I have an issue with my UMO that I didn't notice before (it might not be new, but I never noticed it before).
When I use the fan at a low percentage I cannot get a stable temperature...
I did some test with a print this evening, temperature set to 225°C.
- Fan off: after 2 or 3 oscillations, it sticks on 225°C and doesn't deviate anymore
- Fan 10-20%: it never stabilize jumps between 222 and 228°C!
- Fan 50%: a bit more stable 224-226°C
- Fan 100%: stable at 225°C, no deviation
I may be completely wrong, but I have the impression that the PWM fan influences the sensor.
Anybody already seen that?
(It is an old 1.5.3 board with thermocouple)
Temperature control & fan speed
- Neotko
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Re: Temperature control & fan speed
The test was done with the bed making the air bounce on the block? I suppose not, so it's really weird I suppose. I know very very little of the 1.5.x boards.
- LePaul
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Re: Temperature control & fan speed
I've only run 100% fan but tonight I plan to try out XT-CF20 with No Fan...I'll see if the temp bounces around
- LePaul
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Re: Temperature control & fan speed
I'm printing now. No fan. Temp set to 256 and seeing it bounce around from 255 to 257. Nothing wider than that so far!
- martin-bienz
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Re: Temperature control & fan speed
Well, yes. I have that also. I think since the beginning. I just ignored it / accepted that PWM is messing with the sensor. I allways see it at the beginning of prints as the fan slowly starts up... I am pretty sure it's PWM and I assumed this is "normal". I see that because I sometimes have to manually help the fan to start in the beginning ... after the first layers when the fan kicks in fully, no issue.Amedee wrote: Anybody already seen that?
I have never looked at it in detail... will try to the next print. But I am again off a few days (congress).
- Amedee
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Re: Temperature control & fan speed
Yes, I guess I never noticed before because it is common that when you start the fan the nozzle needs to adjust a bit.
What made me looked more in detail is that nowadays i tend to use very little fan and it stays in the 10-20% range while in the past it would just have been a transition...
What made me looked more in detail is that nowadays i tend to use very little fan and it stays in the 10-20% range while in the past it would just have been a transition...