Enclosure, building volume & temperatures
hi community,
primary due to noise reasons, i'm actually building an enclosure for my MK2. it'll give my printer a convenient volume of ~189 liter (inner dimensions: 61.2 cm width, 55 cm depth, 56.2 cm height). btw. the front of the enclosure will be the often used IKEA SINDVIK glass door 60x64 cm :).
so it'll be enough room (much more than using SAMLA or BELLA plastic boxes) for the whole printer, including damper and filament bobbin.
anyway, i'm a little bit concerned about the expected temperatures inside the enclosure. i won't set printing abs (occasionally) aside, so i guess it's going to be very cosy inside the box.
do you think that it's nescessary to mount the power supply outside of the box ? and what about the rambo board (would be very laborious) ?
will a fan be nescessary to avoid damage to the electronics ? if so, wouldn't it degrade printing with high bed temperatures ?
thank's for your comments 🙄
jj
dem inscheniör is' nix zu schwör...
Re: Enclosure, building volume & temperatures
I don't know about fully enclosed boxes. I've got a cutout in the sidewall where the Power supply is located and 1cm wide slots for venting just below the top. Eventually I was going to print removable covers to close the slots or even make the "flow" adjustable but didn't bother to do so yet, since it's working well as is.
It raises the temperature only slightly in my 125l box but avoids drafts and most importantly cuts down on noise and dust & dogfur (the bane of my existence in my maker basement)
Anyway, maybe that's something to think about: cut out some slots to add adjustable airflow and see where you end up.
Re: Enclosure, building volume & temperatures
Just some data points for you to consider:
-Different brands of PLA will have problems if the air temp gets to high. Hatchbox black PLA get clogged in the gear at 112F.
-Stepper motors generally get hot and start to have issues starting at 110F
-The power supply has a thermal fuse that will trip at a certain temp
-The pinda probe measurements need to be done at a certain temp, just the heat from the bed can change measurement values
On another note I run a heated enclosure which keeps the temp between 85F and 92F for another 3D printer I am using.
Re: Enclosure, building volume & temperatures
Stepper motors generally get hot and start to have issues starting at 110F
that's a pretty low temperature to get problems !
my flat is right under the roof... in summer the room temperature alone rises up to approximately 100F.
so maybe i've to think about two ducts.
thank's for the hints !
jj
dem inscheniör is' nix zu schwör...
Re: Enclosure, building volume & temperatures
With regard to the stepper motors and heat, it was something I read on another 3D printing forum so it may not be an issue for the MK2 steppers. I wonder if that is the temp at which some steppers can no longer air cool effectively and the actual temp on the steppers is higher. I've also notice that some custom 3D printing machines have heat sinks applied to them in DIY style.
Also found this which has good information: http://www.sd3d.com/stepper-motor-cooling/
TLDR: Starting at 30c / 86F steppers may begin to see issue if under certain conditions (running the print fast).