# FDM 3d printed PicoCalc backcase **URL:** \ **Category:** PicoCalc\ **Tags:** 3dprinting, 3dmodel\ **Created:** [March 30, 2025, 3:05am UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391 "2025-03-30T03:05:28Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![hisptoot](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/hisptoot/32/5260_2.png) [@hisptoot](https://forum.clockworkpi.com/u/hisptoot)\ **Post date:** [March 30, 2025, 3:05am UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/1 "2025-03-30T03:05:28Z")
I modified the official step file. Make the back completely flat. Now it is fdm-friendly. Carefully remove one layer support under the power button, the button also works. I also cut a hole for easy accessing the tf card of luckfox lyra. Here’s the modified step file and 3mf project: > **[picocalc\_case\_fdm - Google Drive](https://drive.google.com/drive/folders/17a0IdnE8-Tl5uQyK4t0kwoATtQXs5acB?usp=sharing)** ![1000125586](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/2X/6/6dd3640f28f14aac1c295b640e21756407315c53.jpeg) ![1000125587](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/2X/b/bf5ed434abb4859eb4bd36b2cbbfa2e27b43cfc3.jpeg) ![1000125589](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/2X/d/d23a7aecba9d0efdf6a7ca44c3e5f552b9e86805.jpeg) ![1000125591](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/2X/8/8fada89ec7bca6549c9990b90c5389a3a4fd2dd8.jpeg) ![1000125590](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/2X/c/c02927596c20e3eab96731b80dcba5b032182aaf.jpeg) The filament is polyterra pla. The print finished in two hour. ---
**Author:** ![michael\_mayer](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/michael_mayer/32/5278_2.png) [@michael\_mayer](https://forum.clockworkpi.com/u/michael_mayer)\ **Post date:** [March 30, 2025, 7:11am UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/2 "2025-03-30T07:11:06Z")
It would be nice if you put this model on printables or other 3d printing sides. ---
**Author:** ![hisptoot](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/hisptoot/32/5260_2.png) [@hisptoot](https://forum.clockworkpi.com/u/hisptoot)\ **Post date:** [April 7, 2025, 4:25pm UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/3 "2025-04-07T16:25:06Z")
Now core module can be easily swapped. No need to worry about damaging screen. Files are uploaded to google drive. ![1000126223](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/2X/f/f5eaec0c0f4e40e4d7f3f3f4af906abc02e4d685.jpeg) ![1000126224](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/2X/d/d76d92823384a389ea489b22e2f21782b5c4c1eb.jpeg) ![1000126221](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/2X/1/1421a67ca25cc9e4d6dd37ed5ce0ea26c47917a6.jpeg) ![1000126217](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/2X/f/f1e22d7ccf7b4e196b7fc536b7c2881b94b36775.jpeg) ![1000126216](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/2X/6/611e1f9434f415c8e5c300c92a906e54527b43ee.jpeg) ---
**Author:** ![DigitalDreams](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/digitaldreams/32/16007_2.png) [@DigitalDreams](https://forum.clockworkpi.com/u/DigitalDreams)\ **Post date:** [April 7, 2025, 4:31pm UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/4 "2025-04-07T16:31:46Z")
Just an initial idea, maybe less cutout over the lcd cable to make it easier to lever out modules ? ---
**Author:** ![auslandermaus](https://avatars.discourse-cdn.com/v4/letter/a/97f17d/32.png) [@auslandermaus](https://forum.clockworkpi.com/u/auslandermaus)\ **Post date:** [April 7, 2025, 5:43pm UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/5 "2025-04-07T17:43:34Z")
Polyterra pla is just fantastic. Nicely done! ---
**Author:** ![michael\_mayer](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/michael_mayer/32/5278_2.png) [@michael\_mayer](https://forum.clockworkpi.com/u/michael_mayer)\ **Post date:** [April 8, 2025, 10:25am UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/6 "2025-04-08T10:25:29Z")
I thinking about adding a external usb port on the topside. I give it today a shot in freecad. BTW: great design. I like the threaded inserts! ---
**Author:** ![michael\_mayer](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/michael_mayer/32/5278_2.png) [@michael\_mayer](https://forum.clockworkpi.com/u/michael_mayer)\ **Post date:** [April 9, 2025, 5:28am UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/7 "2025-04-09T05:28:02Z")
Backpanel with USB-A Port for luckfox lyra: ![image](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/2X/1/18739280d07cb4fb9383736772f48de3aae227a7.jpeg) ---
**Author:** ![wezm](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/wezm/32/11469_2.png) [@wezm](https://forum.clockworkpi.com/u/wezm)\ **Post date:** [April 10, 2025, 1:29am UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/8 "2025-04-10T01:29:33Z")
One thing I’d like in a custom back case if I print one is a little storage slot for the allen key. 🙂 ---
**Author:** ![Hatchback4](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/hatchback4/32/10076_2.png) [@Hatchback4](https://forum.clockworkpi.com/u/Hatchback4)\ **Post date:** [April 10, 2025, 1:43am UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/9 "2025-04-10T01:43:11Z")
Curious, how does this model prevent screen damage? ---
