Fans turn on / stay on whenever ambient room temperature drops below MINTEMP
Hello, I have recently upgraded the firmware on my MK3 machines and noticed that the most annoying feature of this printer is now even worse. The problem is that in the winter the machines always drop below MINTEMP whenever they are done printing and thanks to some genius at Prusa I am forced to pull out a heat gun and warm up both the print bed and the extruder manually so that I can then restart the machine and then am able to select the preheat option. This is SUPER annoying because the machine has its own heater so why TF to I have to do it manually? Now it is is even worse with the new firmware because when I start each workday I am greeted by each machine in my print farm running both fans simultaneously in order to celebrate how it has locked me out of using them, and now when I do that stupid manual warmup procedure I am forced to listen to the machines beep VERY LOUDLY in order to inform me that they are finally done being stubborn about their temperature levels.
I was REALLY hoping that upgrading the firmware would eliminate the pointless MINTEMP problem but am instead REALLY disappointed that the Prusa engineers have made it worse instead of better. Please can someone advise me how to disable this awful "feature"
Thanks in advance, I love everything about these machines except for this one thing that has been annoying me for half a decade now.
RE: Fans turn on / stay on whenever ambient room temperature drops below MINTEMP
I also wanted to say that I have read other threads on here about the mintemp issue and so I understand that thermistors are unreliable below some certain threshold, legal risk factor for prusa in allowing a machine to operate below the threshold. My complaint is not that the problem exists in the first place, but rather that the firmware has made it much worse now.
RE: Fans turn on / stay on whenever ambient room temperature drops below MINTEMP
I anticipate that the official response is gonna be something like "compile a custom build of the firmware yourself if you wanna circumvent safety features" so can someone please direct me toward some kind of tutorial or guide on how to make simple mods to the open source part of this machine.
RE: Fans turn on / stay on whenever ambient room temperature drops below MINTEMP
Hi again, well I appreciate all of the great feedback I've received on this topic so far, thanks folks. As much as I'd love to say that I'll just find some other company to support with my business, I begrudgingly just purchased several new MK4 machines in order to upgrade my print farm. I really hope they do not share all of the terrible firmware features that just bricked my MK3 machines. When I say "brick" here is what I mean: now if a job finishes up with short Z-height and then the machine locks up after cooling down below mintemp, I need to turn it on/off about a dozen times (with LOUD BEEPS each time) in order to get the print head to raise up enough to even aim the heat gun at it. If I forget to do this before warming the bed above mintemp then there is no way at all that I can raise up the print head until I let the effing bed cool down again! Seriously, this is stupid. At least with the old firmware the machine would still allow me to raise the Z-axis while it was too cold to run prints. Truly this firmware update has done nothing to improve my printing experience and overall I terribly regret installing it. Unfortunately I anticipate that my new MK4 machines will behave just as obstinately. Two thumbs down on this matter Prusa.