unable to open out gpio chip line
New installation of latest RatOS 2.1 on Manta M8P V2.0 with CB1 on VC4 IDEX, all components updated to laters version. Klipper doesn't boot, throws error:
MCU 'rpi' error during config: Unable to open out GPIO chip line
5 Replies
I commented out this pin definition (in ratos.config) and it started:
[fan]
#pin: rpi:gpio4 # sacrifical part fan, use this to independently control your both toolhead part fans
I guess I just need to sort out which manta equialent pin to use for that
Ok, I see both of my part cooling fans don't work now. Pins are assigned correctly and I can see on manta board that voltage is being applied when I turn them on in klipper but fans don't work at all, no matter what percentage I apply to them. Is it becasue I commented out above? I though this is only to easier proxy/pick active fan but fans should still work is I turn them on independently?
If voltage is going to the fans but they don't turn on, then that's the Fan's fault
Your fans are not working because this is what makes IDEX fans work in the first place.
If you're using a CB1 you'll have to go look up gpio names in the BTT CB1 documentation and use one of those instead. Put the override in printer.cfg:
I though this is only to easier proxy/pick active fan but fans should still work is I turn them on independently?That is true. I'm guessing wiring issue (you may have swapped tach/pwm). On IDEX you're expected to use the PWM pin on the toolboards btw. If you're running both of them back to the Manta, see this post: https://discord.com/channels/582187371529764864/1306713539809116172
Well, sorry but this is fundamentally wrong statement. I can send voltage to the fan but if there is no corrent PWM signal then they will NOT turn on
thanks, will check that
I upgraded from CoreXY to IDEX. Fan on T0 was working just fine before IDEX and I didn't touch T0 so it can't be wiring issue
Ok I added arbitrary CB1 pin to the config but fans still don't work 😦 As I said, I didn't touch T0 wiring and the fan was working before so it must be some software issue still 🤔
TheTik is correct, 4028's will spin up to 100% if there's no PWM signal.
Unless you got yourself some consumer 4028's which should not be used (they're always terrible).
I wouldn't know without a debug zip to see if you messed up the configuration somehow