gregdavill/d20-hardware

Hardware design files for the icosahedran d20 build.

d20-hardware

Hardware design files for the icosahedron d20 build.

Read the blog post to read more about the project: https://gregdavill.com/blog/d20

Assembly BOM

• 1x d20-control PCBA
• 20x d20-tri PCBA
• 20x 6P 0.5mm FFC, 50mm length, opposite side
• 1x d20_enclosure_r0.1_001.stl
• 1x d20_enclosure_r0.1_002.stl
• 1x Sony NP-FW50 battery (knock-offs work fine)

PCBs

Please use version r0.3 of the d20-tri boards, the earlier versions have severe errata.

d20-hardware's Issues

Fix BOM

Many of these PCBs were designed with Skidl, and the xml output format of the BOM doesn't contain orderable part numbers.

Enclosure walls reported to be too thin for 3D printing

I just tried to get the enclosures printed by JLCPCB, as I don't have a printer. I uploaded both .stl files and using PA12-HP Nylon as the material, sent them for inspection before printing and they got back to me a few hours later:

As shown below, the wall thickness of the indicated red area is not enough which has a high risk of deformation, crack and loss, will this risk be acceptable for you? Yes or NO??

If not, could you please kindly increase it to be at least 1mm to proceed?

It would be much better if the thickness of the whole model can be increased into 2mm.

In hindsight, they do specify the requirements for 3D printing below the upload button:

Not being familiar with 3D printing (but willing to learn!), and on the off-chance someone else runs into the same issue, I wanted to ask you what steps should be taken at this point, if any.

Can't open step file

It seems that (at least for me) there is a problem with the step file of the enclosure, even after half an hour FreeCAD and Fusion 360 are both still opening/uploading the file.

JLCPCB controller printing issue

I uploaded the controller zip file to PCB to be printed, and they just got back to me with this:

Sorry to bother you, but there is an issue that we want to confirm with you before proceeding.

As shown below, comparing the drill diameter the drawing chart, it seems that the holes on the drill layer have been compensated, is the file used for production before? Please help to confirm A or B?

A:If the file is production file, we fabricate as per this gerber without further compensation and optimization

B: If the gerber is original file, that means we will add +0.05 for NPTH and +0.15 for PTH, + 0.015mm trace width when we making production file..(Making clearance for the data of gerber file )

I'm not sure I understand the question, but I think they are asking whether this file has been printed before without problems, in which case I should be replying with A. What do you think?

I'm creating the issue in case anyone else experiences the same confusion in the future.