6XD Dimensions Documentation Error

[Maestro]

Bit of a weird one here...

I printed a mounting plate for the 6XD a while back and found that it didn't quite fit right. Recently I made a new one, built in assembly from the STEP on GitHub, and it fit perfectly. That got me curious.

My original part was made from the physical dimension drawing on the 6XD Hardware Overview page. This drawing indicates a 5mm offset from the board edges for the mounting holes; hole coordinates (5,5), (5,135), (110,5), (110,135).

However, based on the CAD files on Github, (both v1.0 and v1.01) and my real-life genuine Duet 6XD v1.01, the mounting hole near the VLC fuses actually has a 5.5mm offset from the edges; it does not match the other holes, and the holes do not form a rectangle, as this hole is at (5.5,134.5).

The dimension drawing on the overview page is for v0.1 and v1.0, and I have v1.01. However, the STEP for v1.0 also has this asymmetric hole, so it does not seem to be the case that this is just an oddity in v1.01 (the only board I can physically measure), and the dimensional drawings are accurate for v0.1 and 1.0; at the very least, the drawing and the CAD for v1.0 are discrepant.

So, it seems likely that the original error here is in the CAD, as there doesn't seem to be any reason to asymmetrically crowd a perimeter hole into component space. However, the physical boards exist, so at this point the relevant error is in the dimensional documentation, which does not indicate real-world hole-spacing.

[droftarts]

@Maestro thanks for pointing this out, one for @T3P3Tony as he designs the boards!

Ian

[T3P3Tony]

@Maestro thanks, its updated.

[Maestro]

@T3P3Tony I would suggest either removing or updating the 130mm dimension up the left side as well, as this dimension is in fact 129.5.

Splitting the proverbial hair, I know!