, which drops a lot the nozzle temperature and may not be very good for layer adhesion. |
Hear me out, I found a way around it. Just make the Fan1 pin your Fan0. Go to the pins file (pins_MKS_ROBIN NANO_V3_common.h) and replace PC14 by PB1 on FAN0_PIN and put -1 on FAN1_PIN). I tested and now both fans start as low as 20% (very low whining) and speed up to 100% without issues. Let me know if you face any problem while doing that. |
I have had the same issue. Done as described and i cannot make marlin as i had an error calling it FAN0_PIN but i have made FAN1_PIN -1 I have changed FAN_PIN to PB1 and PC14 neither work . |
following up - i was on a slightly older marlin FAN0_PIN i have swapped to PB1 and PC14 |
I tried to swap fan pins as described above, also set PC14 as an extruder fan to automatically start when the extruder becomes hot:
Configuration_adv.h
Works well for me. Thank you very much for advice! MKS Robin Nano v3.1, Marlin bugfix-2.1.x |
I have the fan connected to PC14 "FAN1" on the board. In
pins_MKS_ROBIN_NANO_V3_common.h
FAN_PIN is set to PC14.The part cooling fan does not move when set between 0-49%, then it runs at full speed when set between 50-100%
I enabled
FAN_SOFT_PWM
and it appears to work but it is very noisy. According to https://github.com/makerbase-mks/MKS-Robin-Nano-V3.X/blob/main/README.md there are two hardware PWM fan ports.How does one use the hardware PWM associated with pin PC14?
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