So far it stays within the footprint of LCD. Here is a simple rendering with dimensions https://drive.google.com/file/d/18C59D6wkfz6w5kxejMQC2ls93uSuLQG_/view?usp=sharing
On Sat, Jun 2, 2018 at 2:13 AM, Mychaela Falconia < mychaela.falco...@gmail.com> wrote: > Hi Serg, > > > A couple of notes. Would it be possible to extend the spacer by 1 mm > > outside of the LCD footprint? > > Do you mean extend by 1 mm total (extra 0.5 mm on each side), or have > an extra 1 mm on each side? I would hope that adding just 0.5 mm on > each side should be sufficient - this way there is a full 1 mm of > outer wall at the points where the alignment pins go in. Or do we > need even more outer wall at those points? > > > On the inside at the bottom legs it will be > > just 0.4 mm wall for the pin, with +/-0.1 mm precision it is too close. I > > was thinking that making a notch instead of a hole would be a better > > option. This way I can have reasonable margins on outer side. > > Yes, with my original idea the inner wall at the bottom pin hole would > only be 0.2 mm or so (if we leave another 0.2 mm of margin), so that > inner wall would essentially disappear at the widest point of the hole. > You are saying to just replace the hole with a notch, right? Probably > a good idea. > > > I have done a quick draft, does it look like a good candidate? > > https://drive.google.com/file/d/1Xd6pzuXVFUHUF1dC9Sl3Gq- > ViYBu-rKJ/view?usp=sharing > > Unfortunately I am a cave-dwelling neanderthal and have no idea what > to do with an STL file. :( > > > How much space do we have under the LCD > > I don't understand the question. Without the proposed spacer under > consideration, there is essentially zero space under the LCD module if > it is pressed against the PCB - the module is misdesigned in my > opinion. As to how much space under the LCD we need to *create* by > way of our spacer, my target is 1.5 mm, so we can accommodate a Molex > 51296-4594 connector for the FPC tail (1.30 mm height above the PCB, > the thinnest I could find that is compatible with this LCD module's > tail configuration) with a little bit of margin. > > > and can we have the spacer sticking > > outside of the screen footprint? > > Yes, we can make the spacer footprint extend a little wider than the > 38.40 mm width of the LCD module, but we should only extend it as much > as absolutely necessary. > > > I made it 2 mm wide > > Does it mean that the inner edge of each wall coincides with the > innermost point of the alignment pin on that side while the outer edge > of each wall extends 0.5 mm past the outer edge of the module shell? > > > and 1.5 at the bottom > > to accommodate the flat cable. > > We need the space not so much for the flat cable (FPC tail), but for > the PCB-mounted connector into which this FPC tail will need to go. > > At this point the most effective way for you to help this project > would be to receive a physical LCD module from me and start > experimenting with it hands-on. Where should I send it? > > M~ > _______________________________________________ > Community mailing list > Community@freecalypso.org > https://www.freecalypso.org/mailman/listinfo/community > _______________________________________________ Community mailing list Community@freecalypso.org https://www.freecalypso.org/mailman/listinfo/community