**Author:** ![hisptoot](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/hisptoot/32/5260_2.png) [@hisptoot](https://forum.clockworkpi.com/u/hisptoot)\ **Post date:** [April 10, 2025, 1:56am UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/10 "2025-04-10T01:56:21Z")
see other posts about how they get the screen damaged when swapping core module. This case just hold the front case, mother board and screen together when swapping core module. The screen won’t pop out and get misaligned. ---
**Author:** ![michael\_mayer](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/michael_mayer/32/5278_2.png) [@michael\_mayer](https://forum.clockworkpi.com/u/michael_mayer)\ **Post date:** [April 10, 2025, 5:46am UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/11 "2025-04-10T05:46:45Z")
> **[PicoCalc back banel with USB port and back access by michael mayer | Download...](https://www.printables.com/model/1260284-picocalc-back-banel-with-usb-port-and-back-access)** > > This is a PicoCalc backpanel I have design with an additional Port (20x10 mm) for assessors and a big opening panel. | Download free 3D printable STL models I leave the link here also. ---
**Author:** ![Abdallah\_Natsheh](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/abdallah_natsheh/32/10155_2.png) [@Abdallah\_Natsheh](https://forum.clockworkpi.com/u/Abdallah_Natsheh)\ **Post date:** [April 10, 2025, 6:15pm UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/12 "2025-04-10T18:15:56Z")
can you modify the back opening to the same as the one that covers the batteries ? ---
**Author:** ![michael\_mayer](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/michael_mayer/32/5278_2.png) [@michael\_mayer](https://forum.clockworkpi.com/u/michael_mayer)\ **Post date:** [April 10, 2025, 9:57pm UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/13 "2025-04-10T21:57:49Z")
Ok, i am on it .. ![image](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/2X/d/d77b6b328a657d4d51e2f764cdf0a3e48f4c1651.png) ![image](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/2X/c/cbe307bf53819c16f22d25ad5a38833ae4452cef.png) ---
**Author:** ![jutleys](https://avatars.discourse-cdn.com/v4/letter/j/779978/32.png) [@jutleys](https://forum.clockworkpi.com/u/jutleys)\ **Post date:** [April 11, 2025, 7:47am UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/14 "2025-04-11T07:47:21Z")
This looks like very good work Michael keep it up. ---
**Author:** ![Hatchback4](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/hatchback4/32/10076_2.png) [@Hatchback4](https://forum.clockworkpi.com/u/Hatchback4)\ **Post date:** [April 11, 2025, 8:14pm UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/15 "2025-04-11T20:14:47Z")
Ooooh I get it now. That makes a lot of sense. Any way you could modify your first design to support a click in cover like the batteries or perhaps use regular nuts instead of heatset inserts? ---
**Author:** ![MrSVCD](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/mrsvcd/32/11962_2.png) [@MrSVCD](https://forum.clockworkpi.com/u/MrSVCD)\ **Post date:** [April 29, 2025, 2:13pm UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/16 "2025-04-29T14:13:21Z")
I have ordered a Lyra Plus and I wonder if it fits in your shell? The ether port doesn’t need to be accessible since I plan on putting some sort of removable jack on the outside. ---
**Author:** ![jutleys](https://avatars.discourse-cdn.com/v4/letter/j/779978/32.png) [@jutleys](https://forum.clockworkpi.com/u/jutleys)\ **Post date:** [April 30, 2025, 12:24pm UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/17 "2025-04-30T12:24:22Z")
Thank you @michael_mayer ![1000003840](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/2X/c/ca6878d15da94c2a24cbf99b83ff85867a5d02ea.jpeg) ![1000003839](https://canada1.discourse-cdn.com/flex029/uploads/clockworkpi/original/2X/b/b79f942300b8f44be1f3c5af28eb312a7cee69f1.jpeg) ---
**Author:** ![DigitalDreams](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/digitaldreams/32/16007_2.png) [@DigitalDreams](https://forum.clockworkpi.com/u/DigitalDreams)\ **Post date:** [April 30, 2025, 1:15pm UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/18 "2025-04-30T13:15:24Z")
Second day with my beastie and an idea has quickly presented itself. If removing the whole back to access the main board maybe have holes where the middle two screws (not corners) are and put spacers on those screws… Hence the main board is still held into the front of the case to stop the display coming loose AND flexing the display connector !. ---
**Author:** ![michael\_mayer](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/michael_mayer/32/5278_2.png) [@michael\_mayer](https://forum.clockworkpi.com/u/michael_mayer)\ **Post date:** [April 30, 2025, 1:25pm UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/19 "2025-04-30T13:25:17Z")
That makes sense. I have anyhow currently screwed only the 4 corner screws in. ---
**Author:** ![Hatchback4](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/hatchback4/32/10076_2.png) [@Hatchback4](https://forum.clockworkpi.com/u/Hatchback4)\ **Post date:** [May 18, 2025, 6:20am UTC](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391/20 "2025-05-18T06:20:57Z")
I had the same thought. Definitely would help reduce the chance of damage. I’ve also put some electrical tape around the screen to hopefully prevent it from shifting around if I swap microcontrollers. [Next page](https://forum.clockworkpi.com/t/fdm-3d-printed-picocalc-backcase/16391.md?page=2)