92mm Fan + 40mm Stepper Coolers for Big Tree Tech Manta M5P Case V0.2

This mod allows the lid (Remix of Big Tree Tech Manta M5P Case V0.2 - Lid for 92mmx14 fan), when used with the BTT Manta M5P V0.2 Internal Fans_12mm Hole or BTT Manta M5P Body V0.2 Fans Inside (either BTT Manta M5P V0.2 Internal Fan model, which is taller) to accommodate up to a 25mm height 92mm main fan, as well as 40mm fans for direct cooling of stepper driverz.

You MUST print the taller version of the case (Internal) in order to use the fans specified below. 

If you are looking for Max cooling and less footprint, this might work with the “External” versions of the case and allow run thin fans inside of the case. I have not tested this. 

Took Lid for 92mmx14 fan, moved it to center over the CB slot and Manta M5P board not inclusive of steppers. This was mostly to avoid spending another $16 on a thinner Noctua 92mm fan. This move allowed a higher airflow/quieter/more commonly available 25mm depth 92mm fan. 
 

Additionally, the hub of the fan aligns mostly on the fan connectors, so the fan blades are directly moving air over the CB1/CB2/Pi heatsink, as well as moving air over the Manta M5P Microcontroller, as well as the fuses etc. 

This led me to eye my new, slightly more expensive BTT TMC5160T Pro V1.0 steppers, and their very lonely heat sinks sitting in the corner. Since I intend to eventually push 48V to my stepper motors, I figured that I would just design a dedicated air cooling space for them on the lid. 

I added 2x 40x40 pattern mounts/grills to directly cool the steppers from above.  I used cutouts of the Lid referenced as a remix. I reduced the thickness of the mesh to allow the fan less interference on airflow. 

I then added 2x 40mm fan spaces directly over the steppers, again in a way that will allow all 5 to be cooled  effeciently by either (Motor 1 and 2 for “top” 40mm fan, Motor 4 and 5 for “bottom”  40mm fan), or both (Motor 3 on overlap of both fans). 

I have not received my fans yet from cooler guys, but the plan is to use 2x “Coolerguys 40mm(40x40x10mm) 12v Ultra Quiet Fan CG4010L12S for SY124010L” fans on a custom Y-cable connected to the constant-on fan (+FAN-). It took me quite some time to find these, but they are dirt cheap, and advertised as 4.3 CFM and 14.00 dBA, which should work OK for the uncontrolled fan on the board, keeping the steppers cool and not being annoying. 

You may be able to use a 4020 or 4015 fan if you use the taller “inside” case over the steppers; I have not tested.  


Screws and bolts can be used, or M3 melt-in inserts if you want to be fancy and don't mind them not going all the way in. Thickness of bottom of lid is unchanged (3mm), so most M3 melt-ins will slightly protrude. I suggest putting them in from the side facing the board, so they can act as further standoffs from the mesh to allow less restricted flow. 

Originally had this published with both models remixed, so apologies to  the lid designer @squirrelf3d-- all of my work is based on their remix. I published this under the main case by @Raziel_163191 to make this easier to find for people printing/using this case.