Case size_2 for Arduino Mega R3 and RAMPS 1.4 (for Prusa i3 or other)

by iPa64 Jun 3, 2015
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so the cut out on the front panel is there, but the connector on the board is way back?


Any possibility for a lid suitable for an 80mm or 92mm fan?

Thanks for the case.

I was hoping to find which screws to use and for which size the fan holes are designed. But unfortunately i was unable to find this information.

(I am on my phone and for some reasons i could not find the files, so i was wondering if you could upload the source files if you did not do so already. Thanks!)

did you ever find out what screws to use?

M3 countersunk 10-12mm

What size fan is this designed for, please? If not 80mm fan in the lid / top, could you please consider posting a lid suitable for an 80mm fan? The reason is that I must keep noise to a minimum so only use larger low-noise fans.


Nicely designed, I printed this in PETg which I find best for Flat objects no warping etc, and assembled with small self tappers. Enough space for wiring and cooling, if you remove the front with the error no one else will end up printing two fronts as I did (printed from my phone saw front and printed it) didn't think to scroll down and look for a different front..

Just 3 more to print noe haven't had time to design and not seen one I would use need to tidy up my machines wiring. 2 more Printers, CNC and Laser CNC.

Interesting for the PET, what parameters do you use to print PET? speed and temperature?

Temperature between 230-240c bed 60c onto mirror glass with matching color ABS slurry then drops off when cooling presumably diferent shrinkage rates make this so easy it almost falls off, slurry leaves mirror finish on bottom of item. Print speeds same as PLA, bridging is poor so I stick to 40% fill honeycomb as a rule and supports are not as easy to use or clean so not used by me. Mainly used for flatter thinner prints where I want no shrinkage or warping, anything like this item is ideal I do not use cooling fan at all unless manually turn it on for bridging small gaps.

Thanks a lot for these very complete informations. I will try to use PET.

I have printed two so far and great outcome easy to add to projects as assembled around build.

Yes it is
Need just to find time, maybe this weekend

No problem


Is it possible to post a top without a hole in the middle?


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I printed the bottom piece and either the front panel is off or the board mounts are off because the USB doesn't line up with the Arduino Mega standard layout. It's 5 mm too far to the left and so is the hole for the power connections I'm guessing something got muffed when you expanded the cabinet size because it lines up OK on your other enclosure but not this one

I printed out the rest of this and everything fits except the front panel is off. All 3 cutouts need to be moved 5mm to the right. Since one side was expanded 5mm I'm guessing you mismeasured something but if you move all 3 cutouts 5 mm to the right you should be golden.

Nice job on the nut wells, I managed to get 15 of 16 in without breaking anything and the one that cracked only cracked part way on one side and a little super glue applied with a toothpick seems to have done the trick in repairing it. Fix the front panel and after I print it I'll upload some pictures for you. I'm definitely going to give your Arduino Mega/Uno case a shot too

please try Front_side_Size2_corrected.stl

That did the trick, when I get the time I'll take a few photos and upload them.

This has 2 things I need in an enclosure for high current power (heat producing) designs, adequate airflow for cooling and serviceability.

If you want to increase the cooling/air flow performance even more one tip I can give you (I'm an EE with over 22 years experience in Industrial and HVAC controls) is add some vents right under the Mega PCB and 10-15 mm tall feet on the bottom and run the fan blowing outward. That will create a slight negative pressure inside the enclosure and it will draw cool air in through the side and bottom vents (and a little through the front and back too) and exhaust hot air out the top of the enclosure. You'll get more CFM of airflow through the cabinet than blowing air in and working against all that back pressure from a small enclosure.

Thanks for the airflow tips, makes a lot of sense how you explained it.
Much appreciated.

Hi longjohn119,
Yes there is some differences between version and espacelly with China copy, like mine.
But if you give me accurately informations I can provide you a modified version.

Actually I made a mistake since the connectors don't actually go through the front panel (I looked at your other design with the pictures) but are recessed inside the cabinet so it should work fine.

I really like this design because all the others are simply too small for proper cooling. Designing small for small's sake is a common design error that I see as an EE all the time. I have a Printr Board (clone) controller in a case that's too small and cooling is a big problem since there is no extra space for wire bundles. Adding small heatsinks to the stepper drivers helped but a larger cabinet would do it more good

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