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Creality Ender-3 Control Box for BIQU/BigTreeTech SKR 1.1 and 1.3

by thisiskeithb Feb 2, 2019
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If your TMC2208 heatsinks are too tall you can put the fan on top of the case and add this fan cover:


Ender 3 fan cover (TMC2208 SKR 1.3)

Are those 12V noctua fans? How do you have them wired?

They are 12v Noctua fans wired to an LM2596 buck converter.

Thanks! It looks like they're wired in parallel to the same converter, but in your picture, on the converter's output side, the green and black wires disappear into the motherboard area and don't seem to be headed to the fans.

Do you have the fans parallel connection happening somewhere else that isn't pictured?

There is 24v coming from HE1 (FAN1_PIN) into the buck converter and the output side powers three 40mm Noctuas: Two in the control box & one on the hotend side. The green & black wire you're referring to goes to the hotend cooling fan. The fans are all wired in parallel off the buck converter's output.

You can view my full config here.

Perfect, thank you!

Great design.

I had these two problems:

1) The heatsinks of my TMC 2208 were too long to fit the stock fan.

2) The screw holes were too tight.

Here is how I solved both:

1) I simply put the fan on the side of my drivers and added double sided tape on both sides: https://i.imgur.com/hvDv68I.jpg

2) I heated up the screws with a small blow torch, screwed them in while they were still hot and then let them cool. That made the screw holes have the exact dimensions plus it gave them a thread: https://i.imgur.com/ZsPn4hg.jpg

Hi there, Is it possible for you to remix this for me? i don't have the skills :-( I would like to use the following fan... Noctua NF-A9x14 PWM

Is there install instructions for this board on this printer I've looked everywhere? Is this upgrade worth the hassle? Thank you for making the control box for it btw.

Did the compatibility through TMC2130 drivers that have high heatsink have been solved?

You'll need to use shorter heatsinks or try removing the "lid fan holder" to see if there's enough clearance for your heatsinks.

Is it possible to use the original ender 3 lid? Or is the cooling not efficient enough?

You'll probably want to print the new lid design since it has fans located directly over the drivers.

Do you intend the fans to be blowing into the case, or sucking air out of it?

I'm not sure how the original designer intended them to be configured, but I'd say it's up to you. I have mine pulling air over the stepper drivers/board.

The FYSETC 2208s have pretty tall heatsinks. I'm running into the issue of having the fan (on the stock top) smacking against the X-axis driver heatsink.

Hmm. I'm running TMC5160s which don't require heatsinks, so I didn't see this issue. Does the lid fit if you leave off the "fan holder" that retains the fans?

Could you upload the case in a file that could be edited? I've got the V1.3 and the USB and SD are in slightly different positions.


This is a remix from an STL, so I don’t have a version that can be edited.

Edit: I've added an SKR 1.3-compatible case.

Can you share real photo please?

Edit: I've uploaded photos.